Product Overview

The Allen-Bradley 1746-NIO4V functions as a versatile analog combination module for the SLC 500 platform, providing both input and output capabilities in a single chassis slot. It features two differential inputs capable of handling both voltage and current signals, alongside two dedicated non-isolated voltage outputs. This "combination" architecture proves ideal for PID loop control where a single slot must manage both the sensor feedback and the command signal to an actuator. We supply this module as 100% Brand New and Factory Sealed, ensuring peak performance for your legacy or existing SLC systems.

Technical Specifications

Engineering Advantages

• Slot-Saving Efficiency: By integrating two inputs and two outputs into a single 1746 module, the 1746-NIO4V frees up critical chassis space. This allows you to add complex analog control to compact SLC 5/03 or 5/04 systems without upgrading to a larger rack.

• High-Precision Signal Processing: The module utilizes 16-bit input resolution to detect minute fluctuations in process variables. This level of sensitivity ensures that your SLC processor receives accurate data for critical pressure, temperature, or flow applications.

• Rapid Loop Response: With a dedicated update time of 512 microseconds and a fast 2.5 ms output step response, this module handles dynamic control tasks with ease. It minimizes the lag between signal acquisition and actuator command, a necessity for stable high-speed closed-loop control.

• Differential Input Protection: The differential input design rejects common-mode noise and ground loops often found in industrial environments. This hardware-level filtering ensures signal integrity even when field sensors share long cable runs with noisy motor leads.

FAQs

What is the difference between the 1746-NIO4V and the 1746-NIO4I?

The 1746-NIO4V provides Voltage Outputs (-10V to +10V), whereas the 1746-NIO4I provides Current Outputs (0 to 20 mA). Both modules offer the same input capabilities, but you must choose the model that matches your actuator's required signal type.

Does the 1746-NIO4V require an external power supply?

The module draws its operating power directly from the SLC 500 backplane (55 mA at 5V and 115 mA at 24V). However, you must ensure your chassis power supply (e.g., 1746-P1 or P2) has sufficient remaining capacity on the 24V rail, as analog modules are significantly more power-intensive than standard digital modules.

How do I switch between voltage and current on the input channels?

You configure the input type via DIP switches located on the module’s circuit board and further define the range within the I/O configuration of your RSLogix 500 software. Ensure you set the physical switches before inserting the module into the chassis to prevent signal mismatch.

Is this a Series A or Series B module?

We currently offer this as New & Original Series A stock. While Series letters may vary based on the manufacturing date, all units remain fully backward compatible with SLC 500 systems and function identically within your PLC program logic.