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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
●
PT ports: can connect to two PT100/PT1000 temperature sensors.
Appearance
PT Port
Description
PT1
+
Can connect to a three-wire or
two-wire PT100/PT1000
temperature sensor.
● Three-wire: cable length <
2 m for PT100; cable length
< 20 m for PT1000
● Two-wire: cable length < 2
m for a PT temperature
sensor
–
GND
PT2
+
–
GND
●
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.
Appearance
COM Port
Description
COM1,
COM2, and
COM3
+
RS485A, RS485 differential
–
RS485B, RS485 differential
signal–
Power Ports
●
Input power ports: There are two input power ports.
SmartLogger3000
User Manual
2 Product Overview
Issue 10 (2022-08-20)
Copyright © Huawei Technologies Co., Ltd.
26