National Instruments MCA-7724 Figure 6 showsthe pin assignments for connector B.

©NationalInstruments Corporation 7 MCA-7724Motion Axis Router
Figure 6 showsthe pin assignments for connector B.
Figure6. 68-Pin Connector B Pin Assignments
AnalogReference (Output)
NC
AnalogInput 3
AnalogOutput Ground
NC
AnalogOutput 3
DigitalGround
NC
Breakpoint3
DigitalGround
NC
NC
NC
DigitalGround
DigitalGround
NC
NC
NC
NC
DigitalGround
DigitalGround
NC
Axis4 Inhibit
Trigger4
Axis4 Home Switch
DigitalGround
DigitalGround
Axis4 Dir (CCW)
Axis3 Inhibit
Trigger3
Axis3 Home Switch
DigitalGround
DigitalGround
Axis3 Dir (CCW)
AnalogInput Ground
AnalogInput 4
Reserved
AnalogOutput 4
Shutdown
NC
Breakpoint4
NC
NC
Host+5 V
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Axis4 Reverse Limit Switch
Axis4 Forward Limit Switch
Axis4 Encoder Index
Axis4 Encoder Phase B
Axis4 Encoder Phase A
Axis4 Step (CW)
Axis3 Reverse Limit Switch
Axis3 Forward Limit Switch
Axis3 Encoder Index
Axis3 Encoder Phase B
Axis3 Encoder Phase A
Axis3 Step (CW)
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