CLICK Analog PLC, 8 KB user memory, real time clock/calendar, battery backup, RS-232 (RJ12) port with programming and monitoring protocol(s) at up to 115.2k baud, RS-232 (RJ12) port with Modbus RTU Master/Slave and ASCII In/out protocol(s) at up to 115.2k baud, RS-485 (3-wire terminal block) port with Modbus RTU Master/Slave and ASCII In/out protocol(s) at up to 115.2k baud, Discrete I/O: 4-point input, 24 VDC, sinking/sourcing, 4-point output, 24 VDC, sourcing, Analog I/O: 2-channel input, input current signal range(s) of 4 - 20 mA, input voltage signal range(s) of 0 - 5 VDC, 2-channel output, output current signal range(s) of 4 - 20 mA, output voltage signal range(s) of 0 - 5 VDC, external 24 VDC required. Removable terminal block included. Requires CLICK programming software v1.12 or later and CLICK CPU firmware v1.10 or later.