Siemens SIMATIC S7-1200 Instrukcja obsługi - Strona 19

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Siemens SIMATIC S7-1200 Instrukcja obsługi

Mounting

4.1

Installation

Type of mounting

The CSM 1277 compact switch module is intended for mounting on a 35 mm DIN rail. Wall

mounting is possible (see S7-1200 System Manual).

Note

When installing and operating the device, keep to the installation instructions and safety-

related notices as described here and in the manual SIMATIC NET Industrial Ethernet

Twisted Pair and Fiber Optic Networks /1/.

Note

Provide suitable shade to protect the device against direct sunlight. This avoids unwanted

warming of the device and prevents premature aging of the device and cabling.

If temperatures in excess of 70 °C occur on the cable or at the cable feed-in point, or the

temperature at the branching point of the cables exceeds 80 °C, special measures need to

be taken. If the equipment is operated at an ambient temperature of 50°C - 60°C, use

cables with a permitted ambient temperature of at least 80°C.

Protective measures must be taken to avoid the rated voltage of the equipment being

exceeded by more than 40% by transient overvoltages. This is the case if the equipment is

supplied exclusively by SELV circuits.

If the CSM 1277 is operated in an ambient temperature of more than 55 °C, the

temperature of the device housing may be higher than 70 °C.

The subject unit must be located in a Restricted Access Location where access can only be

gained by SERVICE PERSONNEL or by USERS who have been instructed about the

reasons for the restrictions applied to the location and about any precautions that shall be

taken when operated in an air ambient in excess of 55 °C.

Compact Switch Module CSM 1277

Operating Instructions, V. 1.20, A2B00079397B

WARNING