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Installation and commissioning

2.5 Installation in a panel

CP 243-1

Operating Instructions, 03/2012, C79000-G8976-C244-02

2.5 Installation in a panel

What to do / steps

1. Bore holes for DIN M4 screws on the panel. Follow the instructions in section Dimensions

for installation in a switching panel (Page 48).

2. Screw the CP

243-1 to the panel to the right of the CPU for horizontal installation and

above the CPU for vertical installation. Use DIN M4 screws.

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:

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

5. Connect the power supply.

6. 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 connector 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 connector 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.

Siemens CP 243-1 User Manual

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