Electrical Wiring For The 8045 Flow Transmitter; Vdc Without Relay - 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 8045 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 the
tightness of the transmitter. Unscrew the cable gland nut, insert the
obstructor and screw the nut back on the cable gland.
Switch 1
Switch 2
ENTER
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
1
+
Lock
Fuse
300 mA
+
Power
-
supply
18-36 VDC
(*)
2 4
3 6
5
P-
-
P+
Fig. 3.3 Sourcing configuration - Position A
12
Coax connections
8045