Click or tap on image to enlarge. This cable is usually manufactured with the colors red, black, green, and yellow or white for the individual wire insulation. Then, connect the necessary wiring to the appropriate pigtails using wire nuts. The typical wiring used for any devices requiring data, such as keypads, is 4-conductor jacketed cable. Just answer a few questions below, and you’ll receive your quotes via email.

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Ademco Vista 20P

These quotes are absolutely free! The Ademco Vista 20P has the capacity for 8 on-board zones using basic connections. Rest assured that this compensation does not influence my recommendations. Learn about me, how I built this site, and how you can build one of your own! For more details on wiring ademci detectors, see: Note that addmco Ademco Vista 20P, like many other panels, can be programmed to not use end-of-line resistors on burglary zones.

Ademco Sirens

To find out how much a new system might cost, get some free price quotes from alarm dealers in your area. Shorting out the transformer can easily blow its internal fuse, turning it into a paperweight. Click or tap on image to enlarge. These commissions don’t change the price that you pay.

Ademco Vista 20P Wiring Diagram

Connect data leads from keypads, zone expanders, or other data devices. To fix this issue, connect a single short pigtail of gauge wire to each terminal, preferably using red for positive and black for negative. This page explains how to make connections to the terminals on a Vista 20P. Check out my alarm system manual sources page to find free installation and programming manuals for the Ademco Vista 20P as well as other brands of alarm panel.


Professional alarm installers can even use the Vista 20P for custom designed security systemsdue to its many features and programming options. This is done mainly to simplify the layout of the control board, as well as to save space. If you happen to have a convenient earth ground near the alarm panel, go ahead and connect to it.

siren test for vista 20p

If you have an older Ademco system that’s starting to have problems, you may be thinking about replacing it. More information on Honeywell Security Systems. This provides a supervision alert from the keypads in case of a ademfo fire wire.

While making connections, either leave the transformer unplugged, or keep the wires separated. Top of Page Top. The Ademco Vista 20P diagram inside the lid indicates the standard colors for each screw terminal, making things easy. Basic kits are inexpensive, flexible, and widely available on the web. The pair sending dial tone back to the premise phones should connect to the opposite pair of terminals, colored brown and gray.

The idea is that a voltage surge will tend to travel across spark gaps and other protective devices built into the circuit board, trying to reach ground potential. The Ademco Vista 20P has very good built-in lightning protection, even without an earth ground connection. Also, I highly recommend that you download a free copy of the complete Ademco manual, which will include a full-size image of the wiring diagram. All trademarks are the property of their respective owners.


If these wires are hooked up backwards, the panel will seize the wrong side of the telephone feed.

I only endorse products and services that I truly believe to be an honest value for you, as a visitor to my site. Include at least one Ademco keypad to make advanced programming easier. When wiring the RJ31X jack, be sure the pair of wires feeding phone line in to the jack goes to the red and green screw leads. This site is supported through affiliate marketing. This can be used for sirens, bells, strobes, or other devices up to the rated output.

Then, connect the necessary wiring to the appropriate pigtails using wire nuts. The Ademco Vista 20P also supports 4-wire smoke alarms, but a relay will need to be added.