Allen-Bradley 1762-OB32T Solid State Output Module

Configured for high-density digital signal switching in MicroLogix control networks, the Allen-Bradley 1762-OB32T (1762-OB32T Source Output Module) provides direct physical/electrical execution. This hardware unit manages 32 solid-state source outputs organized into two groups, facilitating 24 VDC load control across industrial interface applications.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The 1762-OB32T module utilizes the MicroLogix expansion bus to receive state data from the host controller. The deterministic nature of the I/O bus requires that firmware flash compatibility be maintained between the expansion module and the base processor to ensure accurate command execution. I/O density scaling is managed by the module's 32-channel architecture, requiring that total current draw remains within the defined group and module ratings (2.0 A per group, 4.0 A per module) to prevent thermal overload of the switching circuitry.

Frequently Asked Questions

Q: Does this module support hot-swapping?

A: No. The 1762-OB32T is not designed for insertion or removal while the MicroLogix expansion bus is energized. Power must be removed from both the module and the base unit before installation or replacement.

Q: Can this module drive inductive loads directly?

A: Yes, but inductive loads must be suppressed using external flyback diodes or surge suppressors to prevent transient voltage spikes from damaging the solid-state switching transistors within the module.

Field Installation Guidelines

• Mounting: The module must be attached to the MicroLogix base unit or a preceding expansion module via the integrated ribbon cable connector. Ensure the locking tabs are fully engaged to maintain electrical continuity.
• Wiring Specifications: Use 22 to 26 AWG copper wire for all terminal connections. Ensure wires are stripped to the appropriate length to prevent exposed conductor shorts, and verify terminal screw torque complies with manufacturer specifications.
• Grounding: Ensure the common return path is connected to a stable 24 VDC ground reference. High-current output groups should have dedicated return paths to minimize voltage drops and cross-channel interference.
• Thermal Management: The module dissipates 3.4 W during operation. Ensure the surrounding enclosure provides adequate convection paths and maintain ambient temperatures below 60 deg C to ensure component longevity.