CLICK Standard PLC, 8 KB user memory, real time clock/calendar, retentive memory, 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, 8-point input, 24 VDC, sinking/sourcing, 6-point output, Form A (SPST) relay(s), 6 - 240 VAC / 6 - 27 VDC. Removable terminal block included. Requires CLICK programming software v1.20 or later and CLICK CPU firmware v1.20 or later.