Nortek Security and Control KB

Open Collector Output

Open Collector Output

The DXSR-1504, DXSR-1508, and the SXR-64A receivers have what is known as open collector outputs. In an open collector output, a transistor shorts to common when the output is triggered (Normally Open output), or the output shorts to common through the transistor and goes open when triggered (Normally Closed output). Open collector output is not a new technology and has been used in Linear receivers for more than 20 years. Most alarm panels will recognize open collector output providing certain precautions are taken. These precautions include keeping the distance between the receiver and the panel within ten feet; closer is better, and the output should be the only trigger on a zone.

One way to get around the distance limitation as well as not sharing a zone is to use an Altronix RBSN relay on the output of the receiver. The RBSN only draws 10 mA, and the contacts are rated at 2 Amps. The RBSN is connected with the plus side of the coil connected to the plus 12 Volt power input of the receiver. The minus side of the coil connects to the desired channel output of the receiver with the receiver set to Normally Open output (see drawing below). This setup will give you a dry relay contact output.

See attachment below:

0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
There are no comments for this article. Be the first to post a comment.
Security Code Security Code
Related Articles RSS Feed
The relay chatters when I trigger the door strike
Viewed 2545 times since Thu, Apr 12, 2012
How do I program my MDTK keypad?
Viewed 4845 times since Mon, Mar 29, 2010
What products will Multicode work with?
Viewed 3840 times since Mon, Mar 29, 2010
How much and what type of voltage does my receiver use?
Viewed 2744 times since Thu, Apr 8, 2010
How do I program my DTKP keypad?
Viewed 3933 times since Mon, Mar 29, 2010
How do I increase the range on my radio receiver?
Viewed 12376 times since Thu, Jun 23, 2011
Program a MCS420001 Keypad
Viewed 3985 times since Mon, May 16, 2011
How do I make my clicker brand transmitter work with my Linear garage door operator?
Viewed 4529 times since Mon, Mar 29, 2010
How do I program my Stanley keypad?
Viewed 21826 times since Thu, Apr 1, 2010
How do I program my MVP keypad?
Viewed 5285 times since Wed, Apr 7, 2010