The B855–016 intrinsically safe (fully isolated) input module accepts 16 switch closures or low impedance discrete inputs less than 100 Ω and operates in any 800 series I/O slot.

The B855 module monitors hazardous area contact closures. The B855 can operate in either continuously or intermittently hazardous environments containing acetylene, hydrogen, ethylene or methane gases; metal, coal or grain dust, and fibers. The B855–016 module meets factory mutual standard FM 3610 for intrinsically safe connections to field side associated apparatus.

The B855–016 module has 16 discrete inputs. The inputs work in the range 11.4-12.6 Vdc, True Low.