Huawei ECC500 User Manual page 35

ECC500
User Manual
Table 3-13 Description of ports on the front panel of the AI/DI module
Silk Screen
COM_IN
COM_OUT
AI/DI_1 to AI/DI_8
The AI/DI module is configured with a 4-bit DIP switch. Set toggle switches 1 to 3 to
configure the address of the AI/DI module, and set toggle switch 4 to enable or disable the
resistance for the RS485 port.
address and the DIP switch settings.
Table 3-14 Mapping between the AI/DI module address and the DIP switch settings
Address
1
2
Issue 03 (2020-01-06)
SW1
OFF
ON
If the signal quality is poor due to signal reflection, set toggle switch 4 to ON for the farthermost AI/DI
module. After the DIP switch settings are modified, power off and restart the AI/DI module for the new
settings to take effect.
Copyright © Huawei Technologies Co., Ltd.
Port Description
Cascading ports. COM_IN connects to the RS485 expansion
card, and COM_OUT connects another AI/DI module.
Pin definitions of the ports are the same as those of the COM4
port on the communication card.
Provide 12 V DC outputs for sensors and are compatible with 4
mA to 20 mA current signals, signals from current-based
smoke sensors and water sensors, dry contact signals, and NTC
signals.
Pin definition:

3: 12 V DC, 54 mA
 6: D-

7: D+
 8: GND
Table 3-14 describes the mapping between the AI/DI module
SW2
ON
OFF
3 Configurations and Port
SW3
ON
ON
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