Product Overview
The Allen-Bradley 1746-OB32E is a SLC 500 Digital DC Output Module engineered for demanding industrial control environments. This module provides thirty-two (32) 24VDC output channels with integral electronic protection, making it a robust choice for high-current switching applications.
Designed for both fixed and modular SLC 500 chassis, the 1746-OB32E delivers dependable performance while safeguarding your system against overload and short-circuit conditions.
Technical Specifications
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number / Catalog No. |
1746-OB32 |
| Series |
SLC 500 |
| Module Type |
Digital DC Output Module |
| Number of Outputs |
Thirty-Two (32) |
| Voltage Range |
10-30 Volts DC |
| Nominal Output Voltage |
24VDC |
| Current per Output |
0.5 or 0.25 amps |
| Current per Module |
8 amps |
| Points per Common |
Sixteen (16) |
| Backplane Current (5 Volts) |
190 milliamps |
| Step Response |
60 ms in, 2.5 ms out |
| Signal Delay, ON |
0.1 ms |
| Signal Delay, OFF |
1.0 ms |
| Electronic Protection |
Yes |
Key Features & Benefits
-
Integral Electronic Protection: Each output channel includes thermal cut-out protection that limits current within milliseconds during overload or short-circuit conditions, preventing damage to the module and connected equipment.
-
High-Density Output: With 32 outputs in a single module, the 1746-OB32E maximizes I/O capacity while minimizing panel space.
-
Fast Response: Step response of 60 ms in and 2.5 ms out, with signal delays of just 0.1 ms (ON) and 1.0 ms (OFF), ensures precise control in time-critical applications.
-
Removable Terminal Blocks: Color-coded, removable terminal blocks simplify wiring and maintenance.
-
LED Status Indicators: Front-panel LEDs provide immediate visual confirmation of output status, aiding in troubleshooting and commissioning.
Applications
The Allen-Bradley 1746-OB32E is ideally suited for applications requiring reliable, high-current DC switching. Typical uses include:
- Material handling systems
- Packaging machinery
- Automotive assembly lines
- Process control panels
Installation & Setup
Install the 1746-OB32E into any SLC 500 chassis. Ensure the backplane connector is properly seated and the module is secured with the mounting screws. Wire the output devices to the removable terminal blocks, observing correct polarity. Route input power separately from I/O signal cables to minimize electrical noise. The module supports two 14 AWG (2 mm²) wires per terminal.
Maintenance & Reliability
Regularly inspect the module for dust accumulation and ensure adequate airflow around the chassis. Verify that all terminal screws remain tight. The built-in electronic protection reduces the risk of damage from overcurrent events, extending the module's service life and reducing downtime.
Compatibility & Integration
The 1746-OB32E is part of the Allen-Bradley SLC 500 family and integrates seamlessly with SLC 500 processors and other 1746-series I/O modules. It is compatible with both fixed and modular SLC 500 hardware configurations.
Buying Guide
When ordering the Allen-Bradley 1746-OB32E, verify the part number and confirm compatibility with your existing SLC 500 system. PLC Source PRO offers genuine, tested modules with fast shipping. Ensure your order includes the correct module type and quantity for your application.