Procom RS232, RS485 warranty Troubleshooting

Chapter 3 TROUBLESHOOTING

A very easy way to troubleshoot these boards is to use a jumper wire to join together the BLUE and WHITE lines and another jumper wire to connect the BLACK and YELLOW lines on the 6 position terminal strip. (Make sure you have no other devices connected on the RS485 lines and disable the local echo function on the terminal emulation program.) This results in a closed loop and therefore whatever you type on a computer terminal emulation program (such as Procomm, Hyper Terminal or Windows Terminal) should be echoed back to the screen if the board is working properly. If the echo-on feature in the program is selected, then you would get each character twice.

The Baud rate as well as the number of bits or the stop bit are all irrelevant. Should it not work properly, the first thing to check is that the board is powered properly, and secondly, to move the jumpers to the appropriate positions on both H1 and H2. (Note: The jumpers should always be both on the same relative positions. That is, closing either pins 1-2 with both H1 and H2 or 2-3 with both jumpers.)

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