Simatic S7-1200, the signal plate -battery module bb 1297, for back-up of real-time clock for CPU S7-12xx (firmware 3.or newer ); battery type cr1025, note: module doesn't include battery...
Simatic NET, module of compact switch CSM 1277 within construction Simatic S7-1200, PROFINET/ETHERNET, 4 x RJ45, speed 10/100 mbits/s, unmanaged, power supply 24V DC, diagnostic LED, the technical documentation ...