Brodie BERT-E - DC Power Connection

DC Power Connection
Model BPD6830AB2B1 is provided with a terminal labeled P+ and is wired as shown in Figure 9.
BPD6830AB2B1 units may be connected to DC power and the battery will function as backup power
when DC is lost. The same power supply may be used to power other circuits including a PNP-type
sensor, however to maintain input isolation, a separate power supply must be used to power the isolated
4-20 mA transmitter as shown in Figure 10 and/or to power the Opto-Isolated Flowmeter as shown in
Figure 3.
Power
Supply
COM RST
P+
S+ S-
Figure 8. DC Power Connections
External Total Reset Connection
External total reset connections are made between RST and COM. Connect to a contact closure source
such as a relay or a pushbutton as shown in Figure 9. Avoid extended contact closure to preserve battery
life. The total is reset when he button is pressed. The meter will start to totalize immediately. Holding
down the button has no effect on the total.
COM RST+
S+
S-
+3.0
V
100 kOhm
Internal Pullup
Figure 9. Reset Connections
4-20 mA Transmitter Output Connections
Output connections are made to two terminals labeled LP+ and LP-. Connect to an input device such as a
remote display or chart recorder as shown in Figure 10.
LP- LP+
Power
Supply
4-20 mA Input
Device
Figure 10. 4-20 mA Output Connections
12