SIPLUS HCS4200 RACK4200 For holding up to 12 power output modules (POM) POM4220. The POMs are contacted via direct connectors on a bus PCB which of the rear of the rack connected. Communication to the higher- level controller takes place via the central interface module (CIM), which is attached on the left side of the rack SIPLUS HCS4200 - the especially space-saving, cost-optimized heating solution. with different output modules, I/O modules and racks