April 21, 201016 yr I am considering purchasing some sensors and require the red flashing light to be activated as a visual deterant when the alarm is ON and also when it is OFF. I am currently looking at the Viper GL-W thats says the LED is activated by LINK and the GLX-W that says is activated by SWITCH. Can you please explain what the difference is between LINK and SWITCH. Also, The GLX-W PC.09000-20 is priced at
April 21, 201016 yr Author David. A lin in this case is alink of wire between 2 terminals. A switch is an internal switch on the unit. A basic door / window contact is 95p http://www.securitywarehouse.co.uk/catalog/index.php?main_page=product_info&products_id=667
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