1762-OW16 | Allen Bradley | Relay Output Module

The Allen Bradley 1762-OW16, also cataloged as the 1762-OW16 Relay Output Module, operates as a dedicated hardware component for the discrete switching of high-load AC and DC circuits within MicroLogix 1200 controller networks.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The 1762-OW16 module utilizes the MicroLogix backplane bus to interface with the host controller. The backplane bus communication velocity dictates the timing of relay state transitions, which exhibit a maximum signal delay of 10 ms for both on and off states under resistive loads. Firmware flash compatibility is handled through the primary controller logic, ensuring that output registers are mapped correctly to the 16 available channels. I/O density scaling is achieved by configuring the module within the controller's I/O table, provided the backplane current draw remains within the defined limits of the MicroLogix power supply base.

Frequently Asked Questions

Q: Can the 1762-OW16 handle inductive loads directly?

A: While the relay contacts are rated for AC/DC switching, inductive loads must be suppressed using external MOV, RC snubber, or flyback diode circuits. Failure to suppress inductive kickback will lead to premature contact welding and reduced mechanical life of the relay.

Q: Is this module capable of hot-swapping?

A: No. The 1762-OW16 does not support hot-swapping. Ensure all power sources connected to the relay output groups are de-energized before removing or installing the module to avoid electrical arcing or damage to the backplane connectors.

Field Installation Guidelines

1. Mounting: Secure the module on a 35 mm DIN rail or directly to an enclosure panel. Ensure the locking tab is fully engaged to maintain mechanical stability.
2. Wiring Standards: Use Category 2 wiring for all signal ports. Segregate high-voltage AC lines from low-voltage DC signals to minimize crosstalk.
3. Current Capacity: Do not exceed 2.5 Amps per individual point or 8 Amps per common. Ensure the total module current does not exceed 16 Amps at any given time.
4. Environment: Verify that the ambient temperature remains within the -20 to 65 deg C range and the installation location maintains an IP20 environment or better to prevent debris ingress.
5. Termination: Connect field wires securely to the terminal blocks. Verify all connections are tight to minimize contact resistance, which contributes to the 6.1 Watts of heat dissipation.