10A62-8C - Industrial electronic board Daytronic - Free user manual and instructions

Brand	Daytronic
Model	10A62-8C
Product Type	Signal Conditioner (Current Input)
Input Channels	8 independent current inputs
Input Current Range (Unipolar)	4 to 20 mA
Input Current Range (Bipolar)	4 to 12 to 20 mA (zero-center)
Amplifier Common-Mode Range	±20 V operating; ±50 V without damage
Common-Mode Rejection Ratio	DC: -100 dB; at 60Hz/1kHz/3kHz: -150 dB
Input Impedance (Differential)	100 Ω
Input Impedance (Common-Mode)	500 kΩ
Burden Voltage	2 V-DC at full scale
Initial Offset	±0.02% of full scale
Offset vs. Temperature	±20 ppm/°C
Offset vs. Time	±20 ppm/month
Gain Accuracy	±0.02% of full scale
Gain Stability vs. Temperature	±50 ppm/°C
Gain Stability vs. Time	±20 ppm/month
Filter Type	3-pole modified Butterworth, 3 dB down at 5 Hz, 60 dB down at 100 Hz
Settling Time (to 0.02%)	270 msec
Excitation	Not provided; current source must supply own power
I/O Connector	Mate with Daytronic CONDITIONER CONNECTOR No. 60322
Calibration Methods	Absolute and two-point (deadweight)
Power Supply	From mainframe (System 10) - not specified
Documentation	User manual (PDF, 4 pages)

Frequently Asked Questions - 10A62-8C Daytronic

What type of input signals can the 10A62-8C accept?

The 10A62-8C accepts 4-20 mA unipolar or 4-12-20 mA bipolar (zero-center) current signals on each of its 8 channels.

How many channels does the 10A62-8C have?

It has 8 independent current input channels.

What is the common-mode voltage range of the amplifier?

The common-mode range is ±20 V operating, and up to ±50 V without instrument damage.

What type codes are used for channel configuration?

For unipolar (4-20 mA) use type code 6C; for bipolar (4-12-20 mA) use type code 6D.

How do I calibrate a 4-20 mA channel absolutely?

Apply EMM x = 312.50 and BEE x = -25.00 (for 0-100% display). General formula: EMM x = 3.125 * F, BEE x = -0.25 * F, where F is the desired full-scale reading.

How do I calibrate a 4-12-20 mA channel absolutely?

Apply EMM x = 625.0 and BEE x = -150.0 (for ±100% display). General formula: EMM x = 6.25 * F, BEE x = -1.5 * F, where F is the desired full-scale reading.

What is the settling time of the 10A62-8C?

Settling time to 0.02% of final value is 270 msec; to 0.1% is 240 msec; to 1% is 170 msec.

Does the 10A62-8C provide excitation for the current loop?

No, the 10A62-8C does not provide excitation. The current source must supply its own power if required.

What is the filter characteristic of each channel?

Each channel has a 3-pole modified Butterworth filter with 3 dB down at 5 Hz and 60 dB down at 100 Hz.

What connector does the 10A62-8C use?

It mates with Daytronic CONDITIONER CONNECTOR No. 60322 for I/O connections.

USER MANUAL 10A62-8C Daytronic

This high-accuracy conditioner accepts up to eight independent current signals within the ISA standard range of 4-20 mA. Both unipolar and bipolar (“zero-center”) inputs are allowed. Since the 10A62-8C does not provide excitation, the current source must supply its own power supply, if required.

Chopper-stabilized amplification with active low-pass filtering yields excellent voltage compliance and make the 10A62-8C suitable for virtually any standard Process Industry current input.

ADDITIONAL 10A62-8C SPECIFICATIONS

Input Current: 4 to 20 mA (unipolar) or 4 to 12 to 20 mA (bipolar or “zero-center”); automatically selected—on an individual channel basis—when the channel is configured; for the System 10 channel “type” codes assigned to 10A62-8C data channels, see Table 1, below

Amplifier (per channel):

Common-Mode Range: ±20 V operating; ±50 V without instrument damage

Common-Mode Rejection Ratio: DC: -100 dB; at 60 Hz, 1 kHz, and 3 kHz: -150 dB

Input Impedance: Differential: 100 Ω; Common-Mode: 500 kΩ

Burden: 2 V-DC at full scale

Offset: Initial: ±0.02% of full scale; vs. Temperature: ±20 ppm/°C; vs. Time: ±20 ppm/month

Gain Accuracy: ±0.02% of full scale

Gain Stability: vs. Temperature: ±50 ppm/°C; vs. Time: ±20 ppm/month

Filter (per channel): 3-pole modified Butterworth; 3 dB down at 5 Hz; 60 dB down at 100 Hz

Step-Response Settling Time (Full-Scale Output):

To 1% of final value: 170 msec

To 0.1% of final value: 240 msec

To 0.02% of final value: 270 msec

Auxiliary Outputs to Mainframe Wire-Wrap Pins: None

Table 1 10A62-8C "Type" Codes
Full-Scale Channel Range Type Code

4-20 mA 6C

4-12-20 mA 6D

2 TRANSDUCER CONNECTIONS

The Model 10A62-8C's I/O CONNECTOR mates with Daytronic CONDITIONER CONNECTOR No. 60322, shown in Fig. 1.5 (in Manual Section 1.E.1). Standard cabling is shown in Fig. 1. Table 2 gives standard pin assignments for the I/O Connector.

