3 remote control connector, db-9m – Comtech EF Data CRS-300 User Manual
Page 59
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CRS-300 1:10 Redundancy Switch
MN/CRS300.IOM
Switch Connectors and Pinouts
Revision 19
3–5
3.2.1.3 Remote Control Connector, DB-9M
The DB-9M Remote Control connector on the CRS-230 provides 2-Wire
EIA-232 and EIA-485 serial remote monitor and control access to the Switch.
Table 3-2. Remote Control Connector
Pin
Signal Function
Direction
1 Ground
---
6
EIA-485 Receive Data B (see note)
In
2 EIA-232 Transmit Data
Out
7
EIA-485 Receive Data A (see note)
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
---
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