Neets 312-0002 - Receiver

312-0002 - Receiver Neets - Free user manual and instructions

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Product Type Audio Amplifier (Receiver)
Model 312-0002
Output Power 2 x 25 Watt RMS (8 Ohm)
Speaker Impedance 8 Ohm
Audio Inputs 4 unbalanced line inputs (3.82mm screw blocks)
Input Level (Nominal) 0.316 VRMS (-10 dBV)
Channel Separation >90 dB
Input Impedance >15 kOhm
Total Harmonic Distortion <0.35% @ 25W (1-10 kHz), <0.1% @ 1W (1 kHz)
Efficiency Up to 90% (Class D)
Direct Button Control Input select, Mute, Volume (momentary, active low <0.2 VDC)
RS-232 Remote Control Port 1: 9600 baud, 8 data bits, 1 stop bit, no parity
RS-232 Loopthrough Port 2: supports external device control (1200-115200 baud)
SD Card Micro SD, max 1GB, FAT16 (for firmware upgrade)
Power Input (AC) 100-240 VAC, 47-63 Hz
Power Input (DC) 24 VDC, 2.5A regulated
Dimensions (without connectors) 70mm x 150mm x 40mm (2.7" x 5.9" x 1.6")
Weight (without PSU) 250g (0.5 lbs)
Operating Temperature 0°C to 45°C (non-condensing)
Storage Temperature -30°C to 70°C (non-condensing)

Frequently Asked Questions - 312-0002 Neets

How do I connect the Neets 312-0002 to a control system?
Connect the control system to RS-232 port 1 using a standard DB9 female cable wired as: pin 2 (Tx) to Rx, pin 3 (Rx) to Tx, pin 5 (GND) to GND. Set baud rate to 9600, 8 data bits, 1 stop bit, no parity.
Can I use the RS-232 loopthrough feature?
Yes. Connect the control system to RS-232 port 1 and an external device (e.g., projector) to RS-232 port 2. Configure the external device's baud rate via the Neets Product Configuration Software. The control system can then control both the amplifier and the external device through one COM port.
How do I update the firmware?
Download the firmware file (e.g., aud_0100.bin) from www.neets.dk. Copy it to the root of a Micro SD card (FAT16, max 1GB). Power off the amplifier, insert the SD card, then power on. Wait for the Input 1 LED to light and a 'light show' on Standby and Mute LEDs. Power off and on again to complete.
What are the input options?
The 312-0002 has 4 unbalanced line inputs on 3.82mm screw blocks. Input impedance is >15 kOhm, nominal level 0.316 VRMS (-10 dBV). Input selection is possible via front button or RS-232 command.
Is phantom power supported?
No. Phantom power (24 VDC) is only available on model 312-0003. The 312-0002 does not have a microphone input or phantom power capability.
What are the power requirements?
The amplifier accepts 100-240 VAC (47-63 Hz) via the included power supply or direct 24 VDC 2.5A. Use only a regulated 24VDC source if not using the AC adapter.
How do I control the amplifier via RS-232?
Send ASCII commands terminated with Carriage Return (0x0D). Example: set volume to 20: NEAMP1,VOL=20. The unit responds with NEAMP1,OK or NEAMP1,ERR. Refer to the protocol section in the manual for all commands.
What is the default IP address for LAN control?
The 312-0002 does not have LAN control. Only model 312-0003 supports Ethernet. The 312-0002 uses RS-232 exclusively.
How do I troubleshoot LED indications?
Refer to the 'Fault finding' table: Speaker output Shortcut (check cables and reboot), Firmware update done (reboot unit), No Micro SD Card found (reinsert card), No firmware (copy firmware to SD card and reinsert). Contact support for other errors.
Can I use the amplifier with 4 Ohm speakers?
The manual specifies 8 Ohm speaker impedance. Using 4 Ohm speakers may cause overheating or damage. Always match impedance to the rated value.

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USER MANUAL 312-0002 Neets

natural_image Abstract orange geometric logo with overlapping squares and a central black square (no text or symbols)

How does it work?

Foreword:

The purpose of this document is to describe how to install and configure the 3 versions of the Neets Audio Amplifier.

COPYRIGHT - All information contained in this manual is the intellectual property of and copyrighted material of Neets. All rights are reserved. You may not allow any third party access to content, information or data in this manual without Neets' express written consent.

CHANGES - Neets reserve the right to change the specification and functions of this product without any notice.

