KROHNE BM 700 EN - Manual (Page 7)

BM 700 Installation and Operating Instructions Page 7
3 Electrical connection
To open the terminal compartment of the signal converter, first open the safety lock
with an Allen key (size: 4 mm) and then use the enclosed special wrench to turn the
cover anticlockwise.
Supply power
Variant Voltage range Recommended fuse protection
24 V DCAC 19.2 - 28.8 V DC or
20.4 - 26.4 V AC min. T 0.5 A
Terminal assignment
Supply power:
Terminal compartment BM 700: External power supply "FEAS, type PSLC242":
Power supply galvanically insulated according to VDE 0551
Dimensions (W×H×D): 55Ч75Ч110 mm, usable for rail
mounting
Class of protection
The BM 700 level gauge is designed for safety class 1 in conformity with VDE 0106
Part 1.
24 V DCAC supply
When connected to a “functional extra-low voltage with safety separation“ power
source (SELV or PELV) in accordance with VDE 0100, Part 410 or equivalent
(inter)national regulations, connection of a safety conductor (PE) is not required.
Equipotential bonding
When used in hazardous areas, the BM 700 Ex must be incorporated in the PA
equipotential bonding system , irrespective of the type of power supply! If the PA is
connected via a separate conductor, this must be connected to the separate U-clamp
terminal at the “neck“ of the BM 700 Ex. Cancellation of equipotential bonding is only
permitted when the BM 700 is disconnected from supply.
Rated temperature of connecting cables: see Section 6.
+ + - -
L1L1 N N 3 4
230 V AC
BM 700 (max. 5 instruments)
+ + - -
L1L1 N N 3 4
115 V AC
BM 700 (max. 5 instruments)
32 31
-
+
Current
output
1 2
- +
4-20mA
max.350
Ω
Power supply
24 V DC (+/-20%)
24 V AC (+10/-15%)
or
< 300 mA