ICD140A - Unspecified Black Box - Free user manual and instructions

USER MANUAL ICD140A Black Box

Industrial Isolated Converter

User Manual

Enables any host USB port to provide multiple RS-232, RS-422, or RS-485 two- or four-wire serial interfaces. 2- and 4-port versions are available.

Power + -h USB Host P1 P2 P1 P2 Pwr TX RX 232 485 2W 422 485 4W PORT 1 PORT 2 BLACK BOX® www.blackbox.com

USB Host P1 P2 P3 P4 TX Port 1 Port 2 PORT 3 PORT 4 BLACK BOX®

Trademarks Used in this Manual

Black Box and the Double Diamond logo are registered trademarks of BB Technologies, Inc.

Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

Disclaimer:

Black Box Network Services shall not be liable for damages of any kind, including, but not limited to, punitive, consequential or cost of cover damages, resulting from any errors in the product information or specifications set forth in this document and Black Box Network Services may revise this document at any time without notice.

We're here to help! If you have any questions about your application or our products, contact Black Box Tech Support at 724-746-5500 or go to blackbox.com and click on "Talk to Black Box."

You'll be live with one of our technical experts in less than 60 seconds.

Federal Communications Commission and Industry Canada Radio Frequency Interference Statements

This equipment generates, uses, and can radiate radio-frequency energy, and if not installed and used properly, that is, in strict accordance with the manufacturer's instructions, may cause interference to radio communication. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada.

All safety related regulations, local codes and instructions that appear in the literature or on equipment must be observed to ensure personal safety and to prevent damage to either the instrument or equipment connected to it. If equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

UL Class 1, Div. 2 Explosion Hazard Warning

Suitable for use in Class 1, Division 2, Groups A, B, C, and D Hazardous Locations, or Nonhazardous locations only.

WARNING — EXPLOSION HAZARD — DO NOT DISCONNECT EQUIPMENT WHILE THE CIRCUIT IS LIVE UNLESS THE AREA IS KNOWN TO BE FREE OF IGNITABLE CONCENTRATIONS.

Install in accordance with control drawing number 9340R0

Ind. Cont. Eq.

For HAZ LOC

3HTV

E245548

Class 1, Div. 2, Groups A, B, C, & D

Temp. Code: T4

2.1 Description 12
2.2 Features....12
2.3 What's Included 12
2.4 Hardware Description....13

2.4.1 Industrial Isolated Converter, 2-Port (ICD120A) 13
2.4.2 Industrial Isolated Converter, 4-Port (ICD140A)....14

2.5 Typical Application/Modes of Operation 14

1. Quick Start Guide....15
2. Software Installation....17

4.1 Installing the Driver....17
4.2 Un-installing the Driver....18

1. Hardware Installation....20

5.1 Installing and Mounting the ICD120A or ICD140A....20
5.2 Connecting Power 20
5.3 Connecting to a PC....21
5.4 Connecting to the Serial Ports....21
5.5 Termination and Biasing 22
5.6 Setting COM Port Operating Modes 22
5.7 LED Indicators....23

