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1797-OB4D Allen-Bradley
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The 1797-OB4D is an Allen-Bradley FLEX Ex 4-point non-isolated sourcing output module designed for hazardous locations. It connects to the FLEX Ex terminal base (e.g. 1797-TB3) and provides discrete sourcing outputs from a common 24 V DC supply. Within a control system it delivers status feedback and fault diagnostics for field devices. It is typically used in industrial installations requiring intrinsically safe outputs in Zone 1/Division 1 applications, such as in chemical, oil & gas, or process control environments. Part number 1797-OB4D.
Best Suited For
- Zone 1 / Class I Division 1 hazardous-location discrete outputs
- FLEX Ex I/O systems requiring intrinsically safe sourcing outputs
- Applications needing per-channel fault/status indication
- Integration into FLEX Ex assemblies with 1797-TB3/TB3S terminal base
Technical Specifications
I/O & Electrical
Communication & Power
Physical & Environmental
Certifications
Intrinsic safety ratings: Ex ib[ia] IIC T4, suitable for Class I Zone 1 / Division 1 hazardous locations; entity parameters: 27.4 V, 110 mA, Ca/Ia for Group IIC: 30 nF / 2 mH; UL standards UL 913, UL 1203, UL 2279.