Product Introduction
The Allen-Bradley 1746-NIO4V is an analog combination I/O module from the SLC500 series, designed to deliver both input and output functionality in a single module. This integration reduces rack space and simplifies wiring, offering cost-effective control for industrial automation systems.
Technical Specifications Breakdown
| Parameter |
Value |
| No. of inputs |
Two (2) Differential Voltage / Current inputs |
| Current Input range |
-20 to 20 mA |
| Current input resolution |
1.22070 µA per LSB |
| Voltage Input range |
-10 to +10V dc - 1 LSB |
| Voltage input resolution |
305.176 µV per LSB |
| No. of Outputs |
Two (2) non-isolated voltage outputs |
| Output Voltage range |
-10 to +10 volts |
| Output voltage resolution |
1.22070 mV per LSB |
| Backplane Current at 5.1 Volts |
0.55 mA |
| Backplane Current at 24 Volts |
115 mA |
| Bandwidth |
10 Hertz |
| Update Time |
512 microseconds |
| Step Response |
60 milliseconds in, 2.5 milliseconds out |
The 16-bit input resolution and 14-bit output resolution ensure precise signal conversion, while the fast 512 µs update time supports real-time control loops.
Industry Applications
Common use cases for the Allen-Bradley 1746-NIO4V include monitoring process variables like pressure or flow with the voltage/current inputs and controlling actuators or indicators with the voltage outputs. For example, in a packaging line, it reads two sensor signals and sends control voltages to two positioners—all from one module, saving rack slots and wiring.
Compatibility & Integration
The 1746-NIO4V integrates with SLC500 systems and also works as a distributed I/O module for CompactLogix and ControlLogix Programmable Automation Controllers (PACs). This flexibility allows users to extend legacy I/O into modern control architectures without replacing the entire system.
Selection Guide & Purchasing Advice
When purchasing the 1746-NIO4V, verify compatibility with your chassis and backplane. The module requires 55 mA at 5.1 VDC and 115 mA at 24 VDC. For reliable signal wiring, use shielded cable like Belden #8761 with 14 AWG size. UBEST Automation (ubest101) offers genuine Allen-Bradley 1746-NIO4V modules with fast shipping and support.