1. Advanced User Settings....24

6.1 Setting Serial Port Properties 24
6.2 Advanced Settings in Device Manager 25
6.3 Modbus Basics....26

Appendix A. Loopback Test and Serial Port Wiring....27

A.1 Loopback Test 27
A.2 Serial Port Wiring....29

Appendix B. Troubleshooting....32

1. Specifications
1.1 General Specifications
Baud Rate (kbps)	300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 38400, 57600, 115200, 230400, 460800, 921600
Data Bits 5, 6, 7, 8
Parity None, Odd, Even
Stop Bit(s) 0, 1, 2
Driver WHQL
Isolation 2 kV port to port
Enclosure Mounting DIN adapter,	panel mounting with mounting kit
Operating Systems Supported	Server 2008 R2, Windows 7, Windows 7 x64, Windows Server 2008, Windows Server 2008 x64, Windows Vista, Windows Vista x64, Windows Server 2003, Windows Server 2003 x64, Windows XP, Windows XP x64, Windows 2000
Protocols USB 1.1 and 2.0
RS-232 Lines Supported TD, RD, RTS, CTS, DTR, DSR, DCD, GND
RS-422/485 Lines (4-wire) TDA(-), TDB(+), RDA(-), RDB(+), GND
RS-485 Lines (2-wire) DATA A(-), DATA B(+), GND
RS-422/485 HS Loopback	Loopback RTS to CTS, DTR to DSR/DCD
Serial Modes	RS-232 (DTE), RS-485 (2-wire), RS-485 (4-wire)
Speed	1.5 Mbps, 12 Mbps, 480 Mbps
User Controls	(1) Quad DIP switch for user hardware selection per port
Connectors	ICD120A:Upstream: (1) USB Type B high-retention (15 Newton/3.4 lb. withdrawal force);Serial Port: (2) DB9 connectors;ICD140A:Upstream: (1) USB Type B high-retention (15 Newton/3.4 lb. withdrawal force);Serial Port: (4) DB9 connectors;Power Connector (ICD120A and ICD140A):(1) 3-position removable terminal block, (1) threaded barrel jack with center positive (+)
Indicators	ICD120A: (4) Communication LEDs: P1 TX, P1 RX, P2 TX, P2 RX blink green when data is present,(1) Power LED (continuously ON if powered via an external power supply or terminal block);ICD140A: (8) Communication LEDs: P1 TX, P1 RX, P2 TX, P2 RX, P3 TX, P4 RX, P4 TX, P4 RX blink green when data is present,(1) Power LED (continuously ON if powered via an external power supply or terminal block)
Power	10-VDC to 48-VDC power supply (not included);(1) 3-position removable terminal block, (1) threaded barrel jack with center positive (+)
Dimensions	ICD120A: 1.4"H x 5.4"W x 3.5"D (3.5 x 13.8 x 8.8 cm);ICD140A: 1.4"H x 8"W x 4.7"D (3.5 x 20.3 x 12 cm)
Weight	ICD120A: 0.88 lb. (0.40 kg);ICD140A: 1.5 lb. (0.68 kg)
1.2 Approvals
UL Class 1, Div 2
Emissions FCC Class B, CISPR Class B (EN55022)
CE EN61000-6-2:2005 — Heavy	industrial;EN61000-4-2:2005 — (ESD) ±8 kV contact, ±15 kV air;EN61000-4-3:2006 — (RI) 10 Vm. 80 to 1000 <Jz;3 V/M. 1.3 to 2.7 GHz;EN61000-4-4:2004 — (EFT Burst) ±2 kV DC ports;±1kV signal ports;EN61000-4-5:2005 — (Surge) ±1 kV signal ports;EN61000-4-6:2006 — (CI) 10 VRMS, 0.15 to 80 MHz;EN61000-4-8:2001 — (Magnetic) 10 A/m, 50 Hz and 60 Hz;
Shock IEC60068-2-27 — 50G peak, 11 ms, 3 axis
Vibration IEC60068-2-6 — 10 to	500 Hz, 4G, 3 axis
Freefall (drop) IEC60068-2-32 —	10 total drops from sides, corner and edges; 1 M

UL Class 1, Div. 2

Suitable for use in Class 1, Division 2, Groups A, B, C, and D Hazardous Locations, or Nonhazardous locations only.

WARNING — EXPLOSION HAZARD — DO NOT DISCONNECT EQUIPMENT WHILE THE CIRCUIT IS LIVE UNLESS THE AREA IS KNOWN TO BE FREE OF IGNITABLE CONCENTRATIONS.

Install in accordance with control drawing number 9340R0

Ind. Cont. Eq.

For HAZ LOC

3HTV

E245548

Class 1, Div. 2, Groups A, B, C, & D

Temp. Code: T4

1.3 Basic Default Settings
Serial Interface RS-232 (both DIP	switches OFF)
Bits per second 9600
Data bits 8
Parity None
Stop Bits 1
Flow Control None
COM Port	First available over COM port 4
1.4 Advanced Default Settings
USB Transfer Size —Receive 4096 bytes (max.)
USB Transfer Size — Transmit 4096 bytes (max.)
Latency Timer 16
Minimum Read Timeout 0
Minimum Write Timeout 0
Serial Enumerator On
Serial Printer Off
Cancel If Power Off Off
Event On Surprise Removal Off
Set RTS on Close Off
Disable Modem Ctrl at Startup Off

1.5 Dimensional Diagrams

Figure 1-1. ICD120A dimensions.

Technical diagram of a network device showing front, top, and side views with labeled dimensions and ports.

Figure 1-2. ICD140A dimensions.

6.03 5.44 USB Host P1 P2 P1 P2 TX RX 232 485 2W 422 485 4W PORT 1 PORT 2 6.67

Figure 1-3. ICD120A panel mount dimensions.

USB Host P1 P2 P3 P4 1X Port 1 Port 2 Port 3 Port 4 9.27 8.62 8.01

Figure 1-4. ICD140A panel mount dimensions.

