Appearance AI Port Description
AI1 1 Supports one channel of
voltage-type (0–10 V) AI
signals.
GND
AI2 2 Support three channels of
current-type (0–20 mA or 4–
20 mA) AI signals.
GND
AI3 3
GND
AI4 4
GND
● DO ports: digital output ports, supporting two relay outputs. A DO port
supports a maximum of 12 V signal voltage.
Appearance DO Port Description
DO1 NC ● The NC/COM is a normally
closed contact.
● The NO/COM is a normally
open contact.
COM
NO
DO2 NC
COM
NO
● USB port: supports USB2.0 for connecting to a USB ash drive.
Appearance
USB Port Description
USB After a USB ash drive is
inserted into the USB port,
you can perform local
maintenance operations on
the SmartLogger, such as
rmware upgrade and data
export.
● COM ports: RS485 communications port, supporting three independent RS485
channels and the access of devices that comply with the Modbus-RTU, IEC103,
or DL/T645 protocol.
SmartLogger3000
User Manual 2 Product Overview
Issue 10 (2022-08-20) Copyright © Huawei Technologies Co., Ltd. 18