KROHNE BM 70A EEx EN User Manual
Page 25
25
07/2010 - 4000662402 MA BM70x-Ex-AD-R02-en
5.3. Electrical Connection BM 702-Ex / BM 702 A-Ex
5.3.1.
General Information
5.3.1.1.
Terminal Compartment
The electrical connection is made in the terminal compartment of the converter.
The cable clamping range of the delivered cable entrances enfolds 9 - 16 mm.
There have to be used cables with appropriate bores or cable entrances with adapted clamping range.
5.3.1.2.
Connecting Cables
The connecting cable for intrinsically safe electric circuits, is to choose appropriate to the valid
installation standard.
By increased product temperatures (also see Section 3.3.2 and 3.3.3 "temperature class")
heat resistant cables with a permanent use temperature of 80°C have to be used according the type
test certificate.
5.3.1.3.
Connection power supply and I/O Function
The connections are carefully to insulate from all not used conductors, as well as from the
screening of the connecting cable, against each other and towards earth. (Test voltage 500 V
eff for conductors of the intrinsically safe cable).
Only certified intrinsically safe equipment is allowed to be affiliated to the connecting clamps. At
this the permitted maximum values (see section 3.1.4 and type test certificate annex A.1) have
to be taken into account. This demand applies even, if the device is not operating in hazardous
locations!
Connection assignment
Terminal Compartment BM 702-Ex / BM 702 A-Ex:
The polarity of the 4-20 mA
Connection is arbitrary
FE
1
2
4-20mA
current
loop
cable gland
Attention!
It is not allowed to use the 10-pin service connector X6 in hazardous locations.