User's Manual

Document # 6045000 Rev 1.0 PRELIMINARY
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LED Indicators:
The converter is equipped with three status LEDs with the following functions:
LED1: Power LED (green). This LED indicates the unit is powered.
LED2: RX LED (yellow). This LED indicates data is being sent from the PC to the device.
LED3: TX LED (yellow). This LED indicates data is being sent from the device to the PC.
Performing the Loopback Test
If you are unable to communicate to your device there may be a problem with the RS-232 connections to the
converter. On the converter board there is a loopback jumper labeled J2, which is next to the RJ-11 jack (see
diagram above). To access the jumper you must remove the cover on the converter. Use this jumper and the
COM port test supplied with Hub Manager PC software to perform this test. Follow the steps below to perform
the loopback test.
1. Power down the RS-232 to RS-485 converter.
2. Start the COM port test
3. Verify the COM port you are using is available for use.
4. When the COM port test tells you to connect the loopback connector, place the J2 jumper cap on both
pins. The 6 foot straight cord must be connected to J1 on the converter before continuing.
5. Continue with the test and verify the COM port you are using says “Test Connector Found”
6. Remove the J2 jumper cap and place it on one pin.
If the COM port test passes then you have verified that the RS-232 connection from the PC to the RJ-11 jack on
the converter is functioning properly. This test only tests the COM port, serial cable (if used), DB connector, 6
foot straight cord and the RJ-11 jack on the converter. This test does not test the RS-232 to RS-485 converter
itself or the RS-485 connection to your device.
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