Digital I/O coupler

With the Zone 1 and Class I Div.2 digital I/O couplers, you can connect eight intrinsically safe contacts or proximity switches and four intrinsically safe solenoid valves or pilot lights to a FOUNDATION™ Fieldbus H1. Input frequencies of up to 20 kHz are supported.

The coupler is supplied externally with auxiliary power (four-conductor device) in order to minimize the load on the fieldbus and, if required, can be operated in an intrinsically safe (FISCO) or non-intrinsically safe (High Power Trunk) configuration.

FF function and transducer blocks for DI, DO, DO valve, MDI, MDO, AI (frequency), CI (counter) and LTB (logic functions) are integrated in the couplers, making a whole host of applications possible.