3 D125B Dual Class B Initiating Module
Technical specifications
Mechanical Properties
Dimensions | 5 in. x 3 in. x 0.8 in. | ||
(H x W x D): | (12.7 cm x 7.6 cm x 2.0 cm) | ||
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Power Requirements (12 VDC Circuits) | |||
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Current (alarm): | 1 loop only: | 75 mA maximum | |
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| Both loops: | 145 mA maximum | |
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Current (standby): | 1 loop only: | 12 mA maximum | |
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| Both loops: | 24 mA maximum | |
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Voltage (nominal) | 12 VDC supplied by control panel or by | ||
| UL864 or UL1481 Listed 12 V power supply | ||
Power Requirements (24 VDC Circuits) | |||
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Current (alarm): | 1 loop only: | 168 mA maximum | |
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| Both loops: | 300 mA maximum | |
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Current (standby): | 1 loop only: | 25 mA maximum | |
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| Both loops: | 50 mA maximum | |
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Voltage (nominal) | 24 VDC supplied by UL864 or UL1481 | ||
| Listed 24 V power supply | ||
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Current (alarm): | 12 VDC: |
| >11.8 mA |
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| 24 VDC: |
| >24.1 mA |
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Current (trouble): | 12 VDC: |
| <3.5 mA |
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| 24 VDC: |
| <7.5 mA |
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Detector Current: | 12 VDC: |
| 3 mA maximum |
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| 24 VDC: |
| 7 mA maximum |
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Wiring Impedance: | 50 Ω maximum |
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Ordering information
D125B Dual Class B Initiating Module
The module provides 2 Class B (Style B) powered loops for connecting 12 or 24 VDC, two- or four‑wire fire or burglary devices or up to 50 two‑wire 12 VDC glass break detectors. It reports individual loop alarm or trouble and ground fault; and allows latching device reset from panel or central station.
Order number D125B
Accessories
D137 Mounting Bracket
Used to mount accessory modules in D8103, D8108A, and D8109 enclosures.
Order number D137
