TROUBLESHOOTING
5 - 4
I-E96-225A
®
DB-9 EWS Port
The IMCPM03 provides a DB-9 connector inside the faceplate
on the circuit board for use as an EWS port. This port can also
be used for development and diagnostic purposes (refer to
Table
DIAGNOSTIC TESTS
The IMCPM03 module firmware contains diagnostic tests that
can be invoked from power up to test the operation of the mod-
ule components and circuitry. When in the diagnostic mode,
the IMCPM03 module does
not
function as an IMCPM03 mod-
ule. This section provides a brief description of each diagnostic
test and describes how to use them (refer to
).
1. Set pole 1 of SW3 to off (OPEN) to enable hardware diag-
nostics. Faceplate LEDs display the test results. SW2 selects
the group test or individual tests to be run.
Table 5-5. Computer Port Signals,
P4 Connector
Pin
Signal
1
Protective ground
2
Transmitted data (TXD)
3
Received data (RXD)
4
Request to send (RTS)
5
Clear to send (CTS)
6
Data set ready (DSR)
7
Common
8
Data carrier detect (DCD)
20
Data terminal ready (DTR)
Table 5-6. EWS Port Signals
Pin
Signal
1
Data carrier detect (DCD)
2
Received data (RXD)
3
Transmitted data (TXD)
4
Data terminal ready (DTR)
5
Ground
6
Data set ready (DSR)
7
Request to send (RTS)
8
Clear to send (CTS)
9
Ring indicator (RI)
