The CP 1243-8 IRC offers all the advantages of the S7-1200 design:

• Rugged, compact plastic enclosure
• Easily accessible connection and diagnostics elements, protected by front flaps
• Removable terminals
• Simple mounting on the mounting rail of the S7-1200
• 3-pin plug-in terminal strip for connection of the 24 V DC external supply voltage
• Permissible slots:
  + A single CP 1243-8 IRC can be plugged in to the left of the S7-1200-CPU
  + A single TS module can be plugged in to the left of the CP 1243-8 IRC

If a TS module is plugged in, the power is supplied via a 3-pin terminal strip on top of the module. Any required modems or routers are connected via the Ethernet interface on the underside of the module.