The CP 1243-1 offers all the advantages of the S7-1200 design:

• Rugged, compact plastic enclosure
• Easily accessible connection and diagnostics elements, protected by front flaps
• Simple mounting on the mounting rail of the S7-1200

The CP 1243-1 is plugged into the left-hand system bus interface of the S7-1200. Power is supplied directly via the S7-1200. No additional wiring is necessary. Any required modems or routers are connected via the Ethernet interface on the underside of the module.