Mocomtech CRS-300 2 485 Pass-Through DB-9F Connector, Remote Control Connector DB-9M Connector

CRS-300 1:10 Redundancy Switch	Revision 16
Connector Pinouts	MN/CRS300.IOM

6.1.2485 Pass-Through – DB-9F Connector

Table 6-1indicates 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

4Reserved - do not connect to this pin

5Ground

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.

6.1.3Remote 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 6-2provides 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

4Reserved - do not connect to this pin

5Ground

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.

6–2