The SRI8000-8A0B coupler is a field-type IO-Link master module with the Modbus-TCP\S7-TCP bus protocols and 8 IO-Link interfaces, with 8 channels of Class A/Class B configurable; maximum 16 DI channels, PNP type, and maximum 16 DO channels, NPN/PNP configurable (DI, DO, and IO-Link protocols cannot be multiplexed on the same interface), 24 VDC power supply, auto-negotiation mechanism, auto-crossover function, and metal housing.