The CM 1242-5 offers all the benefits of the S7-1200 design.

• Rugged, compact plastic enclosure
• Easily accessible connection and diagnostics elements, protected by front flaps
• Removable connecting terminals
• Simple mounting on the mounting rail of the S7-1200
• 9-pin sub-D socket for the bus interface to PROFIBUS

The CM 1242-5 is plugged into the left-hand system bus interface of the S7-1200. Power is supplied via the system bus of the S7-1200 so that no extra cabling is required. The rugged RS485 interface is located on the underside of the module, protected by the lower front flap.