Chapter 1 Routing Signals with Your NI2501/2503
©
National Instruments Corporation 1-5 NI 2501/2503 User Manual
Figure 1-1. Front Connector Pinout Assignments for Two-Wire ModeCH23–
CH22–
CH21–
CH20–
CH19–
CH18–
GND
+5 V
COM3–
COM2–
CH17–
CH16–
CH15–
CH14–
CH13–
CH12–
AB1–
AB0–
CH11–
CH10–
CH9–
1_WIRE_LO_REF1
CH8–
CH7–
CH6–
COM1–
COM0–
CH5–
CH4–
CH3–
CH2–
CH1–
CH0–
CJS0–
135
236
337
438
539
640
741
842
943
10 44
11 45
12 46
13 47
14 48
15 49
16 50
17 51
18 52
19 53
20 54
21 55
22 56
23 57
24 58
25 59
26 60
27 61
28 62
29 63
30 64
31 65
32 66
33 67
34 68
CH23+
CH22+
CH21+
CH20+
CH19+
CH18+
EXT_TRIG_IN
SCAN_ADV
COM3+
COM2+
CH17+
CH16+
CH15+
CH14+
CH13+
CH12+
AB1+
AB0+
CH11+
CH10+
CH9+
GND
CH8+
CH7+
CH6+
COM1+
COM0+
CH5+
CH4+
CH3+
CH2+
CH1+
CH0+
CJS0+
1not used in two-wire mode