| Technical standard | Meet the requirements of GB 26851-2005 |
| Operating Voltage | DC18V～26V |
| Monitor current | DC24V ≤2.5mA |
| Alarm current | DC24V ≤70mA |
| Sound level | 75dB～90dB |
| Line system | Two power bus 24V, GND (with polarity) |
| Installation method | Exposed wall mounting |
| Operating temperature | -10℃～+55℃ |
| Relative humidity | ≤95% |
| Dimensions | 88mm×41mm×88mm（L×W×H） |
| Weight | About 92g |
Wiring diagram for SM5Ei/A Fire audible and visual alarm base
Wiring instructions
2, 4 terminal: 24VDC power (with polarity)
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ICP 11076333-1
Automatic fire 
Electrical fire 
Fire door monitoring 
Fire equipment 
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Emergency broadcast and 