Siemens 6ES7278-4BD32-0XB0 is the SM1278 IO-Link Master module for the SIMATIC S7-1200 family, delivering four IO-Link master channels to connect up to four IO-Link devices to a single PLC slot. It operates on 24 V DC and communicates with IO-Link devices in accordance with IO-Link Specification V1.1, enabling straightforward sensor and actuator integration within a SIMATIC system. The part number 6ES7278-4BD32-0XB0 is listed in Siemens catalogs as SM1278, four-channel IO-Link Master for SIMATIC S7-1200, with Industry Mall listings confirming this configuration.
