KYLAND KGW3204, Руководство пользователя, Страница: 9 / 44

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2.1 Connecting Power
The KGW3204 Modbus gateway can be powered by connecting the power source to the terminal block, and
the instruction is as follows.
1. Loosen or remove the screws on the terminal block.
2. Connect the 12~48 VDC power cable to the terminal block.
3. Tighten the connections using the screws on the terminal block.
Note: KGW3204 Modbus gateway does not have the On/Off switch. It automatically runs when it is powered
on. The PWR LED on the top panel will glow to indicate that the device is powered on. The device supports
two redundant DC power supply.
2.2 Connecting Serial Devices
The serial ports are on the front panel. If you connect the RS-422/RS-485 network with multiple devices,
please note the following:
1. All devices that are connected to a single serial port must use the same protocol (i.e., either Modbus RTU
or Modbus ASCII).
2. Each master device must get its own port on the device.
Please refer to the 2.5 section for the guide of serial port
：
Pin Assignments.
2.2.1 Setting RS-485 Terminal Resistors
When build up the RS-485 network in bad conditions, you may need to add terminal resistors to prevent the
reflection of serial signals. There is a default built-in 120K
Ω
terminal resistor in KGW3204. For serial ports, the
DIP switch on the top panel is used to enable/disable the terminal resistor.
SetingSetting the 120
Ω termination resistor: the switch 1/2/3/4 corresponds to the serial port S1/S2/S3/S4.
When switch 1/2/3/4 is set to
“ON”, it enables the terminal resister, and when switch 1/2/3/4 is set to “OFF”, it
disables the terminal resistor. The gateway device disable terminal resistors by default.
2.2.2 Connecting to a Host or the Network
The two 10/100M ethernetEthernet ports on the front panel are used to connect a host or Ethernet network.
The gateway can be connected to other hosts or networks by using this ethernetEthernet ports. In normal
operation, you can use the standard ethernetEthernet cable to connect the device to Modbus TCP network.
For initial configuration or troubleshooting purposes, you may connect the device directly to a PC. When the
Modbus gateway runs, the two LED light in the port will light up for checking whether it is connected to the
network.
Two ethernetEthernet ports and two corresponded MAC addresses are provided by KGW3204. The IP
addresses are editable but the MAC addresses can not be changed.