Hi,
This has to be the bell with the worst documentation around. Plus Eaton have the installer manuals behind a "you have to register" wall (why?) so you can't even see how it is wired up in their alarms to work out what is happening. Hence I'm posting this to anyone else with problems.
1) For some reason the pin out is not labelled Bell or Trigger, not strobe either. Instead we have BLA (which is bell/trigger) and BLF (which is strobe). No where does it define what BLA or BLF mean, WTF!
2) The signals BLA and BLF are configurable to High input or low input required. But required for what? To trigger? or not to trigger? Normally you define the active signal which would be that High input required means to High input required to trigger, in which case the table is backwards. Very helpful, not!
3) The alarm I was trying to use this bell on is an Accenta 8. The bell output is 12V live on one pin with switched 0V on the other pin. Hence the second pin is used as trigger and the trigger condition is when pulled low. Strobe is the same. BLA/BLF do not like open collect outputs as their inputs don't seem to have pullups so they don't get pulled to active. I had to add pullup resistors across the strobe output and across the bell output in the control panel in order to get BLA/BLF to recognise a high. I used 12K as I reckoned 1mA should do and it did.
It was really great fun climbing up and down a ladder 20 times trying to sort out this bell. Firstly working out that links made no difference, bell was always on, then working they must be backwards, and finally working out that a pullup was needed. And this is Bell whose instructions say "designed for use with other 3rd party control units). Yeah right, so why not use the standard descriptions.
This has to be the bell with the worst documentation around. Plus Eaton have the installer manuals behind a "you have to register" wall (why?) so you can't even see how it is wired up in their alarms to work out what is happening. Hence I'm posting this to anyone else with problems.
1) For some reason the pin out is not labelled Bell or Trigger, not strobe either. Instead we have BLA (which is bell/trigger) and BLF (which is strobe). No where does it define what BLA or BLF mean, WTF!
2) The signals BLA and BLF are configurable to High input or low input required. But required for what? To trigger? or not to trigger? Normally you define the active signal which would be that High input required means to High input required to trigger, in which case the table is backwards. Very helpful, not!
3) The alarm I was trying to use this bell on is an Accenta 8. The bell output is 12V live on one pin with switched 0V on the other pin. Hence the second pin is used as trigger and the trigger condition is when pulled low. Strobe is the same. BLA/BLF do not like open collect outputs as their inputs don't seem to have pullups so they don't get pulled to active. I had to add pullup resistors across the strobe output and across the bell output in the control panel in order to get BLA/BLF to recognise a high. I used 12K as I reckoned 1mA should do and it did.
It was really great fun climbing up and down a ladder 20 times trying to sort out this bell. Firstly working out that links made no difference, bell was always on, then working they must be backwards, and finally working out that a pullup was needed. And this is Bell whose instructions say "designed for use with other 3rd party control units). Yeah right, so why not use the standard descriptions.