2. Overview

2.1 Description

The Industrial Isolated Converters enable any host USB port to provide multiple RS-232, RS-422 or RS-485 two or four-wire serial interfaces. The ICD120A provides two ports; the ICD140A provides four ports.

These converters support USB 2.0 high speed data rates of 480 Mbps. The upstream and downstream sections are isolated to 2000 volts. Industrial features include a rugged metal case, versatile mounting options, high ESD protection, wide temperature ranges, and high-retention USB connectors.

2.2 Features

• Easy to install
  • 2 kV port-to-port isolation
  • High retention USB connector
• Rugged metal case
  • DIN rail or panel mount options included
• 8 kV contact, 15 kV air ESD surge protection
• Wide temperature range (-40 to +176° F [-40 to +80° C])
  • USB 2.0 and 1.1 compatible
  • LEDs indicate power and port status
• Includes 2 meter USB cable
• USB powered (USR602 only) or externally powered
• Drivers for Windows 2000 and up (including 64-bit variants)
  • RS-232, RS-422, RS-485 two-wire and RS-485 four-wire interfaces
• Modbus support
• 2 or 4 port models

- Redundant power inputs (10 to 48 VDC) via terminal block or locking barrel jack

2.3 What's Included

Your package should include the following items. If anything is missing or damaged, contact Black Box Technical Support at 724-746-5500 or [e-mail].

• (1) Industrial Isolated Converter, 2-Port (ICD120A) or Industrial Isolated Converter, 4-Port (ICD140A)
• (1) 6.4-ft. (2-m) USB cable
• (2) brackets and (4) screws for panel mounting
• DIN rail mount adapter
- Quick Start Guide

This user manual/installation guide can be downloaded from the Black Box Web site.

To download from the Web site:

1. Go to www.blackbox.com

2. Enter the part number in the search box:

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1. Click on the "Resources" tab on the product page, and select the document you wish to download.

If you have any trouble accessing the Black Box site to download the manual, you can contact our Technical Support at 724-746-5500 or [e-mail].

2.4 Hardware Description

2.4.1 Industrial Isolated Converter, 2-Port (ICD120A)

Figure 2-1 shows the ICD120A. Table 2-1 describes its components.

Power + - m C-C + 1 2 USB Host P1 P2 P1 P2 Pwr TX RX 232 485 2W 422 485 4W PORT 1 PORT 2 BLACK BOX® www.blackbox.com

Figure 2-1. ICD120A.

Table 2-1. ICD120A components.
Number in Figure 2-1 Component Description
1 3-pin terminal jack Used for power
2 Barrel jack Used for power
3 USB Type B connector Links to USB host
4	DIP switches	Used to configure serial ports for RS-232, RS-422, RS-485 (4-wire), or RS-485 (2-wire) operation:Switches 1 and 2 configure Port 1;Switches 3 and 4 configure Port 2
5	LEDs	(4) LEDs: P1 TX, P1 RX, P2 TX, P2 RX
6	(2) DB9 male connectors	Links to serial devices

2.4.2 Industrial Isolated Converter, 4-Port (ICD140A)

USB Host P1 P2 P3 P4 TX Per RX PORT 1 PORT 2 PORT 3 PORT 4 BLACK BOX

Figure 2-2. ICD140A.

Table 2-2. ICD140A components.
Number in Figure 2-2 Component Description
1 DIP switches Used to configure serial ports for RS-2		32, RS-422, RS-485 (4-wire),or RS-485 (2-wire) operation:Switches 1 and 2 configure Port 1;Switches 3 and 4 configure Port 2
2 3-pin terminal jack Used for power
3 Barrel jack Used for power
4 USB Type B connector	Links to USB host
5 LEDs (4) LEDs: P1 TX, P1 RX, P2 TX, P2 RX
6 (2) DB9 male connectors	Links to serial devices

2.5 Typical Applications/Modes of Operation

• Add serial ports to PCs
• Convert USB serial connection to:
• RS-232
• RS-422
• RS-485 two-wire
• RS-485 four-wire

3. Quick Start Guide

What's Included

Before you begin, make sure you have the following items:

• (1) ICD120A or ICD140A
• (1) 6.4-ft. (2-m) USB cable
• (2) brackets and (4) screws for panel mounting
• DIN rail mount adapter

Installation Steps

STEP 1: Install the drivers.

NOTE: To prevent installation errors, do not plug in the hardware until you have already installed the drivers.

