The CM 1243-5 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
• 3-pin plug-in terminal strip for connection of the 24 V DC external supply voltage

The CM 1243-5 is plugged into the left-hand system bus interface of the S7-1200. The power is supplied via a 3-pin terminal strip on top of the module. The rugged RS485 interface is located on the underside of the module, protected by the lower front flap.