Connecting Sensor Inputs; Meter-Powered Bridge Input; Externally-Powered Bridge Input - Omega DP25B-S User Manual

3.4 CONNECTING SENSOR INPUTS

Figures 3-6 shows excitation supplied from the meter's internal supply
(50 mA maximum) Select 5, 10, or 12 volt excitation at DIP switch.
Figures 3-7 shows the connections required for an externally-powered bridge input: the
external supply is brought to the meter's buffer circuits to permit ratiometric readings.
Set S1 DIP switch for external excitation for Figure 3-7 and 3-8.
+
EX
-
EX
Figure 3-7. Externally-powered Bridge Input
- + + +
E E 20mA R
1 2 3 4
TB2
+ + - -
24 S S R
5 6 7 8
+
-
Figure 3-6. Meter-powered Bridge Input
- + + +
E E 20mA R
1 2 3 4
TB2
+ + - -
24 S S R
5 6 7 8
+
-
Getting Started
Connections with "typical wire colors"
+E = Positive Excitation (red)
-E = Negative Excitation (black)
+S = Positive Signal Input (green)
-S = Negative Signal Input (white)
Connections with "typical wire colors"
+E = Positive Excitation (red)
-E = Negative Excitation (black)
+S = Positive Signal Input (green)
-S = Negative Signal Input (white)
3
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