KROHNE BM 102 Handbook - Manual (Page 18)

18 BM 102
2 Electrical connections
2.1 Electrical installation instructions
2.1.1 Wiring general notes
Connection to power is effected at the plug connector in the signal converter. Two wiring
compartments are available: DIN connector or M16 terminal box. Observe applicable rules and
regulations for cable connection: VDE 165 or equivalent national regulations.
Always disconnect from power supply before opening wiring compartment. This is not mandatory for
Exi applications.
Hazardous-duty systems
Only certified intrinsically safe equipment may be connected to
the BM 102 in hazardous areas. Please refer to the BM 102
MICROFLEX KEMA 00 ATEX 1101X Supplementary Installation
and Operating Instructions for further information. This document
is available from your local KROHNE Sales office or on the
“Download Centre” on KROHNE’s website http://
www.krohne.com/.
2.1.2 Wiring
connections: DIN connector
Terminals:
3 poles and 1 x ground. Wire cross-section: max. 1.5 mm²
(AWG 16)
Cable entry: 1 x PG11, cable diameter: 8 … 10 mm (0.31 … 0.39”), IP 65
Shielding: do not connect to the DIN connector.
Signal cable: no shielding required
1 Detach screw P and remove plug from signal
converter.
2 Separate part N from part R by inserting the flat
tip of a screwdriver into gap F.
3 Connect current loop to terminals 1 and 2 (any
polarity). Use ferrules to protect cable ends.
Terminals 3 and E are not connected.
4 Fit parts N and R together again.
5 Fit gasket, re-insert connector plug R on the
signal converter, and replace screw P.
Caution
Grounding terminal E is not connected to
the housing of the signal converter or to
the device flange. To avoid ground current
loops, the cable shielding may not be
connected at both ends.
Hazardous-duty systems
When used in hazardous areas, only one
intrinsically safe power supply may be
connected to terminals 1 and 2. Ground
terminal E and terminal 3 are not
connected.