Questions, AFTER reading this manual, can be addressed to your local dealer or:

Neets A/S - DK-8700 Horsens

by E-Mail: Support@Neets.dk

or you may use our contact form at www.neets.dk

Revision list:

Author: DateDescriptionPages
TSA 21/01-09First release.All
TSA 06/06-09Small adjustments to make things more clear.13, 14
TSA 07/06-09Firmware upgrade done image, was wrong image.6
TSA 07/06-09Image and text on page changed.19
JML 23/06-09Added description of how to ask for current state and minor changes in examples.15,16
SDV 27/01-10Text added5
SDV 15/02-10New picturesAll
TSA 08/06-11Removed wake on signalAll
DB 13/12-11Contact information1

From serial number (and forward) there is no longer the possibility to use Wake on Signal:

312-0001: 110700050

312-0002: 100800450

312-0003: 090900091

Table of content

Foreword: 1

Revision list: 2

Table of content....3

Description: 4

What is class "D" amplifier?: 5

What is line level on our amplifier?: 5

Phantom power: 5

RS-232 cable connections: 5

RS-232 loopthru: 5

LAN to RS-232 loopthru: 5

Firmware upgrade of units: 6

Connections on units - 312-0001: 7

Left side: 7

Top end: 7

Right side: 7

Specifications 312-0001: 8

Connections on units - 312-0002: 9

Left side: 9

Top end: 9

Right side: 9

Specifications 312-0002: 10

Connections on units - 312-0003: 11

Left side:....11

Top end: 11

Right side:....11

Specifications 312-0003: 12

Special functions on 312-0003:.... 13

Amplifier Communications protocol 14

Admin audio 14

Input 1-4....14

Microphone....14

Admin 14

RS-232: 1 to 3....15

Global functions 15

Examples for use of the protocol 15

Examples for use of the protocol – continued 16

Application drawing 312-0001, 312-0002 and 312-0003....17

Application drawing 312-0002 and 312-0003 18

Application drawing 312-0003 19

Description:

The Neets Audio Amplifier version 1-3 are all intended for single room applications, they may be used for other things but the idea behind them is single room applications (ex. Class- or meeting-room).

All 3 versions are high performing class "D" amplifiers, and they can all be controlled over RS-232. Bellow you will find the specifications for the 3 models.

Neetsdk Interface Control GND F4V Power in GND Up Green Volume GND TX Rx RS-232 - 1 Mute Standley Mute Input 1 Input 2 Input 3 Input 1 Speaker Out + L + R Input 2 Input 3 Input 1 Output 3/10 dcm/0.01/0.05 DC VD Input select: SEL GND Mute: SEL GND Input select: R GND GND L Input 1: R GND GND L Input 2: R GND GND L Input 3: R GND L

Version 1

Neetsdk Industrial Concept GND 24V Power In GND up down Volume RS-232 - 1 Rx Tx Rx RS-232 - 2 Mute SEL GND Standby Mute Input 4 Input 3 Input 2 Input 1 Speaker out. Input 1 Input 2 Input 3 Input 4 Input 5 Output 1 Output 2 Output 3 Output 4 Output 5 Audio Amplifier Ver 2 P/N: 317-0002 Doc#: 317-0002 on our rev1

Version 2

neats.dk POWER 81 GND 24V GND/GND IP Tx Ground/UX GND/GND Tx Rx Tx Standby Mute Input 4 Input 3 Input 2 Input 1 + L + R Speaker out Balanced input GND R GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND/L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.L GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GND.I GNDI

Version 3

DescriptionPart number#:Version 1312-0001Version 2312-0002Version 3312-0003
Output power in 8 ohm RMS2*15 Watt2*25 Watt2*25 Watt
Class of operationDDD
Short circuit safe speaker outputsYesYesYes
Unbalanced line input (0.316 VRMS, -10dBV)343
Balanced line input (0.316 VRMS, -10dBV)001
Preamplifier out (Level control depending on volume settings)001
Microphone input (Phantom power possible 24VDC)001
Direct connection for Mute button (Active pulse < 0.2 VDC)YesYesYes
Direct connection for volume up/down (Active pulse < 0.2 VDC)YesYesYes
Direct connection for input selection (Active pulse < 0.2 VDC)YesYesYes
RS-232 ControlYesYesYes
RS-232 with loopthroughNoYesYes
LAN Loopthrough (LAN to RS-232)003
LAN controlNoNoYes
Homepage control (Thru web browser)NoNoYes
Channel selectYesYesYes
Channel preset gainYesYesYes
Channel preset BalanceYesYesYes
Channel preset BassYesYesYes
Channel preset TrebleYesYesYes
Master VolumeYesYesYes
Master BassYesYesYes
Master TrebleYesYesYes
MuteYesYesYes

What is class "D" amplifier?:

A switching amplifier or class-D amplifier is an electronic amplifier which, in contrast to the active resistance used in linear mode AB-class amplifiers, uses switching mode of transistor to regulate power delivery. The amplifier, therefore, features the high power efficiency (low energy losses), which additionally results in lower weight by eliminating the bulky heat sinks. Additionally, if voltage conversion is necessary, the on-the-way high switching frequency allows the bulky audio transformers to be replaced by small inductors. Low pass LC-filtering smoothes the pulses out and restores the signal shape on the load.

