The following table describes the pin assignments for the COM_IN and COM_OUT
ports.
Table 4-28 Pin assignment for the COM_IN and COM_OUT ports
Item Description
Pin
sequence
Pin1 RS485+
Pin2 RS485-
Pin3 12 V (input power, supplying power to the module)
Pin4 RS485+
Pin5 RS485-
Pin6 -
Pin7 -
Pin8 GND
Indicators and Buttons
Table 4-29 UIM20A indicators
Indicator
Status Description
RUN Steady
on
A board application is being loaded.
O The board is not running.
Blinking
at long
intervals
The ECC800-Pro is successfully registered, and the
software runs properly (blinking at long intervals (0.5
Hz), on for 1s and then o for 1s).
Blinking
at short
intervals
The communication is interrupted or the ECC800-Pro is
unsuccessfully registered (blinking at 2.5 Hz, on for 0.2s
and then o for 0.2s).
Blinking Blinking at super short intervals for 0.5s and then o for
0.5s; last 10s (blinking at super short intervals: 10 Hz,
on for 0.05s and then o for 0.05s)
ALM Steady
on
A system fault alarm is raised.
O The system is normal.
iMaster NetEco
Device Installation and Commissioning Guide (Data
Center) 4 Connecting Monitoring Cables to Devices
Issue 02 (2021-05-12) Copyright © Huawei Technologies Co., Ltd. 105
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