KROHNE BM 102 EN - Manual (Page 17)

BM 102 17
2.1.3 Wiring connections: M16 terminal box
Power terminals:
Wire cross-section: max. 1.5 mm² (AWG 16)
Cable entry: 1 x M16 x 1.5, cable diameter: 3.5 … 8 mm or 0.14” … 0.31”, IP65 or
NEMA4.
For USA: ½” NPT conduit connection
Shielding: Do not connect shielding to the terminal compartment.
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 is not to be connected.
Caution
Ground terminal, E, is not connected to the signal converter housing or to the device
flange. To avoid ground current loops, the cable shielding may not be connected at
both ends.
1
Detach the 4 screws, T, and remove cover from terminal
compartment.
2 Connect the cable ends, fitted with ferrules, to the power
terminal, U (not polarity sensitive).
3 Shut the terminal compartment.
2.2 Power Supply
2.2.1 Non-hazardous-duty
version
Power supply
Rated voltage:
24 V DC
Max. voltage
(U
input max
):
35 V DC
’Ex’ = 28 V DC
Min. voltage
(U
input min
):
dependent on
load impedance,
see graph below
A supply voltage above 35 V DC can cause irreparable damage to the signal
converter. Also, power supply voltages above the specified max. values and below
the specified min. values can lead to faulty measurements or to a device reset.