What is line level on our amplifier?:

Line level is a term used to describe the strength of an audio signal used to transmit analog sound information between audio components such as CD and DVD players, TVs, audio amplifiers, and mixing consoles, and sometimes MP3 players. In contrast to line level, there are weaker audio signals, such as those from microphones and instruments pickups, and stronger signals, such as those used to drive headphones and loudspeakers. The strength of the various signals does not necessarily correlate with the output voltage of a device; it also depends on the source's output impedance, or the amount of current available to drive different loads. The most common nominal level for consumer audio equipment is -10 dBV (0,316 V _RMS ), and the most common nominal level for professional equipment is 4 dBV.

Phantom power:

Phantom power (labeled as +48 V on some audio equipment - also +12 V or +24 V in some applications) is a method that sends a DC electrical voltage through microphone cables. It is best known as a common power source for condenser microphones, though many active DI boxes also use it. In Neets Audio Amplifier version 3 we use 24 V _DC as phantom power.

RS-232 cable connections:

To connect the Audio Amplifier you must wire the RS-232 cable as shown here to the right. This is a Female 9 pin SUB-D connector, what will fit into a standard computer RS-232 port, or any USB to RS-232 converter.

PIN 5 <-> GND PIN 3 <-> Rx PIN 2 <-> Tx

RS-232 loopthru:

312-0002 and 312-0003 has the possibility to make

"RS-232 loopthru" by this means, if the audio amplifier is connected to one of Neets Control systems (all systems except Neets Control QueBec) you will get an "extra" RS-232 port.

You control the audio amplifier thru RS-232 port 1 (connect this port to the control system), and you can connect (e.g. a projector) to RS-232 port 2 on the audio amplifier. When doing so and setting the system correct up in the "Neets Product Configurations Software" you will be able to control the audio amplifier and the projector from one (1) comport on the control system.

Please be aware that the first time you set up the system with a Neets Control system, the power must be connected to the Neets Control system AFTER the Audio Amplifier.

LAN to RS-232 loopthru:

The 312-0003 has the possibility to make “LAN to RS-232 loopthru” by this means that if you use our control system Neets Control – EU, professional (P/N#: 307-0002) and you connect both the Audio amplifier and the Neets Control – EU, professional to a LAN network, you will get additional 3 RS-232 ports to control external devices (located on the audio amplifier). So by using this function you will, on the Neets Control – EU, professional get in total 5 RS-232 ports, and on top of that have control over the audio amplifier.

Firmware upgrade of units:

This section describes how to firmware upgrade the units. On 312-0003 you can upgrade the unit by using the homepage (go to [maintenance] page and use the upgrade firmware). On all units you can use the procedure as bellow.

First you need to go to www.neets.dk and find the newest version (or the version you want). The filename of the firmware are "aud_0100.bin" for version 1.00 (version 2.03 will be named "aud_0203.bin").

Then you need to have a Micro SD to USB converter, you can get those from the internet (search google for "buy micro SD to USB converter" they cost from 10EUR) or by contacting Neets or you local distributor.

  • When you have the correct firmware and a converter to copy the file to the Micro SD card from your computer you are ready to firmware upgrade you unit.
  • First you MUST disconnect the power from the audio amplifier.
  • Then remove the SD Card from the unit by pushing the SD Card gently into the unit about 1mm (either by using your finger tips or a flat screwdriver) and then let go and it will slide out.
  • Place the Micro SD card into the adapter (e.g. USB adapter).
  • Connect the adapter to your computer.
  • Browse to the root of the folder of you SD card (e.g.: L:) and copy the file you have downloaded to the root folder (in this case "aud_0100.bin"). Please make sure that you do not delete anything else from the card.

Mytbar disk (L): Funktioner Hjælp Visninger Abn E-mail Braend :k Drive (J:) e (K:) [L:] rver01) (R:) Navn Endringsdato Type system web aud_0100.bin aud_0100.bin

Neets 312-0002 - Firmware upgrade of units: - 2

  • Use safe way of removing the Micro SD card from your computer.
  • Insert the Micro SD card to the unit (while power still is off)
  • Connect power
  • Wait for LED to indicate "firmware done" (see the picture here to the right for LED indication). Input 1 will light up, while Standby and mute will make "light show"
  • Disconnect power and reconnect power. YOU ARE DONE...!

REMEMBER to remove power from unit before removing Micro SD card!

