Connector Pinouts
CDM-500 Closed Network Satellite Modem
5–2
Rev.
1.3
•
DO NOT connect signals to pins which are not shown - these pins are reserved for
use by the redundancy system
•
‘B’ signal lines are not used for RS232 applications
•
For X.21 operation, use the RS422 pins, but ignore Receive Clock if the Modem is
DTE, and ignore Transmit clocks if the Modem is DCE
5.2
Alarms Connector - 15 Pin ‘D’ Type Male
Table 5-2 Alarms Connector
Pin
Description
1 Ground
5
Unit Fault Relay - Normally Open
12
Unit Fault Relay - Normally Closed
4
Unit Fault Relay - Common
8
Receive Traffic Relay - Normally Open
15
Receive Traffic Relay - Normally Closed
7
Receive Traffic Relay - Common
14
Transmit Traffic Relay - Normally Open
6
Transmit Traffic Relay - Normally Closed
13
Transmit Traffic Relay - Common
11
Receive I sample (for constellation display)
3
Receive Q sample (for constellation display)
2
Receive AGC voltage
9
External Carrier Off input
10
---- No Connection ----
Note:
‘Normally Open’ refers to the NON-FAIL state
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