Huawei EMU User Manual page 44

3 Introduction to the Sensors
The output signals must meet the following requirements:
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Requirements for the Specifications of Self-Selected Door Status Sensors
Working voltage: 12 V
The output signals must meet the following requirements:
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Requirements for the Specifications of Self-Selected Smoke Sensors
Working voltage: 24 V
The output signals must meet the following requirements:
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Requirements for the Specifications of Self-Selected Infrared Status Sensors
Working voltage: 24 V or 12 V
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Current type
When liquid is not detected, the output current should be less than 200 uA.
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When liquid is detected, the output current should be greater than 1 mA.
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Voltage type
When liquid is not detected, the output voltage should be less than 3.3 V.
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When liquid is detected, the output voltage should be greater than 5 V.
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Dry contact point type
When liquid is not detected, the sensor should be disconnected.
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When liquid is detected, the sensor should be connected.
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Current type
When the door is closed, the output current should be less than 200 uA.
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When the door is open, the output current should be greater than 1 mA.
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Voltage type
When the door is closed, the output voltage should be less than 3.3 V.
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When the door is open, the output voltage should be greater than 5 V.
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Dry contact point type
When the door is closed, the sensor should be connected.
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When the door is open, the sensor should be disconnected.
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Current type
When smoke is not detected, the output current should be less than 200 uA.
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When smoke is detected, the output current should be greater than 3 mA.
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Voltage type
When smoke is not detected, the output voltage should be less than 3.3 V.
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When smoke is detected, the output voltage should be greater than 5 V.
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Dry contact point type
When smoke is not detected, the sensor should be disconnected.
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When smoke is detected, the sensor should be connected.
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EMU
User Guide
Issue 13 (2009-12-30)