How to remove the SD-Card

1.0x MDCO Kingston

SD Card insert to computer
Home Storage 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 4000 4100 4200 4300 4400 4500 4600 4700 4800 4900 5000 5100 5200 5300 5400 5500 5600 5700 5800 5900 6000 6100 6200 6300 6400 6500 6600 6700 6800 6900 7000 7100 7200 7300 7400 7500 7600 7700 7800 7900 8000 8100 8200 8300 8400 8500 8600 8700 8800 8900 9000 9100 9200 9300 9400 9500 9600 9700 9800 9900 1000

Firmware upgrade done..!

Connections on units - 312-0001:

Left side:

NumberDescription
1:Power in
2:Volume control
3:RS-232 control port
4:Standby LED
5:Mute LED
6:Input 3 LED
7:Input 2 LED
8:Input 1 LED
9:Right speaker
10:Left speaker

NEU 1 - Power in GND 24V GND up down GND Rx -90232-1 Standby Multi Input 3 Input 2 Speaker on Input 1 + - L + - 4 5 6 7 8 PWR 210-001 Audio Amplifier in max: 210-001 Output: 210-001

Top end:

NumberDescription
11:Micro SD-Card

11 Neetask SE Power in Input select - GND SF Muts - GND GND Volume 2k RS-332 - 1 GND 1x 1k 2k GND 2k 20000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 Interselect Control

Right side:

NumberDescription
12:Line Input 3
13:Line Input 2
14:Line Input 1
15:Input select switch
16:Mute input
17:Input select

12 13 15 16 17 Input 1 Input 2 Input 3 Input 4 Input 5 Input 6 Input 7 Input 8 Input 9 Input 10 Input 11 Input 12 Input 13 Input 14 Mole GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GSD

Specifications 312-0001:

Output (speakers):

Power (@ 8 ohm):2 * 15 Watt
Connections (2 pcs.):2 pin 3.81mm screw block
Speaker impedance:8 ohm (Ω)
THD+N @ 25 Watt 8 ohm:< 0.25% (@1KHz - 10KHz)
THD+N @ 1 Watt 8 ohm:< 0.1% (@1KHz)
Output efficiency:up to 90%

Audio inputs:

Unbalanced inputs:3
Connectors:3 pin 3.82mm screw block
Input level (all inputs):0VRMS-2VRMS Nominal:
0.316 VRMS (-10dBV)
Channel separation:>90 dB
Input impedance:>15 K ohm (Ω)

Direct buttons control

Buttons functions:Input sel, Mute, Volume
Button mode:Momentary
Activation of button:Low < (GND + 0.2 VDC)

RS-232 Remote Control

Control connected to:RS-232-1
Baud rate:9600
Data bits:8
Stop bits:1
Parity:None
Protocol:Neets

SD-Card (Storage card)

Type:Micro – SD, Standard type
Card:Max size 1GB
File system:FAT 16

General

Power input (AC):100 – 240 VAC (47-63 Hz)
Power input (DC):24 VDC 2.5A (Regulated)
Storage temperature:-30°C to 70°C (Non condensing)
Operating temperature:0°C to 45°C (Non condensing)
Dimension (without connectors):70mm (2.7") x 150mm (5.9") x 40mm (1.6")
Weight (no PSU):250gramm (0.5 lbs)
Weight (Shipping):1000g (2.2 lbs)

Connections on units - 312-0002:

Left side:

NumberDescription
1:Power in
2:Volume control
3:RS-232 control port 1
4:RS-232 control port 2
5:Standby LED
6:Mute LED
7:Input 4 LED
8:Input 3 LED
9:Input 2 LED
10:Input 1 LED
11:Right speaker
12:Left speaker

Top end:

NumberDescription
13:Micro SD-Card

NEPS 1 2 3 4 11 12 5 6 7 8 9 10

13 NBDSK 2kV - Power in Volume Input select - GND TELE SF0 SF1 TOVIP Power GND GND - M5-232 - 1 M5-232 - 2 M5-232 - 3 M5-232 - 4 M5-232 - 5 M5-232 - 6 M5-232 - 7 M5-232 - 8 M5-232 - 9 M5-232 - 10 M5-232 - 11 M5-232 - 12 M5-232 - 13 M5-232 - 14 M5-232 - 15 M5-232 - 16 M5-232 - 17 M5-232 - 18 M5-232 - 19 M5-232 - 20 M5-232 - 21 M5-232 - 22 M5-232 - 23 M5-232 - 24 M5-232 - 25 M5-232 - 26 M5-232 - 27 M5-232 - 28 M5-232 - 29 M5-232 - 30 M5-232 - 31 M5-232 - 32 M5-232 - 33 M5-232 - 34 M5-232 - 35 M5-232 - 36 M5-232 - 37 M5-232 - 38 M5-232 - 39 M5-232 - 40

Right side:

NumberDescription
14:Line Input 4
15:Line Input 3
16:Line Input 2
17:Line Input 1
18:Input select switch
19:Mute input
20:Input select

