Introduction; Safety Information - Siemens SITRANS SL Operating Instructions Manual

Explosion protection
5.2 FM
5.2 FM
5.2.1

Introduction

The basic principles of explosion protection are the same all over the world. However,
technologies have developed in North America in the field of explosion protection for electric
equipment and installations which are considerably different from those of the IEC
(International Electrotechnical Commission). The differences from IEC technologies are
among others the classification of hazardous locations, the construction of devices and the
installation of electric systems.
The FM certificate is a system certificate and is only valid if SITRANS SL is installed
according to the instructions given in the certificate.
5.2.2

Safety information

Electric safety
The SITRANS SL FM version is delivered with an approval for use in hazardous
environments in which explosive gases are in use.
Open cable inlet or incorrect cable gland
Danger of explosion
Close the cable inlets for the electric connections. Only use cable glands or plugs which are
approved for the type of protection "Flameproof enclosure Ex d".
When using a conduit system, you must provide an ignition lock-out at a maximum distance
of 46 cm (18") from the device inlet. Screw in the conduit with at least four turns of the
thread.
Observe the specifications and laws with regard to the installation location of the device.
Fix the safety mechanism for the lid.
78
WARNING
WARNING
WARNING
Operating Instructions, 12/2010, A5E01132948-04
SITRANS SL