Dippy Posted October 19, 2013 Posted October 19, 2013 I have an expanded Texecom Premier 88 which I installed myself. I now want to add some external PIRs and apart from the fact that the Texecom ones are relatively expensive, they are unsuitable for my needs anyway. I have identified a suitable sensor, but it does not have a volt free contact. From the information in my Texecom installation manual it appears that it is designed to only accept zone sensors with VFC. Nevertheless does anyone know if I can use one with a solid state output instead? According to the sensor spec, it has a 22K pull-up resistor to 12V on the output, and has a transistor to switch a 100 ohm resistor to 0V when active. I made some measurements on one of the single contact zones (normally used for a fire sensor) and got 5V on the second 'T' terminal. When the fire sensor (N/C) was reconnected that terminal read 0V. Does anyone know if connecting that terminal to 12V via the 22K resistor would cause a problem? If so maybe I can modify the sensor to turn it into an open collector output, but of course I'd like to avoid that if possible.
Serg Posted October 19, 2013 Posted October 19, 2013 I may suggest what correct option is to fit 12V relay board what gives you dry NC-NO contacts for Prem. 88. Fitting it in Prem 88 case should not be a problem.
james.wilson Posted October 19, 2013 Posted October 19, 2013 As above use a t relay securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
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