15 14 16 19 20 Needsat 17 18

Specifications 312-0002:

Output (speakers):

Power (@ 8 ohm):2 * 25 Watt
Connections (2 pcs.):2 pin 3.81mm screw block
Speaker impedance:8 ohm ( )
THD+N @ 25 Watt 8 ohm:< 0.35% (@1KHz - 10KHz)
THD+N @ 1 Watt 8 ohm:< 0.1% (@1KHz)
Output efficiency:up to 90%

Audio inputs:

Unbalanced inputs:4
Connectors:3 pin 3.82mm screw block
Input level (all inputs):0VRMS-2VRMS Nominal:0.316 VRMS (-10dBV)
Channel separation:>90 dB
Input impedance:>15 K ohm ( )

Direct buttons control

Buttons functions:Input sel, Mute, Volume
Button mode:Momentary
Activation of button:Low < (GND + 0.2 VDC)

RS-232 Remote Control

Control connected to:RS-232-1
Baud rate:9600
Data bits:8
Stop bits:1
Parity:None
Protocol:Neets

RS-232 loopthru:

External device:
Baud rates:1200 – 115200 bits/sec
Parity:Even, Odd, None
Data bits:7 – 8
Stop bits:1, 1 12 , 2
Other information:
Control connected to:RS-232-1
Device connected to:RS-232-2
Control possible to use:All Neets (minus: Neets Control QueBec)

SD-Card (Storage card)

Type:Micro – SD, Standard type
Card:Max size 1GB
File system:FAT 16

General

Power input (AC):100 – 240 VAC (47-63 Hz)
Power input (DC):24 VDC 2.5A (Regulated)
Storage temperature:-30°C to 70°C (Non condensing)
Operating temperature:0°C to 45°C (Non condensing)
Dimension (without connectors):70mm (2.7") x 150mm (5.9") x 40mm (1.6")
Weight (no PSU):250gramm (0.5 lbs)
Weight (Shipping):1000g (2.2 lbs)

Connections on units - 312-0003:

Left side:

NumberDescription
1:Power in
2:Volume control
3:RS-232 control port 3
4:RS-232 control port 2
5:RS-232 control port 1
6:Standby LED
7:Mute LED
8:Input 4 LED
9:Input 3 LED
10:Input 2 LED
11:Input 1 LED
12:Left speaker
13:Right speaker
14:Preamplifier out

Top end:

NumberDescription
15:Micro SD-Card

1 2 3 4 5 12 13 14 6 7 8 9 10 11 GND 13.5x-4 GND 13.5x-4 GND 13.5x-4 GND 13.5x-4 GND 13.5x-4 GND 13.5x-4 GND 13.5x-4 GND 13.5x-4 GND 13.5x-4 GND 13.5x-4

15 GND Power input RESISTANCE CANDR-201 SELE GND Power input RESISTANCE CANDR-201 SELE GND Power input RESISTANCE CANDR-201 SELE GND Power input RESISTANCE CANDR-201 SELE GND Power input RESISTANCE CANDR-201 SELE GND Power input RESISTANCE CANDR-201 SELEG GND Power input RESISTANCE CANDR-201 SELEG GND Power input RESISTANCE CANDR-201 SELEG GND Power input RESISTANCE CANDR-201 SELEG GND Power input RESISTANCE CANDR-201 SELEG GND Power input RESISTANCE CANDR-201 SELEC GND Power input RESISTANCE CANDR-201 SELEC GND Power input RESISTANCE CANDR-201 SELEC GND Power input RESISTANCE CANDR-201 SELEC GND Power input RESISTANCE CANDR-201 SELEC GND Power input RESISTANCE CANDR-201 SELC GND Power input RESISTANCE CANDR-201 SELC GND Power input RESISTANCE CANDR-201 SELC GND Power input RESISTANCE CANDR-201 SELC GND Power input RESISTANCE CANDR-201

Right side:

NumberDescription
16:Balanced line Input 4
17:Microphone input
18:Line Input 3
19:Line Input 2
20:Line Input 1
21:Input select switch
22:LAN (network) connector
23:Mute input
24:Input select

16 17 19 22 23 24 18 20 21

Specifications 312-0003:

Output (speakers):

Power (@ 8 ohm):2 * 25 Watt
Connections (2 pcs.):2 pin 3.81mm screw block
Speaker impedance:8 ohm ( )
THD+N @ 25 Watt 8 ohm:< 0.35% (@1KHz - 10KHz)
THD+N @ 1 Watt 8 ohm:< 0.1% (@1KHz)
Output efficiency:up to 90%

Audio inputs:

