Product specifications

CRS-300 1:10 Redundancy Switch Revision 16
Connector Pinouts MN/CRS300.IOM
6–2
6.1.2 485 Pass-Through – DB-9F Connector
Table 6-1 ind
icates the pinout for the DB-9F 485 Pass-Through connector,
used only with the CDM-Qx/QxL modems.
Table 6-1. 485 Pass-Through User Data Connector
Pin Description Direction
1 Ground
2 EIA-232 Transmit Data Out
3 EIA-232 Receive Data In
4 Reserved - do not connect to this pin
5 Ground
6
EIA-485 Receive Data B (see note)
In
7
EIA-485 Receive Data A (see note)
In
8 EIA-485 Transmit Data B Out
9 EIA-485 Transmit Data A Out
Note: Use for 2-wire EIA-485 operation.
6.1.3 Remote Control Connector – DB-9M Connector
The DB-9M Remote Control connector provides access to the remote
control ports of the Switch, both EIA-232 and EIA-485. Table 6-2
provides the pinout
information.
Table 6-2. Remote Control Connector
Pin Description Direction
1 Ground
2 EIA-232 Transmit Data Out
3 EIA-232 Receive Data In
4 Reserved - do not connect to this pin
5 Ground
6
EIA-485 Receive Data B (see note)
In
7
EIA-485 Receive Data A (see note)
In
8 EIA-485 Transmit Data B Out
9 EIA-485 Transmit Data A Out
Note: Use for 2-wire EIA-485 operation.