Siemens EF 847 Series Manual de servicio descargar pdf (Pagina 28)

Connection

5.3 Equipotential bonding

SIMATIC IPC847C

28 Getting Started, 12/2010, A5E02669190-02

Connecting to the redundant power supply

Steps for connecting the device to mains (redundant power supply)

1 Connect the two connectors for cooling

devices ①

2 Switch both On/Off switches on or off

simultaneously. The LED at the power

supply ③ lights up green.

Note:

If only one control supply module is switched

on or connected, or a module is defective, a

warning signal is emitted. You cancel the

warning signal by pressing button

④.

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5.3 Equipotential bonding

A low-impedance ground connection improves the discharge of interference generated by

external power cables, signal cables or cables for I/O modules to ground.

Equipotential bonding terminal

The equipotential bonding terminal ① on the device

(large surface, large-area contact) must be

connected with the central grounding busbar of the

cabinet or plant in which the PC is to be installed.

The minimum conductor cross-section may not be

less than 5 mm

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Siemens EF 847 Series Manual de servicio Pagina 28