National Instruments 321906B-01 Figure 1-4. Front Connector Pinout Assignments to Create a 6 x 4 Matrix

Chapter 1 Routing Signals with Your NI2501/2503
NI 2501/2503 User Manual 1-8
© National Instruments Corporation
Figure 1-4. Front Connector Pinout Assignments to Create a 6 x 4 Matrix
For matrix mode, connect all pins with the same name together external to
the switch card. The National Instruments TB-2606 terminal block
connects the necessary pins to create the 6 x 4 matrix.
COL5–
COL4–
COL3–
COL2–
COL1–
COL0–
GND
+5 V
ROW3–
ROW2–
COL5–
COL4–
COL3–
COL2–
COL1–
COL0–
AB1– (ROW2–)
AB0– (ROW0–)
COL5–
COL4–
COL3–
COL2–
COL1–
COL0–
ROW1–
ROW0–
COL5–
COL4–
COL3–
COL2–
COL1–
COL0–
CJS–1
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
COL5+
COL4+
COL3+
COL2+
COL1+
COL0+
EXT_TRIG_IN
SCAN_ADV
ROW3+
ROW2+
COL5+
COL4+
COL3+
COL2+
COL1+
COL0+
AB1+ (ROW2+)
AB0+ (ROW0+)
COL5+
COL4+
COL3+
GND
COL2+
COL1+
COL0+
ROW1+
ROW0+
COL5+
COL4+
COL3+
COL2+
COL1+
COL0+
CJS+1
1_WIRE_LO_REF1
1not used in matrix mode