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Signal Connections Chapter 3
SC-2043-SG User Manual 3-8 © National Instruments Corporation
Full-Bridge Connection
In this configuration all four elements of the bridge are external to the SC-2043-SG. Four lead
wires connect the full-bridge to screw terminals +EXn, -EXn, CHn+, and CHn-. The pair of
wires connected to +EXn and -EXn provides excitation voltage to the bridge, and the other pair
connected to CHn+ and CHn- senses the output voltage of the bridge. Figure 3-1 shows this
configuration, along with the appropriate half-bridge jumper placement.
Half-Bridge
Completion
Jumper
Half-Bridge
Completion
Reference
x10
+EX
n
+EX
FB
HB
CH
n
+
CH
n
-
-EX
n
Full Bridge
Figure 3-1. Full-Bridge Connection to the SC-2043-SG
Half-Bridge Connection
In this configuration only two strain gauges are used. Bridge completion is provided by a half-
bridge completion reference internal to the SC-2043-SG. Three lead wires connect the half-
bridge to screw terminals +EXn, -EXn, and CHn+. The pair of wires connected to +EXn and
-EXn provides excitation voltage to the half-bridge, and the other wire connected to CHn+ senses
the output voltage of the half-bridge with respect to the internal half-bridge completion reference.
Figure 3-2 shows this configuration, along with the appropriate half-bridge jumper placement.
Half-Bridge
Completion
Jumper
Half-Bridge
Completion
Reference
x10
+EX
n
+EX
FB
HB
CH
n
+
CH
n
-
-EX
n
Half Bridge
Figure 3-2. Half-Bridge Connection to the SC-2043-SG