Table 2 Model 10A62-8C Pin Assignments

I/O Connector Conditioner Conditioner Pin Channel Line Number Number Function
1	1	+SIGNAL
A	1	-SIGNAL
2	2	+SIGNAL
B	2	-SIGNAL
3	3	+SIGNAL
C	3	-SIGNAL
4	4	+SIGNAL
D	4	-SIGNAL
5	5	+SIGNAL
E	5	-SIGNAL
6	6	+SIGNAL
F	6	-SIGNAL
7	7	+SIGNAL
H	7	-SIGNAL
8	8	+SIGNAL
J	8	-SIGNAL
9,K,10,L Not Committed

Fig. 1 Model 10A62-8C Transducer Cabling

graph TD
    A["Reg. Power Supply (if required)"] --> B["4 - 20 mA Source"]
    B --> C["+ SIGNAL"]
    B --> D["- SIGNAL"]
    C --> E["CONDITIONER CONNECTOR (No. 60322)"]
    D --> E
    E --> F["SHIELD"]
    F --> G["Ground Lug"]
    style A fill:#f9f,stroke:#333
    style E fill:#ccf,stroke:#333
    style G fill:#cfc,stroke:#333

SETUP AND/OR OPERATING CONSIDERATIONS

3.a CONFIGURATION AND CALIBRATION

For initial configuration of ANALOG INPUT CHANNELS dedicated to a specific Model 10A62-8C card when used in System 10, see the general remarks on System 10 "real-channel" configuration in Manual Section 1.G.1 and elsewhere in the System 10 Guidebook. For 10A62-8C channel "type" codes, see Table 1, above.

In System 10, you can use two calibration methods with the Model 10A62-8C: "absolute" and "two-point (deadweight)." The procedure used for absolute calibration will depend on the selected "polarity" of the channel being calibrated. For a general discussion of absolute calibration, see Manual Section 1.G.3.b. Absolute calibration of a 10A68-2C-based channel yields an accuracy of ± 0.02% of full scale.

ABSOLUTE CALIBRATION FOR A 4-20 MA CHANNEL

After you have set a 10A62-8C-based input Channel No. "x" for UNIPOLAR (4 to 20 mA) MEASUREMENT by giving it a "type" code of "6C" (see Table 1), you can calibrate it "absolutely" for readout in percentage of transducer full-scale range to a precision of 0.01% , as follows:

1. Turn ON the system EEPROM SWITCH.
2. Apply a SCALING FACTOR (EMM) command of

$$ \text { EMM } x = 3 1 2. 5 0 [ \mathrm{CR} ] $$

1. Apply a ZERO OFFSET (BEE) command of

$$ \text { BEE } x = - 2 5. 0 0 [ \mathrm{CR} ] $$

In general, if “F” is the desired engineering-units reading corresponding to a unipolar input of 20 mA, and if the reading corresponding to a unipolar input of 0 mA is “0,” then the required EMM and BEE settings* for the channel are

$$ \mathbf {E M M} \mathbf {x} = (3. 1 2 5) \mathbf {F} \text { and } \quad \mathbf {B E E} \mathbf {x} = (- 0. 2 5) \mathbf {F} $$

ABSOLUTE CALIBRATION FOR A 4-12-20 MA CHANNEL

After you have set a 10A62-8C-based input Channel No. "x" for BIPOLAR ("zero-center" 4 to 12 to 20 mA) MEASUREMENT by giving it a "type" code of "6D" (see Table 1), you can calibrate it "absolutely" for readout in percentage of transducer full-scale range to a precision of 0.1%, as follows:

1. Turn ON the system EEPROM SWITCH.
2. Apply a SCALING FACTOR (EMM) command of

$$ \mathbf {E M M} \mathbf {x} = 6 2 5. 0 [ \mathrm{CR} ] $$

1. Apply a ZERO OFFSET (BEE) command of

$$ \text { BEE } x = - 1 5 0. 0 [ \mathrm{CR} ] $$

In general, if “F” is the desired engineering-units reading corresponding to a bipolar input of 20 mA, and if the reading corresponding to a bipolar input of 12 mA is “0,” then the required EMM and BEE settings* for the channel are

$$ \mathbf {E M M} \mathbf {x} = (6. 2 5) \mathbf {F} \text { and } \quad \mathbf {B E E} \mathbf {x} = (- 1. 5) \mathbf {F} $$

Two-Point (Deadweight) Calibration

Using the standard ZERO (ZRO) and FORCE (FRC) commands, this conventional "zero and span" method can be applied to a 10A62-8C channel if the received 4-20 mA input is an analog of another parameter which has one or more independently and accurately known calibration values. The mainframe's EEPROM Write Protect Switch must be ON for the ZRO and FRC commands to be effective. See Manual Section 1.G.5 for a general discussion of this calibration technique.