KROHNE BM 102 EN - Manual (Page 16)

16 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 00ATEX1101 X 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 or 0.31” … 0.39”, IP 65 or NEMA4
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.