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Open equipment
The devices are "open equipment" acc. to the standard IEC 61010-2-201 or UL 61010-2-201
/ CSA C22.2 No. 61010-2-201. To fulfill requirements for safe operation with regard to
mechanical stability, flame retardation, stability, and protection against contact, the
following alternative types of installation are specified:
• Installation in a suitable cabinet.
• Installation in a suitable enclosure.
• Installation in a suitably equipped, enclosed control room.
Power supply
The device is designed for operation with a directly connectable safety extra low voltage
(SELV) from a limited power source (LPS).
The power supply therefore needs to meet at least one of the following conditions:
• Only safety extra low voltage (SELV) with limited power source (LPS) complying with IEC
• The power supply unit for the device must meet NEC Class 2 according to the National
If the equipment is connected to a redundant power supply (two separate power supplies),
both must meet these requirements.
What to do / steps
1. Install the CP on the S7 standard rail.
Slots 4 to 11 are permitted for the CP in racks 0 to 3 (connected by IM 360/361).
2. Establish the connection via the enclosed bus connector to the backplane bus.
Proceed as described in the sections dealing with installation and wiring, explained in
detail in /2/ (Page 54).
Note
No operation in the expansion rack with connection via an IM 365
The CP cannot be used in an expansion rack that is connected via the IM 365! Reason: The
required communication bus is not connected to the extension rack via the IM 365.
CP 342-5
Equipment Manual, 01/2023, C79000-G8976-C146-11
WARNING
WARNING
60950-1 / EN 60950-1 / VDE 0805-1 or IEC 62368-1 / EN 62368-1 / VDE 62368-1 may be
connected to the power supply terminals.
Electrical Code (r) (ANSI / NFPA 70).
Installation, wiring, commissioning, removal
3.3 Installing, connecting and commissioning
37
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