OVERVIEW

Official designation: Allen-Bradley 1753-OB16 (GuardPLC Series, Digital Output Module)

Role/Application: A safety digital output module featuring 16 non-isolated 24V DC outputs for distributed control in industrial safety systems, utilizing integrated Ethernet switch capability.

KEY SPECS SUMMARY

Power: 24V DC nominal, -15 to 20 percent range

Interfaces / Ports: Two RJ-45 Ethernet ports with switch

Indicators: Status, diagnostic, and 16 I/O LEDs

Operating Temp: Refer to the latest manufacturer manual.

Platform / Compatibility: GuardPLC 1753 system, DIN rail mountable

Limit: 16 Outputs, 2 Amps maximum per channel

Lifecycle: Current Product (varies by model/revision)

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum surge current rating per channel for the digital outputs on this module?

A: The output channels are rated for a surge current of 4 Amps for 10 milliseconds at 1 Hertz.

Wiring & Installation:

Q: What is the recommended minimum fuse rating for external short-circuit protection of the 24V DC supply?

A: The module must be protected with an external 10 Amps slow-blow fuse on the input power line.

Troubleshooting & Compatibility:

Q: What are the key environmental installation restrictions, specifically regarding cooling and mounting?

A: The module must be mounted horizontally with a minimum 100 millimeters (3.94 inches) clearance above and below for cooling.

Replacement & Upgrades:

Q: What is the total current limit for each of the two output groups (Group 1 and Group 2) within the module?

A: The total current consumption for each output group must not exceed 8 Amps maximum.