The output signals must meet the following requirements:
l
Current type
–
When liquid is not detected, the output current should be less than 200 uA.
–
When liquid is detected, the output current should be greater than 1 mA.
l
Voltage type
–
When liquid is not detected, the output voltage should be less than 3.3 V.
–
When liquid is detected, the output voltage should be greater than 5 V.
l
Dry contact point type
–
When liquid is not detected, the sensor should be disconnected.
–
When liquid is detected, the sensor should be connected.
Requirements for the Specifications of Self-Selected Door Status Sensors
Working voltage: 12 V
The output signals must meet the following requirements:
l
Current type
–
When the door is closed, the output current should be less than 200 uA.
–
When the door is open, the output current should be greater than 1 mA.
l
Voltage type
–
When the door is closed, the output voltage should be less than 3.3 V.
–
When the door is open, the output voltage should be greater than 5 V.
l
Dry contact point type
–
When the door is closed, the sensor should be connected.
–
When the door is open, the sensor should be disconnected.
Requirements for the Specifications of Self-Selected Smoke Sensors
Working voltage: 24 V
The output signals must meet the following requirements:
l
Current type
–
When smoke is not detected, the output current should be less than 200 uA.
–
When smoke is detected, the output current should be greater than 3 mA.
l
Voltage type
–
When smoke is not detected, the output voltage should be less than 3.3 V.
–
When smoke is detected, the output voltage should be greater than 5 V.
l
Dry contact point type
–
When smoke is not detected, the sensor should be disconnected.
–
When smoke is detected, the sensor should be connected.
Requirements for the Specifications of Self-Selected Infrared Status Sensors
Working voltage: 24 V or 12 V
3 Introduction to the Sensors
EMU
User Guide
3-10
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 13 (2009-12-30)