AVer System Contrll Pro User Manual (NV version) - Manual (Page 14)

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1.2.2 Connecting with the DVR Server through the RS485 port
Through the RS485 port, user can connect multiple DVR servers with the System Controller.
Before starting to make a connection, please prepare the following items:
RS232 cable RS485 to RS232 Converter
(*User can purchase from the dealer
** The RS232 to RS485 Converter needs
to support RS-485 automatic data
direction control protocol )
Single core wire
1. Cut the 4 single core wires.
2. Using the screwdriver to press down the orange tenon and insert the single core wire into the
pin hole of the I/O terminal on the System Controller. When the wire is inserted in the end of
the pin hole, release the orange tenon to fix the wire.