The Allen-Bradley 1746-OB32 is a high-density digital output module designed for the SLC 500 programmable logic controller system. This module provides thirty-two (32) sourcing transistor outputs, allowing for efficient control of DC-powered field devices. It is engineered for industrial environments where space-saving and high-channel-count I/O are required for complex automation tasks.
Sixteen (16) points per common group, providing flexible wiring configurations.
Efficient backplane power consumption of 190 mA at 5V.
Compact open-style chassis design for standard SLC 500 rack mounting.
Technical Specifications
Model Number
1746-OB32
Number of Outputs
32
Output Type
Transistor Source
Voltage Range
5-50 VDC
Current per Point
0.25 A to 0.5 A
Current per Module
8 A
Points per Common
16
Backplane Current (5V)
190 mA
Installation Guidelines
Ensure the SLC 500 rack power is disconnected before installing or removing the module.
Slide the module into the designated chassis slot until the backplane connector is fully seated.
Secure the module using the top and bottom retaining screws to prevent vibration-induced disconnection.
Use appropriate shielded cabling for field wiring to minimize electromagnetic interference (EMI).
Maintain adequate clearance around the module to allow for proper heat dissipation and airflow.
Verify that the field power supply is within the specified 5-50 VDC range before energizing the outputs.
FAQ
What is the primary function of the 1746-OB32?
This module acts as a digital output interface for the SLC 500 system, converting controller logic into 32 individual DC sourcing signals to drive actuators, relays, or indicators.
How many points are grouped per common?
The 1746-OB32 features two groups of 16 points, each sharing a common connection.
Is this module compatible with all SLC 500 chassis?
Yes, the 1746-OB32 is designed for standard SLC 500 I/O chassis; however, always ensure your power supply capacity is sufficient to handle the total current load of all installed modules.
