Chapter 4
Connecting and Using Accessories and Transducers
©
National Instruments Corporation
4-27
Figure 4-14. The second approach is to use the four-wire scan mode and
connect them as shown in Figure 4-15.
Figure 4-14.
Series Connection with Current Excitation
Figure 4-15.
Four-Wire Scan Connection with Multiplexed Current Excitation
CH+0
CH–0
CH+1
CH–1
CH+2
CH–2
CH+15
CH–15
IEX+
IEX–
R
1
R
2
R
3
R
16
R
T
= R
1
+...+ R
16
″
5 k
CH+8
CH+0
CH–0
CH–8
CH+9
CH+1
CH–1
CH+15
CH+7
CH–7
CH–15
CH–9
R
1
R
2
R
8
Any R
5 k