Download the converter's drivers from:

http://www.ftdichip.com/Drivers/VCP.htm

and install them on the attached PC.

STEP 2: Set DIP Switches.

Refer to the tables below and the following illustrations.

Table 3-1. DIP switches on the ICD120A.
DIP Switch	SW #	RS-232	RS-422	RS-4854-Wire	RS-4852-Wire
Port 1	1	OFF	ON	OFF	ON
	2 OFF ON	ON OFF
Port 2	3	OFF	ON	OFF	ON
	4 OFF ON	ON OFF

USB port DIP switches LEDs Port 1 and Port 2 DB9 M connectors USB Host PI. 12 PI. 20 PORT 1 PORT 2 3-pin terminal block and barrel jack for power

Table 3-2. DIP switches on the ICD140A.
DIP Switch	SW #	RS-232	RS-422	RS-4854-Wire	RS-4852-Wire
Port 1	1	OFF	ON	OFF	ON
	2 OFF ON	ON OFF
Port 2	3	OFF	ON	OFF	ON
	4 OFF ON	ON OFF
Port 3	5	OFF	ON	OFF	ON
	6 OFF ON	ON OFF
Port 4	7	OFF	ON	OFF	ON
	8 OFF ON	ON OFF

LEDs USB port Ports 1-4 DB9 M connectors DIP switches 3-pin terminal block and barrel jack for power

STEP 3: Power the Converter.

The ICD120A can run on 5 V USB power if the host port is providing 500 mA. It can also be powered via the terminal block or barrel jack port.

STEP 4: Connect the Converter.

When you connect the converter to the host computer's USB port, the Found New Hardware wizard will open. It will discover and install the USB device. Then it will discover and install each serial port. Allow Windows to install the converter "Automatically." There is no need to connect to the Internet or Windows Update.

If a popup window says the software has not passed Windows logo testing, that's OK. Just click on "Continue Anyway."

When the wizard is complete, the serial ports on the converter will appear in Windows Device Manager as new COM ports.

STEP 5: Configure the Serial Ports.

Open Control Panel. Click "System" to open the Device Manager. Under "Ports," double-click the port to be configured.

On the “Serial Port Properties” window, set the required communications parameters for the system with which you are communicating. If necessary, click Advanced and set up the Advanced Properties. (Refer to the user manual for more information.)

To download the user manual from the Black Box Web site:

1. Go to www.blackbox.com
2. Enter the part number (ICD120A) in the search box:
3. Click on the "Resources" tab on the product page, and select the document you wish to download.

STEP 6: Loopback Test.

Set the converter to RS-232 mode using the DIP switches. Loopback pins 2 and 3. Using HyperTerminal or a similar program, connect to the COM port. Set the desired baud rate. Ensure that HyperTerminal local echo is OFF. Transmit data. If the same character string is returned, the test is good.

STEP 7: LEDs.

Type Indication when ON

PWR Computer is receiving adequate voltage and current from USB or power source.

TX Serial interface is transmitting data.

RX Serial interface is receiving data.

4. Software Installation

CAUTION: Do not connect the converter to your PC until the driver is installed. Download the driver from www.blackbox.com. It is installed using an executable program. This program must be run on your PC before connecting the converter to your USB port.

4.1 Installing the Driver

Download the driver from http://www.ftdichip.com/Drivers/VCP.htm The driver installation software should automatically start. If not, double-click on the "setup.exe" file. The following dialog box will appear.

ICD120A Driver Installer Welcome to the ICD120A and ICD140A driver installer! This program will install the drivers for the ICD120A or ICD140A device. To continue, click Next.

Figure 4-1. Run setup.exe dialog.

1. Click Next. The license agreement dialog box will appear.

ICD120A Driver Installer End User License Agreement To continue, accept the following license agreement. To read the entire agreement, use the scroll bar or press the Page Down key. PURCHASE AND LICENSE AGREEMENT OF CUSTOM SOFTWARE PROGRAM This agreement is entered into prior to this installation (the "Execution Date") between Black Box Corporation and User of Software (herein referred to as "USER." 1. CERTAIN DEFINITIONS I accept the license agreement Save As Print I do not accept the license agreement < Back Next > Cancel

Figure 4-2. End User License Agreement.

