Comtech EF Data DMD2401/DMD2401L - Manual (Page 156)

DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem Electrical Interfaces
TM065 - Rev. 3.3 5-17
5.6.6 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.
5.6.7 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.
5.6.8 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.
5.6.9 SD (J9)
The Send Data Port (J9) is the unbalanced Send Data BNC Connector.
5.6.10 DDO (J10)
The Data Drop Out Port (J10) is the unbalanced Data Drop Out BNC Connector.
5.6.11 IDI (J11)
The Insert Data In Port (J11) is the unbalanced Insert Data In BNC Connector.
5.6.12 RD (J12)
The Receive Data Port (J12) is the unbalanced Receive Data BNC connector.
5.6.13 ESC ALARMS (J14)
The ESC Alarm Interface Port (J14) is the ESC Alarm Connector. It is a 25-Pin Female “D”
Connector. Refer to Table 5-14 for connector pinouts.