VX4353 Page A – 17
Digital Multi-Meter Connection and Set Up
1. Connect the DMM signal high and input + side to the “pig tail” that is connected to
the VX1780S connector pin-1.
2. Connect the DMM signal low and input – side to the “pig tail” that is connected to
the VX1780S connector pin-2.
3. Set the DMM to the 4 wire Ohms mode, and select autorange.
Testing The Relay Resistance
1. Send “C0lf” (Set relay CH00) to the VX4353.
2. Send “Q0lf” (Query relay CH00) to the VX4353.
3. Read “1 crlf” (Relay CH00 is closed).
4. Verify that the DMM reads less then 300 milliohms.
5. Send “O0lf” (Open relay CH00) to the VX4353.
6. Send “Q0lf” (Query relay CH00) to the VX4353.
7. Read “0 crlf” (Relay CH00 is Open).
8. Verify that the DMM reads greater than 10 gigohms.
9. Repeat steps 1. through steps 8. for relays CH01 through CH15.
a. Substitute Cxlf and Oxlf for the appreciate relay. (x = relay to close or open).
10. Remove the connector from P4 and plug connector into P5.
11. Repeat steps 1. through steps 8. for relays CH16 through CH31.
a. Substitute Cxlf and Oxlf for the appreciate relay. (x = relay to close or open).