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© Sealevel Systems, Inc. 7106e Manual | SL9268 11/2022
Appendix A – Troubleshooting
Once you have confirmed that the serial adapter COM ports are listed in Device Manager, use the Sealevel
WinSSD utility to verify communications. Detailed help is included in the WinSSD utility.
Please set the adapters Electrical Interface for either RS-232 or RS-422.
If you have a loopback plug, put it on the adapter connector. If you do not have a loopback plug, you can
use female jumper wires to make the connection to verify the functionality.
RS-232 requires pins 2 (Receive) & 3 (Transmit) to be jumpered as shown in this graphic:
If you do not have a loopback plug or jumper wires handy, you can use a metal device such as a
knife, screwdriver, key, or paperclip to short pins two and three.
RS-422 requires pins 14 & 16 (T and ) and also pins 2 & 3 (Transmit- and Receive-) to be
jumpered as shown in this graphic:
