Installation and commissioning
2.6 Installation on a standard DIN rail
CP 243-1
50 Operating Instructions, 03/2012, C79000-G8976-C244-02
2.6 Installation on a standard DIN rail
Installation on a standard DIN rail
1. Open the catch and hang the CP 243-1 on the DIN rail to the right of or above the CPU.
2. Close the catch to secure the CP 243-1 to the rail. Make sure that the catch snaps in
correctly and that the device is firmly secured to the rail.
Note
In environments in which strong vibration occurs or when the devices are installed
vertically, it may be necessary to use standard DIN rail stoppers to keep the devices from
slipping down the DIN rail.
3. Insert the ribbon cable of the CP 243-1 in the connector under the front cover of the
adjacent module or the S7-200 CPU. The shape of the plug prevents it from being
incorrectly inserted.
4. Connect the grounding terminal:
5. Connect the grounding terminal of the CP 243-1 with the nearest available ground to
obtain the highest possible interference immunity. We recommend that you connect all
grounding terminals individually. Use wires with a cross section of 1.5 mm
2
.
6. Connect the power supply.
7. Connect the Ethernet cable.
The transmission medium is a 2 x 2-wire, twisted pair, shielded cable with a characteristic
impedance of 100 ohms. The transmission properties of this cable must meet category 5
requirements (Cat5 cable). The maximum length of the connection between an end
device and network component (link segment) is limited to 100 m with the components
defined in IEEE802.3.
The RJ-45 plug on the CP 243-1 is shielded so that, in combination with a shielded
Ethernet cable, a continuous cable shield is created that ensures interference-free
Ethernet transmission. The shield of the RJ-45 plug is connected via the grounding
terminal of the CP 243-1.
We recommend that you shield and ground the Ethernet connection as described in the
document "SIMATIC NET Twisted Pair and Fiber-Optic Networks".
Installation is now complete.
Note
Keep the front cover of the CP 243-1 closed during operation.
During installation, make sure that the upper and lower ventilation slits of the module are not
obstructed and good ventilation is possible.
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