SIMATIC S7-1200, DCM 1271 data decoupling module for AS-i Master CM 1243-2 IN: DC 24 V / 30 V OUT: 1x AS-Interface, 4 A integrated overload protection integrated ground fault detection signaling contact SIMATIC S7-1200 Basic Controller - flexible thanks to a wide range of communication options. In order to ensure data transmission to a wide variety of systems, a range of communication modules is offered for the SIMATIC S7-1200, from the RS232 interface via AS-i to the PROFIBUS connection in master or slave mode. This ensures a wide range of possible applications for the SIMATIC S7-1200.