Figure 3-4. MA-230 Module Adapter Top and Faceplate Views
Table 3-4. MA-230 In/Out and Contact Port Pin Assignments
Port
Connector
Type
Protocol
Comments
Signals
Pin Assignments
IN
6-pin phone
jack
RS-422
Balanced timing in
(1.544 or 2.048 MHz)
TIMING IN+
TIMING IN-
1
–
Timing in positive (+)
2
–
Timing in negative (-)
3
–
Unused
4
–
Signal ground
5 and 6
–
Unused
OUT
6-pin phone
jack
RS-422
Balanced timing in
(1.544 or 2.048 MHz)
TIMING OUT+
TIMING OUT-
1
–
Timing out positive (+)
2
–
Timing out negative (-)
3
–
Signal ground
4
–
Signal ground
5 and 6
–
Unused
Contacts
8-pin phone
jack
Outputs:
Open=high impedance
Closed=low impedance
1 and 2
–
Input 1
3 and 6
–
Output 2
4 and 5
–
Output 1
7 and 8
–
Input 2
