Description
| Parameter | Specification |
| Product Model | Allen-Bradley 1771-NIV |
| Module Type | Analog Input Module |
| Number of Inputs | 8 Floating Differential Inputs |
| Input Range | -10 to +10V DC, 0 to 10V DC, 1 to 5V DC |
| Resolution | 12-bit Binary |
| Backplane Current | 1.0A @ 5V DC |
| Isolation Voltage | 1500V AC (RMS) |
| Operating Temperature | 0 to 60°C (32 to 140°F) |
| I/O Chassis | 1771-A1B, -A2B, -A3B, -A4B |
The 1771-NIV is a versatile analog input module designed for the Allen-Bradley PLC-5 system, providing high-density interfacing for voltage-based sensors. It features eight differential inputs that are electrically isolated from the backplane to ensure signal integrity in electrically noisy industrial environments. The module converts analog signals into 12-bit digital values, allowing the processor to monitor precise variables such as pressure, temperature, or flow. Its robust design and compatibility with the standard 1771 I/O chassis make it a reliable choice for legacy system maintenance and specialized control applications requiring stable voltage monitoring.


ALLEN BRADLEY 1771-NIV

ALLEN BRADLEY 1771-NIV
Model Comparisons
The 1771-NIV is strictly a Voltage Input module, which distinguishes it from the 1771-NIC, which is designed specifically for Current Input (4-20mA). While both share the same 12-bit resolution and 8-channel density, the 1771-NIV lacks the internal shunt resistors found in the NIC model. Furthermore, it differs from the high-resolution 1771-IFE series, which offers software-configurable inputs (supporting both voltage and current) and higher bit-depth, whereas the NIV is a hardware-focused solution optimized for dedicated voltage ranges.
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