Inputs Digital Inputs All Rievtech PLCs accept a some number of digital inputs. Digital Digital Input Sensors inputs sense binary status, such as on/off, switch open/closed, etc. The AC versions of the Micro PLC are suitable for operation with rated voltages between 110 V AC and 240 V AC. The DC versions Push buttons can be operated with a 12 - 24 V DC power supply. Limit switches Any connection to AC voltage more than 79 V AC is sensed as Proximity sensors a ‘1’ (for AC versions) or DC voltage more than 10 V DC (for DC Photo-electric sensors versions). Voltage below 40V AC (or 5V DC for DC versions) or an Level switches open connection is sensed as ‘0’.
Pressure switches Auxiliary contacts of a contactors Relay/contactor contacts The minimum time for a change in state of a digital input, is 50ms for the change to be detected (except high speed inputs which can operate up to 60 kHz). Digital inputs include push-buttons, limit switches, relay contacts, proximity switches, photo sensors (On/Off), pressure switches and more. Digital input devices are available in both DC as well as AC and some are voltage independent such as a switch contact. AC Input Sinking DC Input MIRCO PLC AC Version MIRCO PLC DC Version Common - DC 12-24V Input Sensing + Input 5 Common AC 110-240V Input Input Sensing