AB 1797-OB4D

The Allen‑Bradley 1797‑OB4D is a 4-channel, non-isolated sourcing digital output module from the FLEX Ex I/O family, specifically engineered for hazardous area applications requiring intrinsic safety . This module eliminates the need for expensive explosion-proof enclosures or external safety barriers by integrating intrinsic safety circuitry directly into the I/O hardware, significantly reducing cabinet space and installation costs . As part of the FLEX Ex system, the 1797‑OB4D is rated for installation in Class I, Zones 0, 1, & 2 and Class I, II, III, Division 1 & 2 hazardous locations . It provides reliable output control for field devices such as solenoids, actuators, and indicator lights in the most demanding industrial environments.