Comtech EF Data DMD2401/DMD2401L - Manual (Page 166)

DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem Electrical Interfaces
TM065 - Rev. 3.3 5-27
5.8.6 ALARM (J6)
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 shown in Table 5-3:
The pin definitions for J6 are shown in Table 5-4. Note that the NC and NO (Normally Closed and
Normally Open nomenclature applies to non-energized relays.
5.8.7 REMOTE (J7)
The Remote Port (J7) is the RS-485 connection for remote monitor and control of the modem. It
is a 9-Pin Female “D” Connector. Refer to Table 5-5 for the connector pinouts.
5.8.8 SWITCH INTERFACE (J8)
The Switch Connector Port (J8) is the redundancy switch connector. It is a 68-Pin High-Density
Female Connector. Refer to Table 5-8 for connector pinouts.
This connector may be used for multiple interface types by installing either the SCSI to RS-422 or
SCSI to V.35 Cable Assembly (refer to Table 5-24).
Table 5-24.
Interface
Types
Cable
Assembly
Number
Reference
Table for
Cable
Pinouts
RS-422 CA/4826 Table 5-25
V.35 CA/4841 Table 5-26