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1791-N4C2 Allen-Bradley
Original price
$311.31
-
Original price
$1,059.19
Original price
$311.31
$311.31
-
$1,059.19
Current price
$311.31
Trusted By
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The 1791-N4C2 is an analog Block I/O module within Allen-Bradley's 1791 series. It provides four selectable analog inputs and two current outputs. In a control system, it interfaces directly with field-level analog sensors and actuators, performing signal acquisition and output generation via a DH-485 link. It is commonly used in PLC-2, PLC-3, PLC-5, and SLC-500 systems for applications such as analog monitoring, setpoint control, and feedback loops. Typical industrial uses include process control loops, analog condition monitoring, and remote I/O expansion. 1791-N4C2.
Best Suited For
- Analog signal acquisition and conditioning
- Integration with SLC-500 or PLC-5 controllers
- Remote analog I/O expansion via DH-485 network
- Closed-loop control and setpoint output generation
Analog inputs
4 selectable channels
Analog outputs
2 current outputs (0-20 mA)
Input resolution
14 bit
Output resolution
13 bit
Input update rate
108 ms per channel
Technical Specifications
I/O & Electrical
Type of input
±10 V, ±5 V, 0-10 V, 0-5 V, 0-20 mA, ±20 mA (14 bit)
Inputs per block
4 selectable
Input impedance
Voltage: 10 MΩ; Current: 249 Ω
Absolute accuracy (input)
0.1 % @ 25 °C FSR
Linearity (input)
0.05 % @ 25 °C FSR
Common-mode rejection
-75 dB
Normal-mode rejection
-18 dB @ 50 Hz; -20 dB @ 60 Hz
Outputs per block
2 current outputs
Output current range
0-20 mA (13 bit)
Output impedance
> 1 MΩ
Output update rate
10 ms per channel
Drive capability
20 mA into ≤ 1 kΩ load
Short-circuit protection
Indefinite
Absolute accuracy (output)
0.1 % @ 25 °C FSR
Linearity (output)
0.05 % @ 25 °C (over 4-20 mA)
Overall accuracy drift
75 ppm/°C
+24 V loop power voltage
20-28 V DC unregulated
+24 V loop power current
100 mA
Communication & Power
Power supply (loop)
20-28 V DC unregulated, 100 mA
