Huawei ECC500 User Manual page 33

ECC500
User Manual
Silk Screen
RUN
ALM
Table 3-11
Table 3-11 Description of ports on the front panel of the Independent Deployment AI/DI Unit
Silk Screen
COM_IN
COM_OUT
AI/DI_1 to
AI/DI_8
Issue 04 (2019-12-20)
Color
Green
Red
describes ports on the front panel of the Independent Deployment AI/DI Unit.
Port Description
Cascading ports. COM_IN connects to the RS485 expansion card, and
COM_OUT connects another Independent Deployment AI/DI Unit.
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
Copyright © Huawei Technologies Co., Ltd.
Meaning Status
Off
Run indicator Blinking (1
second on and 1
second off)
Blinking (0.125
second on and
0.125 second
off)
Alarm indicator Off
Steady on
3 Configurations and Port
Description
supply is
normal.
The AI/DI
expansion card
is faulty or has
no DC input.
The Independent
Deployment
AI/DI Unit is
communicating
with the main
control module
properly.
The Independent
Deployment
AI/DI Unit fails
to communicate
with the main
control module.
No alarm is
generated.
A board alarm is
generated.
26