Unbalanced inputs:3
Connectors:3 pin 3.82mm screw block
Balanced inputs:1
Connectors:5 pin 3.82mm screw block
Input level (all inputs):0VRMS-2VRMS Nominal:0.316 VRMS (-10dBV)
Channel separation:>90 dB
Input impedance:>15 K ohm ( )

Audio output (preamp out)

Number of outputs:1
Connectors:3 pin 3.82mm screw block
Output level:0VRMS – 0.316 VRMS
Channel separation:>90 dB
Output impedance:<500 ohm (Ω)

Microphone input

Number of inputs:1
Phantom power:24 VDC
Input sensitivity:1.5mV/Pa to 5mV/Pa +/-3dB(Open circuit @ 1KHz)

RS-232 Remote Control

Control connected to:RS-232-1
Baud rate:9600
Data bits:8
Stop bits:1
Parity:None
Protocol:Neets

RS-232 loopthru:

External device:
Baud rates:1200 – 115200 bits/sec
Parity:Even, Odd, None
Data bits:7 – 8
Stop bits:1, 1 12 , 2
Other information:
Control connected to:RS-232-1
Device connected to:RS-232-2
Control possible to use:All Neets (minus: Neets Control QueBec)

Network (LAN)

Speed:10/100Mbit
Duplex:Half and full
DHCP:Default set to OFF
Default IP address192.168.254.252
Homepage address:80, non changeable
TCP Control port:5000, non changeable
Access RS-232-1 port:5010, non changeable
Access RS-232-2 port:5011, non changeable
Access RS-232-3 port:5012, non changeable

SD-Card (Storage card)

Type:Micro – SD, Standard type
Card:Max size 1GB
File system:FAT 16

General

Power input (AC):100 – 240 VAC (47-63 Hz)
Power input (DC):24 VDC 2.5A (Regulated)
Storage temperature:-30°C to 70°C (Non condensing)
Operating temperature:0°C to 45°C (Non condensing)
Dimension (without connectors):70mm (2.7") x 150mm (5.9") x 40mm (1.6")
Weight (no PSU):250gramm (0.5 lbs)
Weight (Shipping):1000g (2.2 lbs)

Special functions on 312-0003:

Homepage control:

The unit has the possibility to be controlled thru a homepage, simple go to the IP address of the unit in a web browser, and you will see the homepage as shown here.

You can either make changes that work immediately (e.g. volume up/down, input select) or you can make default settings. To change immediately changed settings to default, simple press the "Save as default" button in lower right hand corner.

Please remember the default IP address is 192.168.254.252, username and password is both "Admin" case sensitive.

Neets.dk http://192.168.10.98/ Audio Amplifier Neets.dk Master Input 1 Input 2 Input 3 Balanced Microphone Network Serial ports Maintenance Volume Bass Treble 2 0 0 L Balance R 4 Input select Input 1 Input 2 Input 3 Balanced Mute: Power: Mute Power On this page you can select e.g. input, master volume and bass. Note at any time you can press the "Save as default" button (in lower right hand corner), and then the settings you make will be standard every time you power on the unit. Save as default Neets: | Tanet 4 | 8700 | Horsens | Denmark | Phone: +45.75 666.099 | E-Mail: mail@Neets.dk

Fault finding:

Fault: Solution

LED indication on Audio amplifier:

Speaker output ShortcutCheck you speaker cable, and reboot unit. Have you been playing to loud?
Firmware update doneThere has been put new firmware on the unit. Please reboot unit
No Micro SD Card foundDid you remove the Micro SD card? Then insert it again.
Unexpected system errorPlease contact your distributor or Neets technical support.
No serial number in audio amplifierPlease contact your distributor or Neets technical support.
No firmware and no Micro SD card foundCopy firmware to Micro SD card and insert Micro SD card, and connect power
No firmware and no firmware on Micro SDCopy firmware to Micro SD card and insert Micro SD card, and connect power
Firmware upgradingWAIT, and do NOT disconnect power
Firmware upgradingWAIT, and do NOT disconnect power

Amplifier Communications protocol

RS-232 Remote Control port settings

RS-232 port:1
Baud rate:9600
Data bits:8
Stop bits:1
Parity:None
Protocol:As bellow

Network LAN port settings

TCP port:5000
Protocol:As bellow

Admin audio

DescriptionSyntaxDataRead/WriteDefault
Select input 1 – 4NEAMP1,INPUT=<data>1 – 4 (3 in 312-0001)R/W1
Set volumeNEAMP1,VOL=<data>0 – 51R/W0
Set bassNEAMP1,BASS=<data>-7 – 7R/W0
Set trebleNEAMP1,TREBLE=<data>-7 – 7R/W0
Set balanceNEAMP1,BAL=<data>-79 – 79R/W0
MuteNEAMP1,MUTE=<data>ON , OFFR/WOFF
Power state (When the amp are turned off it restores it defaults values)NEAMP1,POWER=<data>ON , OFFR/WOFF

