System components: Digital input module SFC411

The module senses the DC input voltage and converts it into a True (ON) or False (OFF) logic signal. It has 2 optically isolated groups. The green LED lights when the external power is connected, the yellow LEDs indicate the state "TRUE" at a particular input point. In order to feed conventional analog, discrete and pulse signals into the control system and to provide facilities for controlling valves, starters, pumps, switches etc., a number of local I/O modules can be added to the Field Controller rack assembly. The modules are addressed by means of a channel number in a special Field Controller hardware transducer block and, depending upon type and function, connected to the fielbus system by means of multiple or standard input and output blocks. Depending upon I/O type, an Analog or Discrete Multiple function block provides a connection for up to 16 input or output signals.

For more information on System components: Digital input module SFC411 talk to Endress+Hauser Ltd