What Does the W1 Jumper Do On the Honeywell DT8050A?

The Honeywell DT8050A W1 Jumper internally shorts Terminal 7 with Terminal 3. This allows you to use a single panel zone to monitor for alarm, tamper, and trouble/anti-mask conditions. If you plan to use separate zones to monitor any of these conditions, you must power down, and then cut W1.


The Honeywell DT8050A offers the patented DUAL TEC® capabilities of a Passive Infrared (PIR) sensor combined with a microwave sensor. This technology helps to prevent false alarms that might be caused by using a motion with only PIR technology. The environmental factors that often cause false alarms with a PIR, such as the rapid heating of a wall or other surface due to the sun coming through a window, will not cause the same issue for a microwave sensor. By only indicating an alarm when both the PIR and microwave sensor are activated, a false alarm for this type of situation can be avoided.

On top of its advanced motion-sensing features, the DT8050A also includes a tamper circuit and a trouble circuit. The tamper circuit is a normally-closed circuit that opens if the cover is removed, or if the tamper screw is properly installed in the mounting plate, and the DT8050A is then forcibly removed from the wall. The Trouble and Anti-mask circuit is also normally-closed and opens if a masking condition is detected, a malfunction is detected with the microwave portion of the sensor, or if input voltage to the motion detector drops below 7.9 Volts.

There are three (3) ways that the DT8050A can be wired while still using all of the available zone output features of alarm, tamper, and trouble. First, it can be wired using a single panel zone input. In this configuration, the W1 jumper will remain intact. If using the built-in EOLR feature, be sure that the appropriate dip switch for the resistor value to be used is ON, and that any other dip switches pertaining to the built-in resistors is OFF. It is a good idea to set the dips while the motion is powered down. As seen in the image below, when the W1 Jumper is intact, it puts a short between terminals 3 and 7. This basically puts all the internal zone outputs of the DT8050A in series with one another, allowing you to use them all with a single panel zone input. The drawback to using this configuration is that you won't be able to tell the difference between an alarm condition and a trouble condition at the alarm panel.

In the image below, we illustrate the short created between Terminal 3 and Terminal 7 of the DT8050A when W1 is left intact. In this example, we have the DT8050A set to use the 2K Ohm built-in EOLR, based on the dip switch setting. We are using the anti-mask feature, so we have that dip switch set to ON. This configuration allows us to monitor for Alarm, Tamper, and Trouble using a single panel zone.


The second way this motion detector can be wired is to use the Alarm Zone output as one zone, and to use the Tamper/Trouble outputs as a single zone together, for a total of two (2) zones being used. In this case, you want to sever the connection between the alarm output and the trouble output, so you must cut the W1 Jumper. There should be no power involved with this jumper, but it is still a good idea to make this cut while the motion detector is powered down.

As you can see in the image below, this configuration allows the internal EOLR to be used for the Tamper/Trouble zone, but the alarm zone will take a separate external EOLR assuming the panel requires one. In this configuration, you must manually place a jumper wire between Terminal 5 and Terminal 7. This wiring example assumes that the Alarm Zone and the Tamper/Trouble Zone will be connected to two separate zones that share a common negative. This is why the Tamper/Trouble Zone is not shown with a Common/Negative connection to the panel. It is assumed that it can use the same Zone Common as the Alarm Zone. For example, on the Honeywell VISTA-20P Panel, all of the zone negative terminals are common to one another, with the exception of Zone 1. Because Zone 1 is a powered zone, its negative terminal is isolated from the others.


Finally, the third way to utilize the DT8050A with all of its available zone outputs is by using three separate zones, one for each available output of Alarm, Tamper, and Trouble. Again, with this configuration, you will need to cut the W1 Jumper to sever the internal connection between Terminal 3 and Terminal 7. Once this has been done, the internal EOLR option is available only for the Tamper Zone output. If EOLR is required by the panel, then the Alarm Zone and the Trouble Zone will each require their own external resistor. The Tamper Zone and the Alarm Zone will share a Common terminal, and the Trouble Zone is wired separately with its own High and Low panel zone connection.


A word about the Remote LED Control terminal seen in all of the above images. The ability to enable or disable the LED remotely is not something most users will be interested in. Basically, the operation can be described like this; if the LED dip switch is set to OFF, then +12 VDC to Terminal 9, with reference to any common negative on the motion sensor will cause the LED to be ON. And 0 VDC to Terminal 9 will cause the LED to be OFF. If dip switch 2 for the LED is set to ON, then the DT8050A controls when the LED is ON or OFF, as well as what color the LED will show. See the Installation Instructions for a full explanation of LED operation when the LED dip switch is set to ON.

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