Digital Input Channels 4 Input Type Sink or Source Off Voltage Level +1V max. On Voltage Level +4V to +30V Input Impedance 3KOhm , 0.5W Counters channels : 4 Max. Counters : 16-bit (65535)  Max. Input Frequency : 100Hz Min. Pulse Width : 5ms Optical Isolation 3750Vrms Relay Output Channels 4 Relay Type Form A x2, Form C x2 Contact rating AC: 125V @0.6A; 250V @0.3A DC: 30V @2A; 110V @0.6A Operating Time(typical) 3ms Release Time(typical) 2ms Total Switching Time 10ms Surge Strength 500VAC(50/60Hz) Insulation resistance 1000MW min. at 500Vdc Interface Interface RS-485 Format N, 8, 1 Baud Rate 1200 ~ 115200bps LED Display 1 LED as Power/ Communication indicator 4 LEDs as Digital Input indicators and 4LEDs as Relay Output indicators (for M-7060D) Power Input Voltage Range 10~30VDC Power Consumption 1.3 W (max.)(M-7060) / 1.9 W (max.)(M-7060D) Protocol Support Modbus and DCON Protocol Yes Environment Operating Temperature -25 to 75°C Storage Temperature -40 to 85°C Humidity 5 to 95%, non-condensing