Posted: Wednesday Oct 29th, 2014 02:24 pm |
|
1st Post |
rodime
Comfort Installers
back to top
|
Hello,
We have a motion detector that has a TTL Open Collector Alarm Output. Is this able to work with comfort and if so what should be the zone type/config settings?
Thanks
|
Posted: Wednesday Oct 29th, 2014 03:30 pm |
|
2nd Post |
slychiu
Administrator
Joined: | Saturday Apr 29th, 2006 |
Location: | Singapore |
Posts: | 5493 |
Status: |
Offline
|
back to top
|
You can connect the open collector output to Comfort zone input. Connect the Zone Common to the ground/0V of the detector
Zone type is the same as a normal PIR ie PIR Night/away or PIR away
|
Posted: Wednesday Oct 29th, 2014 04:00 pm |
|
3rd Post |
rodime
Comfort Installers
back to top
|
Hi Chiu,
I did that, however the movement triggers a zone trouble alarm (using pirnightaway with security off). Is the fact that it is TTL output significant?
|
Posted: Wednesday Oct 29th, 2014 04:06 pm |
|
4th Post |
slychiu
Administrator
Joined: | Saturday Apr 29th, 2006 |
Location: | Singapore |
Posts: | 5493 |
Status: |
Offline
|
back to top
|
A zone trouble alarm is due to End of line resistors or lack of EOL resistors
If the zone shunt is in the double EOL position then you must connect the EOL resistors
If you do not want EOL resistors then move the shunts to the No EOL position
|
Posted: Wednesday Oct 29th, 2014 04:44 pm |
|
5th Post |
rodime
Comfort Installers
back to top
|
The shunt is in no EOL, we've not use EOL before and this is a new type of PIR. Could this be something built into the PIR requiring EOL? PIR documentation is non existent.
When testing the circuit, the movement triggers a pulsed output as opposed to a continuous close. Not sure if that is relevant.
|
Posted: Wednesday Oct 29th, 2014 04:56 pm |
|
6th Post |
slychiu
Administrator
Joined: | Saturday Apr 29th, 2006 |
Location: | Singapore |
Posts: | 5493 |
Status: |
Offline
|
back to top
|
Are you sure it is an Open Collector output? There may be a voltage connected to the output causing the zone trouble. A zone trouble is caused by external voltage at the zone input
Disconnect the detector from Comfort and measure the voltage between Open collector and common. When there is no movement, there should be no voltage, when there is movement the voltage should be close to 0
|
Posted: Wednesday Oct 29th, 2014 05:17 pm |
|
7th Post |
rodime
Comfort Installers
back to top
|
The documentation states it is a TTL alarm output and open collector 30ma max. Using a multimeter I get a reading of 3.4v when the movement triggers
|
Posted: Wednesday Oct 29th, 2014 05:23 pm |
|
8th Post |
slychiu
Administrator
Joined: | Saturday Apr 29th, 2006 |
Location: | Singapore |
Posts: | 5493 |
Status: |
Offline
|
back to top
|
3.4 Volts is not an open collector voltage when the transistor is on
anyway there seems to be a contradiction as a TTL output is not an open collector output.
TTL is a digital output > 3.4 volts high and < 2.0 volts low (but TTL logic should have gone extinct together with the dinosaurs)
An open collector output is a transistor output which is open circuit when off and pulled to 0V when on
|
Posted: Wednesday Oct 29th, 2014 05:50 pm |
|
9th Post |
rodime
Comfort Installers
back to top
|
ok, so assuming it is in fact a TTL digital output, can this be used with Comfort?
|
Posted: Wednesday Oct 29th, 2014 06:19 pm |
|
10th Post |
slychiu
Administrator
Joined: | Saturday Apr 29th, 2006 |
Location: | Singapore |
Posts: | 5493 |
Status: |
Offline
|
back to top
|
Try a digital n/c zone type
See if it can detect on and off
If so you can change the alarm type to make it trigger alarm
|
Posted: Wednesday Oct 29th, 2014 06:19 pm |
|
11th Post |
slychiu
Administrator
Joined: | Saturday Apr 29th, 2006 |
Location: | Singapore |
Posts: | 5493 |
Status: |
Offline
|
back to top
|
Try a digital n/c zone type
See if it can detect on and off
If so you can change the alarm type to make it trigger alarm
|
Posted: Wednesday Oct 29th, 2014 06:19 pm |
|
12th Post |
slychiu
Administrator
Joined: | Saturday Apr 29th, 2006 |
Location: | Singapore |
Posts: | 5493 |
Status: |
Offline
|
back to top
|
Try a digital n/c zone type
See if it can detect on and off
If so you can change the alarm type to make it trigger alarm
|
Posted: Wednesday Oct 29th, 2014 07:10 pm |
|
13th Post |
Posted: Thursday Oct 30th, 2014 08:15 am |
|
14th Post |
slychiu
Administrator
Joined: | Saturday Apr 29th, 2006 |
Location: | Singapore |
Posts: | 5493 |
Status: |
Offline
|
back to top
|
I think you will need technical information from the manufacturer on how to cxonnect to an alarm system
|
|