Product Description
🔹 General Information
|
Manufacturer |
Allen-Bradley |
|---|---|
|
Model/Part Number |
1746-NO8I |
|
Description |
Analog Output Module |
🔹 Technical Specifications
Power & Electrical Characteristics
|
Attribute |
Specification |
|---|---|
|
I/O Chassis Location |
Any 1746 chassis slot except slot 0 |
|
Backplane Current Consumption (Max) |
120 mA @ 5V DC 250 mA @ 24V DC (J4 jumper set to RACK) 0 mA @ 24V DC (J4 jumper set to EXT) |
|
Backplane Power Consumption (Typical) |
5.6W |
|
Optional External 24V DC Power Supply |
+24V DC ±10% (N.E.C. Class 2 required) |
|
Thermal Dissipation |
6.6W |
|
Field Wiring to Backplane Isolation |
500V DC |
Outputs & Signal Characteristics
|
Attribute |
1746-NO8I (Current Output) |
1746-NO8V (Voltage Output) |
|---|---|---|
|
Number of Outputs |
8 |
8 |
|
Output Type |
Current |
Voltage |
|
Output Range |
0 to 21.5 mA |
±10.25V DC |
|
Output Coding (Proportional Scaling) |
0 to 32,767 |
-32,768 to +32,767 |
|
D/A Converter Resolution |
16-bit (366 nA/count) |
16-bit (320 µV/count) |
|
Non-Linearity |
0.06% of full scale |
0.06% of full scale |
|
DAC Conversion Method |
R-2R Ladder Network |
R-2R Ladder Network |
|
Output Step Response Time |
1 ms (0 to 95% of full scale) |
1 ms (0 to 95% of full scale) |
|
Channel Update Time (Typical) |
Class 1: 5 ms to update all 8 channels Class 3: 10 ms to update all 8 channels |
Class 1: 5 ms to update all 8 channels Class 3: 10 ms to update all 8 channels |
|
Load Range |
0 to 500 ohm |
1K ohm and greater |
|
Load Current |
N/A |
10 mA (max) |
|
Load Reactance |
1 µH (max) |
1 µF (max) |
|
Output Impedance |
Greater than 1M ohm |
Less than 1.0 ohm |
|
Over-Range Capability |
7.5% (21.5 mA) |
2.5% (±10.25V) |
Accuracy & Error Characteristics
|
Attribute |
1746-NO8I (Current Output) |
1746-NO8V (Voltage Output) |
|---|---|---|
|
Overall Accuracy |
0.1% of full scale @ 25°C 0.2% of full scale @ 60°C |
0.1% of full scale @ 25°C 0.2% of full scale @ 60°C |
|
Overall Accuracy Drift |
±33 ppm/°C of full scale (max) |
±33 ppm/°C of full scale (max) |
|
Gain Error |
0.08% of full scale @ 25°C 0.15% of full scale @ 60°C |
0.08% of full scale @ 25°C 0.15% of full scale @ 60°C |
|
Gain Error Drift |
±25 ppm/°C of full scale (max) |
±25 ppm/°C of full scale (max) |
|
Offset Error |
±12 LSB @ 25°C (typ) ±29 LSB @ 60°C (typ) |
±13 LSB @ 25°C (typ) ±32 LSB @ 60°C (typ) |
|
Offset Error Drift |
±0.48 LSB/°C (max) |
±0.53 LSB/°C (max) |
Physical & Installation
|
Attribute |
Specification |
|---|---|
|
LED Indicators |
- 8 Green channel status indicators (one per channel) - 1 Green module status indicator |
|
Calibration |
Factory calibrated |
|
Recommended Cable |
Belden 8761 (shielded, twisted-pair) or equivalent |
|
Wire Size (Max) |
Two 14 to 24 AWG wires per terminal |
|
Grounding Wire (Optional) |
¼ inch wide (minimum) braid |
|
Terminal Block |
Removable (supplied) |
|
Replacement Terminal Block Catalog Number |
1746-RT25G |