1. Click Next. The program will install the drivers on your computer and the installation complete screen will appear.

ICD120A Driver Installer Congratulations! You are finished installing the drivers for the ICD120A or ICD140A device. The drivers were successfully installed on this computer. You can now connect your device to this computer. If your device came with instructions, please read them first. Driver Name Status ✓ FTDI CDM Driver Packa... Ready to use ✓ FTDI CDM Driver Packa... Ready to use < Back Finish Cancel

Figure 4-3. Installation Complete Screen.

1. When the installation is complete, you can plug in the USB to Serial Converter. When you do this, the COM ports will be assigned. It may take up to 30 seconds to assign the COM ports the first time you plug in the converter.
2. The driver software is now installed.
3. To verify that the communication port has been configured:

a. Open the Control Panel.
b. Click System to open the System Properties dialog box.
c. Select the Hardware tab.
d. Click Device Manager to open the Device Manager dialog box.
e. Expand Ports (COM & LPT). USB Isolated Serial Port should be listed as one of the COM ports.

4.2 Un-Installing the Driver

To un-install the driver for the ICD120A or ICD140A converter:

1. Open the Control Panel.
2. Click System to open the System Properties dialog box.
3. Select the Hardware tab.
4. Click Device Manager to open the Device Manager dialog box.

5. Expand Ports (COM & LPT). USB Isolated Serial Port should be listed as one of the COM ports.

6. Right-click the COM port listing for the converter (USB Isolated Serial Port). The following dialog box appears.

Confirm Device Removal USB Isolated Serial Port (COM7) Warning: You are about to uninstall this device from your system. OK Cancel

Figure 4-4. Confirm Device Removal screen.

1. Click OK.

The Com port listing for the converter disappears.

5. Hardware Installation

Hardware installation includes mounting the device, connecting power, connecting to a PC, connecting to serial devices, and configuring the serial ports. LEDs indicate the presence of power and communications signals on the ports.

5.1 Installing and Mounting the ICD120A or ICD140A

ICD120A and ICD140A converters are supplied with DIN rail mounting clips and panel mount adapters.

Blue rectangular object with a black panel and metallic clasp, no visible text or symbols

Figure 5-1. DIN Rail Mounting Clip.

The DIN rail mounting clip is attached to the back of the unit using three machine screws (included). This mount enables the unit to be clipped directly to a standard DIN rail.

USB Host PWT 232 0.0 422 0.0 P1 P2 ON P1 P2 TX RX 485 2W 485 4W PORT 1 PORT 2

Figure 5-2. ICD120A with Panel Mount Adapters.

Panel mount adapters are attached to the unit with three machine screws on each side. With this mount the unit can be installed in a panel. (Refer to the dimensional diagrams in Chapter 1 for the dimensions required for pre-drilling the panel.)

5.2 Connecting Power

ICD120A and ICD140A converters offer three options for connection of power:

• USB bus powered
• External power via pluggable terminal strip — 10 to 48 VDC, 16 watts max.
• External power via locking power jack — 10 to 48 VDC, 16 watts max.

Power + - ∂ ⊖ ⊕ ⊕

Figure 5-3. Power Supply Connections on the ICD120A.

When the unit is USB powered, the current available to the converter may be limited by the USB host. If the converter is connected to an external USB hub, the maximum available current may be insufficient to operate the converter. In that case, connect an external power supply.

5.3 Connecting to a PC

ICD120A and ICD140A converters connect to a host device (PC) via a USB interface. The connector on the converter is a high-retention force Type B female connector.

Figure 5-4. USB Connector.

5.4 Connecting to the Serial Ports

The ICD120A has two serial ports; the ICD140A has four. DB9 M connectors are used for RS-232, RS-422, and RS-485 two-wire and four-wire connections.

Close-up of two USB port connectors labeled PORT 1 and PORT 2 (no additional text or symbols visible)

Figure 5-5. DB9 M Serial Port Connectors.

The following illustration shows the pin numbering of the DB9 M connector.

1 2 3 4 5 6 7 8 9

Figure 5-6. DB9 F Pin Numbering.

The following table shows the wiring pin-outs for RS-232, RS-422 and RS-485 two-wire and four-wire connections.

Table 5-1. DB9 F wiring pinouts.
Pins	RS-232 (DTE)	RS-422/RS-485 (4-wire)	RS-485 (2-wire)
1	Data Carrier Detect (DCD)	RDA(-)	—
2 Receive Data (RD) RDB(+) —
3	Transmit Data (TD)	TDB(+)	DATA B(+)
4	Data Terminal Ready (DTR)	TDA(-)	DATA A(-)
5 Signal Ground (GND) GND		GND
6 Data Set Ready (DSR) —		—
7	Request to Send (RTS)	—	—
8	Clear to Send (CTS)	—	—
9	Not Used	—	—

5.5 Termination and Biasing

ICD120A and ICD140A converters include internal biasing resistors on the RS-422/RS-485 interfaces.

