FISCHER FT90 - Electrical Connections; Operation in Areas at Risk of Explosion

FISCHER Mess- und Regeltechnik GmbH Assembly | 3
BA_EN_FT90 17/108
3.4 Electrical connections
• By authorized and qualified specialized personnel only.
• When connecting the unit, the national and international electro-technical
regulations must be observed.
• Disconnect the system from the mains, before electrically connecting the
device.
• Install the consumer-adapted fuses.
• Do not connect the connector if strained.
3.4.1 Operation in areas at risk of explosion
WARNING
Do not connect the connector if strained
Sparks can be created, the plug is mounted under tension or replaced.
• If the device is operated in potentially explosive atmospheres, the electrical
data of the unit and the valid local regulations and guidelines for the installa-
tion and operation of electrical systems in potentially explosive atmospheres
must be observed (e.g. DIN EN 60079).
• If the device is used in a potentially explosive atmosphere, the personnel
must have received additional training/instruction and/or have obtained a
permit for working on explosion-proof devices in potentially explosive sys-
tems.
• A CE-conform mains adapter with a slow 200 mA fuse only may be used in
the power supply circuit.
NOTICE!The outer ground connection must always be connected to the
protective potential equalisation or a similar local potential equalisation.
The ground terminal is suitable for connecting fine-wire conductors up to 4 mm
2
or single-wire conductors up to 6 mm
2
.
The earthing connection serves to discharge static electricity.
Earth terminal
Warning
WARNING - DO NOT CONNECT OR DISCONNECT EQUIPMENT UNDER VOLTAGE
Fig.11: Earthing connection