Huawei SUN2000L User Manual page 60

SUN2000L-(2KTL-5KTL)
User Manual
Figure 5-21 ALARM Ports
The ALARM port provides an alarm signal port to connect to an alarm beacon, which reminds
the user to handle the Low Insulation Resistance, Abnormal Residual Current, or Faulty
Residual Current Sensor alarm. The ALARM port reserves an RS485/12 V signal port.

The alarm beacon should be installed within 2 meters away from the SUN2000L.

The shield layer of the device signal cable connected to the ALARM port and the COM
port is also advised to be grounded.

The Faulty Residual Current Sensor alarm is the Abnormal Device alarm with a cause
ID of 5.
Table 5-4 ALARM port definitions
No.
1
2
3
4
5
6
7
8
Issue 06 (2020-03-19)
Label Definition
ALARM– Alarm signal–
ALARM+ Alarm signal+
RS485B, RS485 differential
485B3
signal–
485A3 RS485A, RS485 differential
signal+
12 V– Negative of the 12 V power supply
12 V+ Positive of the 12 V power supply
N/A N/A
PE Shielding ground
Copyright © Huawei Technologies Co., Ltd.
5 Electrical Connections
Description
Reserved, can connect to the
power port on an alarm
beacon
Reserved RS485/12 V
signal port, output power of
the 12 V power supply ≤ 3
W
N/A
Connects to the shield layer
of the cable.
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