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Communication Port Test
Pin# Signal Name
1
Not Used
2
Receive Data (RD)
3
Transmit Data (TD)
4
Not Used
5
Signal Ground
6
Not Used
7
Not Used
8
Not Used
9
Shield
Use the communications test to verify the operation of the RS-232 or
RS-485 port.
The communications test requires a loopback connector. You can construct a
simple loopback connector as follows:
RS-232 Port
9 Pin Female
Loopback Connector
Connects pins 2 !3
To test the communications port:
1. Use the [NEXT] and [PREV] keys to display Comm on the
test selection screen.
2. Press [
The DTAM Micro will continuously send out and receive a message at
the same port. The message is DTAM Micro self looping serial test
ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.
3. Press any key to terminate the communications test.
The next test selection screen is displayed.
4. To terminate the test function , press the [NEXT] and [PREV] keys to
display Reset DUT in the test selection area. Press [
terminal.
Chapter 8
Troubleshooting and Maintenance
Pin# Signal Name
1
Data Out –
2
Data Out +
3
Data In -
4
Data In +
5
Signal Ground
6
Transmit Enable
7
Not Used
8
Signal Ground
9
Shield
DTAM Micro Diag Test
Comm Test
] to initiate the test.
DTAM Micro self loop
ing serial test ABCD
DTAM Micro Diag Test
RAM Test
RS-485 Port
9 Pin Female
Loopback Connector
Connects pins 1 !3
and pins 2 ! 4
] to reset the
8–9
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