The values for internal biasing resistors are:

Biasing: 1k ohms (default IN PLACE when in RS-422/485 modes)

The biasing resistors are connected to the receive lines, pulling the RDA(-) line to ground and the RDB(+) line to a positive voltage. The bias resistor is automatically IN when you select RS-422/485 mode.

5.6 Setting COM Port Operating Modes

The operating modes of the converter are configured by the positions of DIP switches accessible on the ICD120A or ICD140A enclosure. The DIP switches on the ICD120A are located on the front panel of the converter.

• Switches 1 and 2 configure Port 1
• Switches 3 and 4 configure Port 2

P1 P2 P1 Pwr CT5 806-4 TX 232 485 2W 422 485 4W

Figure 5-7. DIP Switches on the ICD120A.

Table 5-2. DIP switch settings on the ICD120A.
DIP Switch	SW #	RS-232	RS-422	RS-4854-Wire	RS-4852-Wire
Port 1	1	OFF (down)	ON (up)	OFF (down)	ON (up)
	2 OFF (down) ON (up) ON (up) OFF (down)
Port 2	3	OFF (down)	ON (up)	OFF (down)	ON (up)
	4 OFF (down) ON (up) ON (up) OFF (down)

The DIP switches on the ICD140A are located on the top of the enclosure near the power connectors (when the unit is positioned vertically).

• Switches 1 and 2 configure Port 1
• Switches 3 and 4 configure Port 2
• Switches 5 and 6 configure Port 3
• Switches 7 and 8 configure Port 4

0N 1 2 3 4 5 6 7 8 DIP

Figure 5-8. ICD140A DIP Switch and Power Connectors.

Operating modes are RS-232, RS-485 two-wire half-duplex, RS-485 four-wire full-duplex, and RS-422.

Table 5-3. DIP switch settings on the ICD140A.
DIP Switch	SW #	RS-232	RS-422	RS-485 4-Wire	RS-485 2-Wire
Port 1	1	OFF (down)	ON (up)	OFF (down)	ON (up)
	2 OFF (down)	ON (up) ON	(up) OFF (down)
Port 2	3	OFF (down)	ON (up)	OFF (down)	ON (up)
	4 OFF (down)	ON (up) ON	(up) OFF (down)
Port 3	5	OFF (down)	ON (up)	OFF (down)	ON (up)
	6 OFF (down)	ON (up) ON	(up) OFF (down)
Port 4	7	OFF (down)	ON (up)	OFF (down)	ON (up)
	8 OFF (down)	ON (up) ON	(up) OFF (down)

5.7 LED Indicators

ICD120A converters include five LED indicators; ICD140A converters include nine LED indicators. In both models, one indicates the presence of power; the others indicate transmit and receive data present on each port.

Pw P1 P2 1 2 3 4 015 266-8 P1 P2 TX RX 232 485 2W 422 485 4W

Figure 5-9. ICD120A LED Indicators.

Figure 5-10. ICD140A LED Indicators.

Table 5-4. LED indicators on the ICD120A and ICD140A.
LED Function Color Indicates
Power	Green	Presence of power
Port 1 RX	Blinking green	Data is being received on Port 1
Port 1 TX	Blinking yellow	Data is being transmitted on Port 1
Port 2 RX	Blinking green	Data is being received on Port 2
Port 2 TX	Blinking yellow	Data is being transmitted on Port 2
Port 3 RX	Blinking green	Data is being received on Port 3
Port 3 TX	Blinking yellow	Data is being transmitted on Port 3
Port 4 RX	Blinking green	Data is being received on Port 4
Port 4 TX	Blinking yellow	Data is being transmitted on Port 4

6. Advanced User Settings

Serial port parameters and other advanced settings are configured on the USB Isolated Serial Port Properties and Advanced Settings windows, which are accessible via the Device Manager. The Device Manager can be accessed through the Windows® Control Panel.

Device Manager File Action View Help Computer 1 + Batteries + Computer + Disk drives + Display adapters + DVD/CD-ROM drives + Human Interface Devices + IEEE 1394 Bus host controllers + Imaging devices + Keyboards + Mice and other pointing devices + Modems + Monitors + Network adapters + Ports (COM & LPT) + Communications Port (COM1) + USB Isolated Serial Port (COM5) + Processors + SCST and RAID controllers + Sound, video and game controllers + System devices + Universal Serial Bus controllers

Figure 6-1. Device Manager.

