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Troubleshooting Transponders, Points, Receivers, and Alert
Units
Common Errors
1.
Wrong type of cable. You must use twisted pair cable. Common errors are that twisted pairs are not used or that
separate wires from more than one pair is used.
Check to see if + and – are reversed or if TX and RX are reversed.
2.
3.
The correct connections from the SE485 to the Transponder are: RX+ to TX+ and RX- to TX-.
4.
The cable should be straight through to your computer serial port connector. Do not use a null modem cable or a
cable marked for printer use.
5.
Switch set in the wrong position.
6.
DIP switch settings incorrect.
7.
Power Jumper not on.
8.
ON/OFF switch not ON.
9.
Wrong point address.
10. Forgot to put on the tamper spring.
1
3
SE485
4
5
7
Security Escort Training
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Transponder
2
10
Receiver
6
8
9
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