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GE Energy
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994-0089–1.00–2, General
4.3 RS-232 Connections
The D400 accepts connections to RS-232 type devices through the RS-232 Adapter. The
RS-232 Adapter (GE Part No. 520-0207) is a standard RS-232 serial I/O adapter card that
plugs into any serial communication slot (slots 1 through 8) on the D400. It contains two
independently isolated RS-232 serial ports (Port 1 and Port 2) each with a DB-9
connector.
The required RS-232 cable is a serial null modem, DB-9F to DB-9M cable. The cables must
be shielded and DB-9 connector covers must provide EMC shielding (e.g. metalized plastic
or die-cast metal covers).
See section “3.3 RS-232 Adapter” for configuration options.
» To connect RS-232 type devices to the RS-232 Adapter, use the following cable
connection:
Relay
1
5
6
9
1
5
6
9
2
3
5
7
8
7
8
2
3
5
RS-232 Port DB-9 Connector Signal Definitions
DTE (default) DCE
Pin
Number
Function Signal Flow Function Signal Flow
1 DCD IN DCD IN
2 RXD IN TXD OUT
3 TXD OUT RXD IN
4 DTR OUT DSR IN
5 Signal GND - Signal GND -
6 DSR IN DTR OUT
7 RTS OUT CTS IN
8 CTS IN RTS OUT
9 Not connected - Not connected -