6.1 Setting Serial Port Properties

1. In Device Manager, expand Ports and double-click USB Isolated Serial Port to open the USB Isolated Serial Port Properties dialog box.

USB Isolated Serial Port (COM5) Properties General Port Settings Driver Details Bits per second: 9600 Data bits: 8 Parity: None Stop bits: 1 Flow control: None Advanced... Restore Defaults OK Cancel

Figure 6-2. Port Properties.

1. In the dropdown lists provided, select the following serial port properties required for your communications application:

2. Bits per second

3. Data bits
4. Parity
5. Stop bits
6. Flow control

NOTE: The default values for this dialog are 9600 bps, 8 data bits, No parity, 1 stop bit, No flow control.

6.2 Advanced Settings in Device Manager

To configure advanced settings, on the USB Isolated Serial Port Properties dialog, click Advanced...

The Advanced Settings dialog appears.

Advanced Settings for COM5 COM Port Number: COM5 USB Transfer Sizes Select lower settings to correct performance problems at low baud rates. Select higher settings for faster performance. Receive (Bytes): 4096 Transmit (Bytes): 4096 8M Options Select lower settings to correct response problems. Latency Timer (msec): 16 Timeouts Minimum Read Timeout (msec): 0 Minimum Write Timeout (msec): 0 Miscellaneous Options Serial Enumerator Serial Printer Cancel If Power Off Event On Surprise Removal Set RTS On Close Disable Modem Ctrl At Startup

Figure 6-3. Advanced Settings.

Configure the advanced settings as required (refer to the following sections for details) and click OK to store the settings.

COM Port Number

When installing the drivers, the first available COM port number is assigned to the first COM port on the ICD120A or ICD140A device.

If necessary, the default communications port number can be changed by selecting a new number in the COM Port Number dropdown list.

USB Transfer Sizes

Receive and transmit message sizes between 64 bytes and 4096 bytes can be selected. The default value is 4096.

Select lower settings to correct performance problems at low baud rates. Select higher settings for faster performance.

BM Options

The BM Options dropdown list provides a setting for the Latency Timer. The latency timer is a form of time-out mechanism that counts from the last time data was sent from the ICD120A or ICD140A back to the PC. If the latency timer expires, the ICD120A or ICD140A will send any data it has available to the PC. It then resets and begins counting again.

Timer settings from 1 to 255 msecs are available. The default value is 16 msec.

Select lower settings to correct response problems.

Timeouts

The USB timeout is the maximum time in milliseconds that a USB request can remain outstanding. Minimum read and write timeout values between 0 and 10000 msec can be selected.

The default values are 0 for both read and write timeouts.

Miscellaneous Options

The following settings can be selected or deselected by clicking the appropriate checkbox:

• Serial Enumerator — The function of the serial enumerator is to detect a Plug-and-Play enabled device (such as a serial mouse or serial modem) that is attached to the USB serial port.
• Serial Printer — If enabled, serial printer will disable timeouts to allow for long delays associated with paper loading.
• Cancel If Power Off — The Cancel If Power Off option can be used to assist with problems encountered when going into a hibernate or suspend condition. This will cancel any requests received by the driver when going into hibernate or suspend.
• Event On Surprise Removal — The Event On Surprise Removal option is generally left unselected.
• Set RTS On Close — Selecting the Set RTS On Close option will set the RTS signal on closing the port.
• Disable Modem Ctrl At Startup — This option is used to control the modem control signals DTR and RTS at startup. Devices that monitor these signals can enter the wrong state after an unplug-replug cycle on USB.

6.3 Modbus Basics

Modbus is an industrial data communications protocol that emerged in the mid-1970s and continues to be widely used in current industrial systems. Originally designed to link terminals with Modicon PLCs, it is simple, easy to learn and implement, and free to use. It quickly became a defacto standard in the industry and has been widely implemented with successful results.

Modbus is a message-based master/slave protocol (also sometimes referred to as master/client) typically implemented across serial communications links such as RS-232, RS-422, and RS-485. It supports asynchronous point-to-point and multidrop communications.

The original Modbus specification included two possible transmission modes: ASCII and RTU. Modbus RTU mode is the most common implementation, using binary coding and CRC error-checking. Modbus ASCII messages (though somewhat more readable because they use ASCII characters) is less efficient and uses less effective LRC error checking. ASCII mode uses ASCII characters to begin and end messages whereas RTU uses time gaps (3.5 character times) of silence for framing. The two modes are incompatible so a device configured for ASCII mode cannot communicate with one using RTU.

