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I did option 61-Diagnostics again. RIO 0 13.74V 0.21A RIO 1 13.74V 0.20A Lowest battery voltage on last test: 13.27V Battery is completely charged with 13.95V, drawing 0.00A When charging, battery is 13.74V, drawing 0.06A Voltage in all 16 zones between 13.79 and 13.81V Everything looks fine to me. Next step, I'll disconnect detectors one at a time and see. Then I will begin changing cables. It might take a long time before I take any conclusion. Thank you so much Tech6. If any new hint comes to your mind, please let me know.

I was just wondering if the panel is close to current limit. From what your saying i dont think its incompatible sensors. Ive not seen what your experiencing other that with interference on the cables/damage or overloaded psu's If it were sensors being id expect it to happen often.

I had 2 external bells, 1 voice communicator, etc. But I also have an external Elmdene PSU. I was very careful balancing the loads, between the panel PSU and the external Elmdene PSU. Anyway, everything (bells , communicator, Elmdene PSU, RIOs) is now disconnected for testing purposes, except 12 zones wired to detectors, contacts and panic buttons and one keypad. And only 9 of those 12 are detectors (I assume door contacts and panic buttons haven't power consumption). So it can't be an issue of excessive load on the panel PSU side. The issue isn't reproducible, and it is kinda rare. Sometimes it is logged one, to three times in one of the zones during the 14 days log, but sometimes it's not logged in 14 days at all. Also it can occur in on particular zone today and for months it will not occur again with that zone, but it will with another zone. Very difficult to track down. The diagnostics showed a voltage of around 13,7 V in the peripherals. I don't remember the current, I'll check when I get back home.

if you have cable damage or voltage on a single circuit leg it can affect 4 or 8 circuits (usually 4). If its not reproducable its going to be difficult to track down. If its happening very often it will be easier to track. You can also try chnaging your response time (default is 300m/s) but if you make it faster while testing it may help find and make it reproducable. I assume all peripherals are run from the panel psu, and its anywhere near its limit? ie what are your charging voltages and day mode current. Also what sounders, speakers strobes do you have connected to the outputs?

No. There are 16 onboard (in the panel PCB) zones. I also have 2 RIO expanders, each with 8 more zones. But these RIOs are now disconnected, so I presently have 16 functional zones. High resistances were registered in zones of the RIOs but also in onboard zones. It seems to be an electrical issue that affects all zones. Since the problem persists after I disconnected the RIOs, I can conclude that the electrical problem comes either from the panel or from the detectors wired to the panel. One thing that puzzles me: detectors normal resistance is around 1k Ohm, because of the 1k Ohm resistor. High resistances logged are frequently 1297 Ohm. I swapped the 1k Ohm resistor by a 930 Ohm resistor in some detectors and still high resistances of 1297 Ohm were logged after that.

ok so we have a single detector that you can reproduce the error on?

Firstly, thank you for keep trying to point solutions. Power supplies seem to be good. Option 61 - Diagnostics say everything is ok. Anyway, I changed to a new battery, tested with and without backup battery connected, doesn't make a difference. Not sure what you mean. If expanders are the external RIOs, I'm now testing without them and the problem persists.

It's the design of the detector however doesn't usually affect eol circuits Prove the cable or swap inputs first to see if it's a damaged expander. Also ensure the power supplies are good batteries charge voltage etc

Can you explain how to do this?

No I doubt its the Panel if the rios are reporting it. the line should be irrelevant i wouldnt worry about that. id prove the detector line first by just using a resistor. then id confirm the detectors dont have a cap between alarm and tamper lines then if its just one detector type id drill that down

I've already done dozens of tests. I've a GD-96, two external RIOs, three keypads. High resistance happened with the onboard zones and with RIO's zones. One RIO was in Line1, the other in Line2. Swapped the RIOs, no luck. Disconnected one RIO at a time, changed the cable from RIOs to panel, changed the cable route (RIOs are 3m away from the panel), ended testing with just the panel and one keypad, tried different keypads, disconnected detectors by brand. Nothing works. I believe I have a faulty panel and I'm willing to buy a new one. But I'd like to confirm the information of the incompatibility with detectors with SSR first. Have you ever heard of that?

no its not common. Id be doing some tests on the cable etc. Or move the circuit or swap 2 devices over first

The problem is, if I go through the max/min resistances registered in the last 14 days log, in all zones, most of the days max resistances are OK (near 1K). But sometimes, in one of the 16 zones, there is one day out of the 14 logged days with a HR near 1.3K (frequently it is 1297 Ohm). This is a zone random issue and it happens occasionally. The problem is that sometimes it gets higher than 1.3K. I've never seen it in a spare (closed with 1K resistor) zone though. Also, doesn't seem to happen if all 16 zones are closed with 1K resistors at the panel. It seems to be more frequent the more the number of detectors I have wired and less frequent in zones without detectors (eg door contacts, panic button). Any ideas? Do you know if Galaxy panels are prone to this issues, because of the "common rail 0v on a Galaxy" you mentioned?

id say not an issue. HR is high res reported by the panel assumming your 1k 1k the panel is seeing about 1.3k (ish) thats showing to me a different issue

Sorry, can you explain the meaning of "hr issues on the galaxy"? Such as? So this isn't an issue, right? I have several DT detectors brands and the only ones that I suspect that don't have SSR are C&K Systems DT-400T. My most recent DT detectors (Bosch Blueline Tritech and Risco WhatchOut) have SSR. Also have Out-Smart (Maximum Security) DT detector, and Texecom Exodus 4W Series and Cooper Security M12 smoke detectors, but don't know what kind of relays they have. Thanks.

id be looking at the hr issues on the galaxy first. Its mostl likly to support these You can use common rail 0v on a Galaxy you cant on most panels. Can you post an example of your detectors?

Hi. I have random high resistances in most zones of a Honeywell Galaxy Dimension. I would like to replace my panel with a new one, but I've been told these panels are incompatible with detectors that have solid state relays (and I have several of these). Can anyone confirm this information? Thanks.

I have been looking on your website for some standalone smoke/heat detectors for use in a boiler house. Could you confirm that the relay output is volt free and can be used to connected to remote PLC digital input card (24VDC). Aritech Photoelectric Smoke Detector with c/o relay output Do you do a range that is more suitable for an industrial installation like a boiler house? It has to be standalone and dual heat and smoke and have the facility to repeat the alarm remotely via a relay output?

Some manufact do supply cases only. I'd have to find out tomorrow

Hi Recently changed windows from Brown to White So does anyone know if I can buy white outers for the Sensors and Magnets above as the Brown ones will look really "odd" on white windows Many thanks jt

Did find this though Honeywell Galaxy Rs 232 Connection Help - Introduce Yourself - Security Installer Community (thesecurityinstaller.co.uk)

I use an asix based one. Id have to check with honeywell if there is official recommendation but i wouldnt be hopefull, iirc they dont support serial over usb

It just stays stuck at the connecting stage, then times out. Lights on the USB 232 kits flash after hitting connect, i guess form RSS tool requesting hand shake, then stop when it times out. I lowered rate below 9600, still no change. Same panel direct 232 on my older laptop (no USB) works fine. So am looking for a known working USB cable make please. Cheers John

Are you getting any traffic?

What USB to 232 cables are people using for G2 compatibility? It seems that my dimension USB cable will not play ball with the G2 panel. Works fine for dimension panels and associated 232 cable, just not the G2 panel and cable., Thanks John