3 utility connections group, 1 10/100 ethernet | m&c 100 port, rj-45 (standard), 2 remote control connector, db-9m – Comtech EF Data CDM-570A User Manual
Page 73: 3 alarms (form-c traffic alarms) connector, db-15m
CDM-570A/570AL Satellite Modem with Optional Packet Processor
MN-CDM570A
Rear Panel Connectors and Pinouts
Revision 2
3–11
3.2.3 Utility Connections Group
3.2.3.1 10/100 Ethernet | M&C 100 Port, RJ-45 (Standard)
This 8-pin RJ-45 modular port is present on the base modem assembly. Use a
CAT5 cable to connect this port to an Ethernet hub, router, switch, PC, etc. for
M&C purposes and to update the base modem firmware.
for the typical port pinouts.
3.2.3.2 Remote Control Connector, DB-9M
Use this 9-pin type ‘D’ male (DB-9M) connector to connect the modem to an M&C
computer, or terminal device. This interface is user-selectable for either EIA-232 or
EIA-485.
Table 3-5. Remote Control Connector Pin Assignments
Pin # Description
Direction
1 Ground
---
6
EIA-485 Receive Data B**
In
2 EIA-232 Transmit Data
Out
7
EIA-485 Receive Data A**
In
3 EIA-232 Receive Data
In
8
EIA-485 Transmit Data B
Out
4 Reserved - do not connect to this pin
---
9
EIA-485 Transmit Data A
Out
5 Ground
---
**Use for EIA-485 2-Wire operation
3.2.3.3 Alarms (Form-C Traffic Alarms) Connector, DB-15M
Use this 15-pin type 'D' male (DB-15M) connector to provide user access to
the Form-C relay contacts that indicate the unit alarms/fault status. These
contacts typically connect to the external fault monitoring system often
found in satellite earth stations.
This connector also provides:
•
The receive ‘I’ and ‘Q’ demodulator samples. Connecting these signals to an oscilloscope in
X,Y mode will provide the receive signal constellation diagram, which is a useful diagnostic
aid.