Input 1-4

DescriptionSyntaxDataRead/WriteDefault
Preset input 1 – 4, bassNEAMP1,INPUT:,BASS=-7 – 7R/W0
Preset input 1 – 4, trebleNEAMP1,INPUT:,TREBLE =-7 – 7R/W0
Preset input 1 – 4, gainNEAMP1,INPUT:,GAIN=0 – 15R/W0
Preset input 1 – 4, balanceNEAMP1,INPUT:,BAL=-79 – 79R/W0

Microphone

DescriptionSyntaxDataRead/WriteDefault
Microphone gainNEAMP1,MICGAIN=<data>0 – 63R/W25
Phantom powerNEAMP1,PHANTOMPOWER=<data>ON, OFFR/WOFF

Admin

DescriptionSyntaxDataRead/WriteDefault
Set amp IP addressNEAMP1,IPADDRESS=xxx.xxx.xxx.xxxR/W192.168.254.252
Set amp sub netNEAMP1,IPSUBNET=xxx.xxx.xxx.xxxR/W255.255.255.0
Set amp gatewayNEAMP1,IPGATEWAY=xxx.xxx.xxx.xxxR/W192.168.254.1
Select if DHCP are used or not.NEAMP1,IPDHCP=ON, OFFR/WOFF
Amp, SNNEAMP1,UNITSN=8 characterR
Amp, Username for homepageNEAMP1,WWWUSER=Max 8 characterR/WAdmin
Amp, Password for homepage.NEAMP1,WWWPSW=Max 8 characterR/WAdmin
LAN speed (F = Full duplex, H = Half duplex)NEAMP1,IPSPEED=10F, 10H, 100F, 100HR/W100F

RS-232: 1 to 3

DescriptionSyntaxDataRead/WriteDef.
Set the comport baudrateNEAMP1,COM:,BAUDRATE=1200,2400,4800,9600,14400,19200,38400,57600,115200R/W9600
Set the comport data bitNEAMP1,COM:,DATABIT=7, 8R/W8
Ser the comport parityNEAMP1,COM:,PARITY=NONE, ODD or EVENR/WNONE
Set the comport stop bitNEAMP1,COM:, STOPBIT =1 or 2R/W1

Global functions

DescriptionSyntaxDataRead/WriteDefault
Save the current settings as the default startup values.NEAMP1,SAVE=TRUEW
Restore factory defaults values for the entire system.NEAMP1,FACTORYDEFAULT=AUDIO, COM, LAN or ALL.W
Set all the values to their default (last saved).NEAMP1,RESET=AUDIO, COM, LAN or ALL.W

Neets 312-0002 - Amplifier Communications protocol - 1

All commands that are in a span (e.g. Set volume 0-51, Select input 1-4, or Set balance -79 – 79 and so on...) can be used with INC (increment 1) or DEC (decrement 1) commands. E.g. if the volume is 25 and you send NEAMP1, VOL=DEC then the volume will be 24.

When asking for a current state of a command simply replace the in the command with “?”. All the commands must be terminated with (0x0D in HEX value).

When a command is successful executed the amplifier retunes: NEAMP1, OK

If the commands that are sent are unknown the amplifier returns: NEAMP1,ERR

Examples for use of the protocol

Setup your RS-232 port to the following values:

• Baudrate: 9600
- Databits: 8
- Stopbits: 1
- Parity: None

E.g. for setting the audio amplifier to input 2 and gain for that input to 3

Set gain to 3 on input 2:

Send: NEAMP1,INPUT:2,GAIN=3

Response: NEAMP1,OK

Select the input 2 to be played:

Send: NEAMP1,INPUT=2

Response: NEAMP1,OK

E.g. ask for input gain on input 2:

Send: NEAMP1,INPUT:2,GAIN=?

Response: NEAMP1,OK,INPUT:2,GAIN=3

Examples for use of the protocol – continued

Here we will try to set up the audio amplifier to have some default parameters, turn on, mute on, mute off, and turn off again.

