Vertex Standard 7122B, 7133B 2 - 3, Table 2-1 shows the connections between the ACU and the OU.

INSTALLATION
2 - 3
Table 2-1 shows the connections between the ACU and the OU.
TABLE 2-1. 7122B/7133B ACU CONNECTIONS TO 7122B/7133B OU
ACU, J8 PIN NO. FUNCTION OU TERMINAL STRIP
1 AZ CW COMMAND 1
2 AZ COMMON 2
3 AZ CCW COMMAND 3
4 EL UP COMMAND 4
5 EL COMMON 5
6 EL DOWN COMMAND 6
7 POL CW COMMAND 7
8 POL COMMON 8
9 POL CCW COMMAND 9
10 AZ CW LIMIT 10
11 AZ CCW LIMIT 11
12 EL UP LIMIT 12
13 EL DOWN LIMIT 13
14 POL CW LIMIT 14
15 POL CCW LIMIT 15
16 EMERGENCY STOP 16
17 GROUND 17
18 GROUND 18
19 +24V 19
20 +24V 20