Comtech EF Data SMS-301 User Manual
Page 32

Installation
SMS-301 Redundancy Switch
2–10
Rev. 3
2.3.2.5
Data I/O Connector (J1, J2, J3) 37-Pin (PL/6201-2)
Note: For EIA-422 Serial Interface applications.
The 37–pin D subminiature connector has the pin assignments shown in Table 2-8.
Table 2-8. Connector Assignments, 37-Pin
Pin #
Signal Function/Name
Comment
1
Signal GND
Mod/Demod
2
Send Timing (ST-B)
Modulator
3
Modulator Fault (MF)
Modulator
4
NC
NC
5
NC
NC
6
NC
NC
7
NC
NC
8
NC
NC
9
Clear To Send (CS-A)
Modulator
10
NC
NC
11
NC
NC
12
NC
NC
13
Send Data (SD-B)
Modulator
14
Request To Send (RS-B)
Modulator
15
NC
NC
16
NC
NC
17
NC
NC
18
NC
NC
19
Terminal Timing (TTA)
Modulator
20
NC
NC
21
Send Timing (TT-A)
Modulator
22
NC
NC
23
NC
NC
24
NC
NC
25
NC
NC
26
NC
NC
27
Clear To Send (CS-B)
Modulator
28
NC
NC
29
NC
NC
30
NC
NC
31
NC
NC
32
Send Data (SD-A)
Modulator
33
Request To Send (RS-A)
Modulator
34
NC
NC
35
NC
NC
36
NC
NC
37
Terminal Timing (TT-B)
Modulator