Connecting a Scantronic 9448+ to an from Connecting a Scantronic 9448+ to an Eaton SDR-WEXT-00 external sounder

[SalopMan]

I need to connect these two but the right connections aren't clear (well, not to me anyway !) The 12v and 0v are pretty obvious but does anyone know what the BLA and BLF connections on the sounder relate to on this control box ? Diagrams and photo are attached.

Edited March 14 by MrHappy

[james.wilson]

first off be really careful with your stray cores. There should be nothing sticking out of the terminals like in the images. It will blow something. 

Id assume that bla is bell input

and blf is strobe

[SalopMan]

Thanks James. You're right about my connections of course, I need to be more careful.

I tried connecting 'Bell' on the control box to 'BLA' on the siren box and 'STR' on the control box to 'BLF' on the siren box. Also '12v' to '12v' and '0V' to 0V'. As soon as I power it up I get the 4 blue LED's strobing on the siren box plus a single red LED that flashes 3 times periodically. Opening a door contact starts the entry delay time and eventually triggers the internal sounder as it should but there is no change at the siren box at all and it just keeps flashing without sounding the siren.

I googled BLA and BLF and got a result that suggested that BLF was for a fire alarm connection but I'm not sure if this is correct.

If I could find a manual/instruction sheet for the siren it would help. The single sheet supplied with it doesn't explain what the various terminals are or what the LED patterns mean. I may try to contact the manufacturer to see if they can supply anything more enlightening.

[james.wilson]

i assume all tampers are closed on the bell?

[SalopMan]

Yes, and I've checked it with a meter this time !

 

 

[james.wilson]

OK that would be harder though as its the switches on the bell and there would be voltage on them. Is the tamper return from the bell at 0v?

[SalopMan]

The siren box is an Eaton SDR-WEXT-00 (also made by Scantronic I suspect). This was supposed to be in the heading to this topic but I missed it off somehow.

There's only one anti-tamper switch on the siren box which seems to trigger if either the lid is opened or the box is prised off the wall.

I've actually got it all to a state where it nearly works OK. I, surprisingly, got a response to an enquiry to Scantronic's support team. They confirmed that BLA is the Bell Trigger and BLF is the Strobe Trigger (as you said before). They also gave me a list of the meanings of the little red LED which, for the benfefit  of anyone looking at this in the future, are :

LED Flashes Every 7 Seconds :
One    Sounder all OK
Two    Low/loss of 12v
Three    Standby battery low
Four    Siren run time exceeded

 

The problems that remain are that

1) I can only get it to operate if I link TR to 0V on the control box (which presumably negates the anti-tamper connection to the siren box) and

2) The four blue LED's strobe all the time except for when an alarm is triggered, when the two middle ones go out and the outer ones flash brighter and simultaneously.

 

Am I right in assuming that the the four blue LED's should only be on during or after an alarm condition ?

 

 

[james.wilson]

2) sounds like your strobe is configured the worng way. It will need inverting in the panel if the panel is wrong or the bell etc

 

1) you are right to me means you have a tamper problem on the bell

[al-yeti]

9 hours ago, SalopMan said:

The siren box is an Eaton SDR-WEXT-00 (also made by Scantronic I suspect). This was supposed to be in the heading to this topic but I missed it off somehow.

There's only one anti-tamper switch on the siren box which seems to trigger if either the lid is opened or the box is prised off the wall.

I've actually got it all to a state where it nearly works OK. I, surprisingly, got a response to an enquiry to Scantronic's support team. They confirmed that BLA is the Bell Trigger and BLF is the Strobe Trigger (as you said before). They also gave me a list of the meanings of the little red LED which, for the benfefit  of anyone looking at this in the future, are :

LED Flashes Every 7 Seconds :
One    Sounder all OK
Two    Low/loss of 12v
Three    Standby battery low
Four    Siren run time exceeded

 

The problems that remain are that

1) I can only get it to operate if I link TR to 0V on the control box (which presumably negates the anti-tamper connection to the siren box) and

2) The four blue LED's strobe all the time except for when an alarm is triggered, when the two middle ones go out and the outer ones flash brighter and simultaneously.

 

Am I right in assuming that the the four blue LED's should only be on during or after an alarm condition ?

 

 

Can we see picture of siren connections and bell , and proper pictures please David Bailey stylee , if you remember him lol

[SalopMan]

I do remember David Bailey. I recently read his autobiography. It's very amusing.

 

Photos are attached.

As it stands, I get a tamper alert every time I power it up. Disconnecting the Tamper connection on the siren doesn't alter this.

If I insert a loop between TR and 0V on the control box then I don't get the tamper alert and I can set and unset the alarm and trigger the alarm by opening the door switch as expected.

All four blue LED's on the siren box are strobing as soon as the power is applied and nothing changes this state.

The single red LED on the siren box flashes once every 7 seconds which indicates that the "Sounder is OK".

It's going to be installed in an outbuilding with just a couple of door switches. I currently have one door switch connected to the EE terminals on the control box.

I have set Zones 1 to 6 to Not Used (option 15).