Although some newer equipment using Modbus incorporates USB interfaces, most legacy equipment implements RS-232, RS-422, and RS-485. Most new PCs have eliminated RS-232 ports as standard features and RS-422/485 was never a standard feature. As a result USB to serial converters such as the ICD120A and ICD140A are often necessary to communicate between PCs and legacy systems that implement Modbus protocol.

Appendix A: Loopback Test and Serial Port Wiring

A.1 Loopback Test

To verify the operation of the USB to serial converter, perform a loopback test using the following procedure:

1. Connect the converter to the PC with a USB cable and install the driver using the procedure provided in the Software Installation section of this manual.

2. On the PC, open HyperTerminal (found in the Program files under Accessories/Communications).

Connection Description New Connection Enter a name and choose an icon for the connection: Name: Loopback Test Icon: OK Cancel

Figure A-1. Hyperterminal Connection Name.

1. Enter a connection name and click OK.

Connect To Loopback Test Enter details for the phone number that you want to dial: Country/region: United States (1) Area code: 815 Phone number: Connect using: COM6 OK Cancel

Figure A-2. Selecting the COM Port.

1. On the Connection using: dropdown list, select the port on the converter to be tested.
2. Click OK.

COM6 Properties Port Settings Bits per second: 2400 Data bits: 8 Parity: None Stop bits: 1 Flow control: None Restore Defaults OK Cancel Apply

Figure A-3. Setting the Port Settings.

1. On the Properties/Port Settings dialog, ensure Flow control is set to None.
2. Click OK.
3. Set the serial port to RS-232 mode by switching both associated DIP switches to Off.
4. Plug a loopback plug into the DB9 M connector associated with the serial port to be tested.

Figure A-4. Loopback plug.

1. Type some characters on the PC's keyboard. The characters should appear on the HyperTerminal window.

The loopback test is successful!

Figure A-4. Successful Hyperterminal Port Test.

1. Remove the loopback plug and type more characters. No additional characters should appear on the HyperTerminal window.

A.2 Serial Port Wiring

RS-232 Connections

Both devices are DTEs Set P1 for RS-232 (1 & 2 off) Pin 2 RD Pin 3 TD Serial Device with RS-232 Interface USB Host P1 P2 P1 P2 PORT 1 PORT 2 Per 1 2 3 4 RX 1 232 485.2W 422 485.4W

Figure A-6. ICD120A RS-232 Connections.

RS-485 Two-Wire Connections

Includes internal biasing resistors: Bias = 1.2 kohms (pull up & pull down) Set P2 for RS-485 2-wire (3 on, 4 off) USB Host P1 P2 P1 P2 Port 1 PORT 2 230 12 1 TX 422 485 2W 485 4W Two-wire RS-485 to other nodes DATA B(+) Pin 3 DATA A(-) Pin 4 GND Pin 5 Industrial Device with RS-485 2-wire interface

Figure A-7. ICD120A RS-485 Two-Wire Connections.

RS-422 and RS-485 Four-Wire Connections

For RS-485 4-wire: 3 off, 4 on For RS-22: 3 & 4 on Includes internal biasing resistors: Bias = 1.2 kohms (on TD lines, pull up & pull down) USB Host P1 P2 P1 P2 Port 1 Port 2 RS-422 or RS-485 4-wire to other nodes RDA(-) Pin 1 RDB(+) Pin 2 TDB(+) Pin 3 TDA(-) Pin 4 GND Pin 5 Industrial Device with RS-485 4-wire interface

Figure A-8. ICD120A RS-422/485 Four-Wire Connections.

Appendix B. Troubleshooting

One USB port is required for each installed device. The USB port can be native to the PC or it can be a USB port on a USB hub that is connected to a PC.

The device works with USB 1.1 or 2.0 ports. But it has a maximum USB data rate of 12 Mbps.

To verify the installation, you may open the Windows Device Manager. Scroll down to Ports. Expand the flyout window. You should see the new ports. If there are no exclamation points or other trouble indicators the ports are installed correctly and ready for use.

Sleep & Hibernate: Windows 7 disables USB transmit while in Sleep & Hibernate.

Terminal Block

• One conductor per terminal.
- Use copper wire only.
- Wire size 16 to 28 AWG.
- Tightening torque 5 KG -CM.

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ICD120A_ICD140A user manual version 2