Other Functions; Dry Node; Rs485/Can Communication Port; Usb Communication Port - Srne SR-HF2420S40-75 User Manual

5. Other functions

5.1 Dry node

Working principle: This dry node can control the ON/OFF of the diesel generator to
charge the battery. ① Normally, the terminals are that the NC-N point is closed and
the NO-N point is open; ② When the battery voltage reaches the low voltage
disconnection point, the relay coil is energized, and the terminals turn to that the
NO-N point is closed while NC-N point is open. At this point, NO-N point can drive
resistive loads: 125VAC/1A, 230VAC/1A, 30VDC/1A.

5.2 RS485/CAN communication port

This port is an RS485/CAN communication port ; CAN communication is an optional function, which
is not available in the standard machine.
This port is an RS485 communication port which comes with two functions:
① It allows direct communication with the optional host computer (stored on the
CD-ROM) developed by our company through this port, and enables monitoring of
the equipment running status and setting of some parameters on the computer;
② It also allows direct connection with the optional RS485 to Bluetooth
communication module developed by our company through this port. After the
module is selected, you can connect the all-in-one solar charge inverter through
the mobile phone Bluetooth APP, on which you can view the operating parameters
and status of the device.
As shown in the figure:
Pin 1 is 5V power supply, Pin 2 is GND, Pin 7 is RS485-A, and Pin 8 is RS485-B ;
Pin 5 is CAN-H, and Pin 6 is CAN-L ;

5.3 USB communication port

This is a USB communication port, which can be used for USB communication with
the optional PC host software in the CD-ROM. To use this port, you should install
the corresponding "USB to serial chip CH340T driver" in the computer.
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