7
An example of wiring for the communication is shown in the figure below:
Correct wiring method: Communication Cable shield is connected to earth.
It is recommended to add a matching resistor between A and B at the end of the meter. The resistance range is 120Ω~10 kΩ.
Note: 1.When the meter has Profibus function, for the related communication configuration and GSD file, please refer to the CD
delivered with the meter.
2.The second RS485 communication only supports Modbus 03 command.
5. Packaging
The package contains the following items: Host (including plug-in terminal block), mounting brackets, factory inspection report,
certificate (anti-counterfeiting label), installation instructions.
When opening the product packaging, please check carefully whether there is any damage. If any damage occurs, please inform
ACREL company or agent promptly, and keep the damaged external packaging. The company will promptly replace it.
6. Engineering Construction Notes
The input voltage should not exceed 120% of the rated input voltage of the product (100V or 110V or 400V or 690V). Otherwise,
the PT should be used; a 1A fuse must be installed on the voltage input; the wiring method of the product must be set according to the
PT wiring of the product. The wiring method is as follows:
6.2 Current input
The standard rated input current is 1A or 5A. It requires the use of an external CT (recommended to use a wiring strip, not directly
connected to the CT, in order to facilitate disassembly); ensure that the input current corresponds to the voltage, the phase sequence is
consistent and the direction is consistent; if There are other meters connected in the CT circuit used, the wiring should be connected in
series.
Before removing the current input connection of the product, be sure to disconnect the CT primary circuit or short the secondary
circuit!
6.3 Communication Wiring
The meter provides asynchronous half-duplex RS485 communication interface, using MODBUS-RTU
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