- CJ1 Special I/O Units, High Speed Counter Unit, Countable Channels 2, Encoder A and B inputs pulse input Z signal Open collector input Voltage 5 VDC 12 V or 24 V (5 V and 12 V are each for one axis line driver, Max counting rate 50 KHz 500 KHz, No of Numbers allocated, Current Consumption (A) 5 V 0.28 : CJ1W-CT021
