Meriam M2110F SMART FLOW GAUGE User Manual
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14.2 CURRENT LOOP MODEL WIRING
14.2.1 Current Loop Model Interface Connections
The Current Loop Model connections are made through the supplied interface cable. The cable is connected to an
eight (8) pin circular receptacle on the back of the unit. These connections will be defined by wire color coding of
the cable.
Pin #
Wire
Color
Description
Function
Notes
1
BLACK
0 VDC IN
Gauge Power Supply Common
0 VDC Input
2
WHITE
-LOOP
4-20 mA Analog Return
(+) mA output to receiver
3
RED
+LOOP
4-20 mA Loop Power Input
4
GREEN
+24VDC IN
Gauge Power Supply Input
+ 24 VDC Input Nominal
5
NOT USED
6
BROWN
RS232 Common
RS232 interface common connection
0 VDC
7
BLUE
RS232 Rx
RS232 receive input connection
For Serial Menu
8
ORANGE
RS232 Tx
RS232 transmit output connection
For Serial Menu
Note: See Appendix for wiring specifics.
Note: R = Receiving Device
24 VDC/ 50 mA
Power Supply
+
-
Gauge & Loop Power
R
2110F
4
3
2
1
3 WIRE SINKING
24 VDC/ 50 mA
Power Supply
+
-
Gauge & Loop Power
R
2110F
4
3
2
1
4 WIRE SOURCING
LOOP
+ Power Supply
24 VDC
20mA
-
R
4
3
2
2110F
FLOW
GAUGE
1
+
GAUGE
Power Supply
24 VDC/ 30 mA
-
4 WIRE FLOATING