Comtech EF Data RCF6001 User Manual
Page 17
RCF6001 Satellite Terminal
Installation
TM082 - Rev. 1.0
Page 2-5
J3 – RS232 Terminal Port
Table 2-2.
J3 - RS232 Terminal Port - 9-Pin Female ‘D’
Pin No.
Signal
Description
Direction
3
TxD
Transmit Data
Output
2
RxD
Receive Data
Input
5
Gnd
Ground
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J5 – Alarm Connection
The modem has two form-C dry contact alarm relays onboard and an alarm connector located on the
rear panel, the 9-pin male “D” sub connector J6.
The two relays are designated Modulator Alarm and Demodulator Alarm. Non-Alarm is defined as the
powered state of the relay. Thus, if there is a Modulator Alarm and/or Demodulator Alarm, the pins will
be connected as follows:
Alarm
No Alarm
Modulator
Pins 2 and 3 Shorted
Pins 1 and 2 Shorted
Demodulator
Pins 8 and 9 Shorted
Pin 7 and 8 Shorted
The pin definitions for J5 are shown in Table 2-3 below. Note that the NC and NO (Normally Closed
and Normally Open) nomenclature applies to non-energized relays.
Table 2–3.
J5 - Alarm Connector – 9-Pin Male ‘D’ Sub Connector
J6 Pin Number
Connection
1
Mod Alarm Relay A NO on Alarm
2
Mod Alarm Relay A Common
3
Mod Alarm Relay A NC on Alarm
4
-----
5
AGC Voltage Output
6
Gnd
7
Demod Alarm Relay B NO on Alarm
8
Demod Alarm Relay B Common
9
Demod Alarm Relay B NC on Alarm