A technician working with a Bosch B9512G panel reports trouble wiring it up, noting that every newly installed point registers as a short despite using a setup that worked on previous Bosch POPIT installations.
Extracted from these lines
[comment u/Ok_Contest2893] Working with a bosch b9512g panel and this isn't working I've wired it the same way on other bosch panels with POPITS never had an issue but today on the panel it says there's a short on every new one we installed and wired th
“Rtfm”
u/loafglenn23 points · Oct 8, 2026View
“It's pretty straight forward. Green and red are 24VDC power. Red and black is your IDC from the zone or module. Then the black jumper connects the closed trouble relay to the alarm size before it goes through the resistor. So a trouble on the detector will open the circuit and show a trouble on the panel. Look up the wiring diagram for the 4120 and it's done the same way.”
u/horseheadmonster5 points · Oct 8, 2026View
“Where they're meant to go”
u/EvilMonkey85212 points · Oct 8, 2026View
“Power (presumably 24vdc) connected to + and - terminals respectfully. Zone ckt or monitor ckt connect to alarm terminals with one leg passing through the trouble contacts. Install resistor on alarm terminals. It’s always best to understand the system that you are working on. That way you can apply that to any situation, instead of relying on specific instructions for any given scenario. Best of lu”
u/realrockandrolla1 points · Oct 8, 2026View
“Yea basically resistor lands on normally open on alarm and Sup and jumper from common to common on alarm and Sup. Then your wires from the module land on the alarm contacts. Working with a bosch b9512g panel and this isn't working I've wired it the same way on other bosch panels with POPITS never had an issue but today on the panel it says there's a short on every new one we installed and wired th”
u/Ok_Contest28930 points · Oct 8, 2026View
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"summary": "A technician working with a Bosch B9512G panel reports trouble wiring it up, noting that every newly installed point registers as a short despite using a setup that worked on previous Bosch POPIT installations.",
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"excerpt": "It's pretty straight forward. Green and red are 24VDC power. Red and black is your IDC from the zone or module. Then the black jumper connects the closed trouble relay to the alarm size before it goes through the resistor. So a trouble on the detector will open the circuit and show a trouble on the panel. Look up the wiring diagram for the 4120 and it's done the same way.",
"posted_at": "2026-10-08T06:33:56.000Z",
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"excerpt": "Power (presumably 24vdc) connected to + and - terminals respectfully. Zone ckt or monitor ckt connect to alarm terminals with one leg passing through the trouble contacts. Install resistor on alarm terminals. It’s always best to understand the system that you are working on. That way you can apply that to any situation, instead of relying on specific instructions for any given scenario. Best of lu",
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"excerpt": "Yea basically resistor lands on normally open on alarm and Sup and jumper from common to common on alarm and Sup. Then your wires from the module land on the alarm contacts. Working with a bosch b9512g panel and this isn't working I've wired it the same way on other bosch panels with POPITS never had an issue but today on the panel it says there's a short on every new one we installed and wired th",
"posted_at": "2026-10-08T09:12:55.000Z",
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"[comment u/Ok_Contest2893] Working with a bosch b9512g panel and this isn't working I've wired it the same way on other bosch panels with POPITS never had an issue but today on the panel it says there's a short on every new one we installed and wired th"
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