Default parameters:

  • Default input: Input 2
  • Default power: off
  • Default volume: 20

To set up above default parameters (and leave the rest factory default) send the following commands to the audio amplifier (NOTE: is the 0x0D HEX value for Carriage Return):

  • Send: NEAMP1,FACTORYDEFAULT=ALL
    • Response: NEAMP1,OK
  • Send: NEAMP1,INPUT=2
    • Response: NEAMP1,OK
  • Send: NEAMP1,POWER=OFF
    • Response: NEAMP1,OK
  • Send: NEAMP1, VOL=20
    • Response: NEAMP1,OK
  • Send: NEAMP1,SAVE=TRUE
    • Response: NEAMP1,OK

Now we want to turn on the unit, send the following commands to the audio amplifier (NOTE: is the 0x0D HEX value for Carriage Return):

  • Send: NEAMP1,POWER=ON
    • Response: NEAMP1,OK

Now we want to mute and on mute the audio amplifier, send the following commands to the audio amplifier (NOTE: is the 0x0D HEX value for Carriage Return):

  • Send: NEAMP1,MUTE=ON
    • Response: NEAMP1,OK

To get out of mute send:

  • Send: NEAMP1,MUTE=OFF
    • Response: NEAMP1,OK

Now we want to turn off the unit, send the following commands to the audio amplifier (NOTE: is the 0x0D HEX value for Carriage Return):

  • Send: NEAMP1,POWER=OFF
    • Response: NEAMP1,OK

Application drawing 312-0001, 312-0002 and 312-0003

Bellow application for all models of our amplifier.

Neets 312-0002 - Application drawing 312-0001, 312-0002 and 312-0003 - 1

flowchart 
graph TD
    A["SCREEN MODE"] --> B["RS-232 PORT 1"]
    B --> C["SPEAKER CABLE"]
    C --> D["NEETS AUDIO AMPLIFIER P/N#: 312-0001"]
    D --> E["RS-232 PORT 2"]
    E --> F["NEETS CONTROL - EU, PROF P/N#: 307-0002"]
    F --> G["2 x I/O"]
    G --> H["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    H --> I["Screen Mode"]
    I --> J["RS-232"]

The Neets Control – EU, professional is controlling the audio amplifier on RS-232 port 2 on the control system, and is connected to RS-232-1 on the audio amplifier. Furthermore the Neets Control – EU, professional is controlling the screen thru I/O and the projector on RS-232 port 1.

Application drawing 312-0002 and 312-0003

Bellow application for the 2 biggest models of our amplifier.

Neets 312-0002 - Application drawing 312-0002 and 312-0003 - 1

flowchart 
graph TD
    A["SCREEN MODE"] --> B["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    B --> C["RS-232 PORT 1"]
    C --> D["NEETS AUDIO AMPLIFIER P/N#: 312-0002"]
    D --> E["NEETS CONTROL - FOXTROT P/N#: 310-0001"]
    E --> F["2 x I/O"]
    F --> G["Speaker Cable"]
    G --> H["RS-232 PORT 1"]
    H --> I["NEETS AUDIO AMPLIFIER"]
    I --> J["NEETS CONTROL - FOXTROT P/N#: 310-0001"]
    J --> K["2 x I/O"]
    K --> L["NEETS AUDIO AMPLIFIER"]
    L --> M["RS-232 PORT 1"]
    M --> N["NEETS CONTROL - FOXTROT P/N#: 310-0001"]

The Neets Control – FoXtrot is controlling the audio amplifier on the RS-232 port on the control system, and is connected to RS-232-1 on the audio amplifier. The projector is connected to the “loopthru port” on the amplifier (RS-232-2) and therefore the Neets Control – FoXtrot is also controlling the projector thru the audio amplifier. The two I/O on the Neets Control FoXtrot is controlling the screen up/down.

Application drawing 312-0003

Bellow application for the biggest model of our amplifier.

Neets 312-0002 - Application drawing 312-0003 - 1

flowchart 
graph TD
    A["SCREEN MODE"] --> B["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    B --> C["NEETS CONTROL - EU, PROF P/N#: 307-0002"]
    C --> D["NETWORK SWITCH"]
    D --> E["COMPUTER ON NETWORK CENTRAL CONTROL OR WEB PAGE OF AUDIO AMPLIFIER"]
    E --> F["RS-232 PORT 1, 2 or 3"]
    F --> G["SPEAKER CABLE"]
    G --> H["NEETS Audio AMPLIFIER P/N#: 312-0003"]
    H --> I["Computer on Network Central Control or Web Page of Audio Amplifier"]
    I --> J["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    J --> K["2 x I/O"]
    K --> L["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    L --> M["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    M --> N["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    N --> O["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    O --> P["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    P --> Q["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    Q --> R["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    R --> S["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    S --> T["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    T --> U["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    U --> V["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    V --> W["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    W --> X["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    X --> Y["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    Y --> Z["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    Z --> AA["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    AA --> AB["NEETS 2-RELAY W/PSU P/N#: 307-0007"]
    F --> AC["RS-232"]

The Neets Control – EU, professional is controlling the audio amplifier on the LAN port on the control system. The Audio amplifier is controlling the projector on RS-232-1 and the 4 – Relay box on RS-232-2 (screen up/down), so here we uses 2 of the 3 RS-232 ports on the Audio amplifier, and only the LAN connector on the Neets Control EU, professional

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Product information

Brand : Neets

Model : 312-0002

Category : Receiver