Electrical Wiring For The Flow Transmitter; Vdc Without Relays - bürkert 8045 Bedienungsanleitung

Do not open and wire the transmitter with the power supply connected
It is advisable to put security devices on:
Power supply: Fuse (300 mA) and an interrupter
Relay: 3A max. fuse and circuit breaker (depending on application).
Do not apply both a dangerous voltage and a very low safety voltage to
the relays.

3.4 ELECTRICAL WIRING FOR THE FLOW TRANSMITTER

3.4.1 18-36 VDC without relays

Lift the transparent lid after having unfastened the screw. Remove the cover via the screws
on the front display and pull the cable through the cable glands and wire according to one
of the pin assignment diagrams below.
The electronics within the 8045 allows a PLC with a sourcing or sinking 4-20 mA entry to
be connected.
Position A (Fig 3.3) provides a sourcing configuration and Position B (Fig 3.4) a sinking
configuration.
Seal the unused cable gland using the supplied obstructor to ensure
thetightness of the transmitter. Unscrew the cable gland nut, insert the
obstructor and screw the nut back on the cable gland.
Unlock
Flat cable
connection
(*) If direct earthing is impossible, connect a
100 nF / 50 V-condensator between the negative
terminal and the earth.
INSTALLATION
4-20 mA
+
PLC
/Valve
-
I
POS A
Switch 1
Switch 2
ENTER
Lock
Fig. 3.3 Sourcing configuration - Position A
12
Fuse
300 mA
18-36 VDC
+
Power
-
supply
(*)
1 2 4
3 6
5
P-
+
-
P+
Coax connections
8045