Guest HiTech Posted September 28, 2003 Posted September 28, 2003 I did a bell test for the fist time in years. Not surprisingly, it didn't ring. After tracing the correct cable/wiring, I decided to measure a few output voltages from the control panel. Here's what I found: In Day mode: BEL = 0V, SCB = 0V In BELL Test mode: BEL = 12V, SCB = 0V I've done a continuity test on all wires and they're fine. Are the o/p's what you would expect? What is SCB used for, because I get different readings when the Tamper switch is activated on the Bell Box, i.e. BEL = 0V, SCB = 5V? The strobe works OK, so is it the control panel at fault or is a new Bell box the answer? Hope you can help.....
Service Engineer Posted October 1, 2003 Posted October 1, 2003 In Day mode you should have: 0 Volts at Tamper Return (SCB T) 0 Volts at Tamper Feed (Hold -) (SCB A) 0 Volts at Trigger (Bell -) 12 Volts at 12V + Terminal (Bell +) In Bell Test Mode, you should have as above but with 12 Volts at the Trigger Terminal. ........................................................ Dave Partridge (Romec Service Engineer)
Guest HiTech Posted October 10, 2003 Posted October 10, 2003 Thanks for your help. It was the bell box at fault.
Recommended Posts
Archived
This topic is now archived and is closed to further replies.