Viper - no LED (EOL Resistor??)

[Dibsh]

I have a Texecom R8 panel with a few Vipers (GLX).

Originally the Vipers where wired in series using 6 core on one zone with double knock enabled and the LED enabled. All worked well.

I decided I wanted to wired them using 8 core to enable the remote LED control.

Wired them exactly the same but using the SW+ from the panel to the SET on the Wiper. Wired with Alarm and Power (& Tamper) setting both DIL switches to ON - the LED flashes fine and goes off when triggered. Switch 1 obviously does the Double Knock.

Also the wipers are wired together using 1 core between their FTA contacts. The last Viper has a resistor going across +12v and FTA as per the instructions.

Just for testing purposes I plugged the SET core into the +12v at the panel rather than fart about with SW+. Checked at the Vipers -

- between 0 & 12v the reading is 13v
- between 0 and SET is 13v
- continuity exists between both ALARMs until triggered.

At this point I expect the LED to flash and remain flashing, but it doesn't.

Any ideas.

Cheers.

 

[Dibsh]

Update - just spoken to Honeywell Tech Support.

The way 7 core (Remote LED) works is that SET has to see 0V then 12V (when the system is armed), if the system is triggered, upon un-setting the system at the keypad, the triggered zone should light up, looking at the Vipers - the triggered one will be flashing.

A RESET of the system will wipe the Viper's "memory".

8 Core FTA - as I thought. It's just the supply to the SET that caught me out. It needs go from 0v to 12V and 0v - just connecting 12v and then removing 12v means it never sees 0v.

Thankfully it's been left with the SET wired to the SW+ in the panel - so should be OK. But will check again this evening using a flylead using both 0v and 12v to the SET.

 

[Dibsh]

Checked the Vipers last night and using a flylead to connect SET to 0v and 12v the Viper behaved as expected. Even the FTA bit.

The one thing I am stumped with is in the instructions - for 8 core (remote LED and FTA), it mentions that all the Vipers (GLX) have the FTA terminals connected together , but not going back to the panel, with an EOL resistor fitted to 1 Viper (GLX) - between 12v and FTA.

Now I'm assuming this is not EOL in the traditional sense - as in EOL vs DP, so it must be EOL in the context of wiring a Viper, which are wired DP. But fitting this resistor as instructed (between 12v and FTA) resulted in the FTA and remote LED no longer working. So I left it out - but it does beg the question, if FTA works without it, why include it and instruct that it gets fitted between FTA & 12v?

Can anyone shed any light on this "EOL" resistor?

Many Thanks

Dibs


p.s. The instructions I am referring to are - http://www.screwfix.com/sfd/i/cat/pdfs/68/p4754968.pdf