JUMPER FOR RS232/RS485 SELECTION. Enertronica Santerno Sinus Penta, SOLARDRIVE PLUS, IRIS BLUE, PENTA MARINE

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10.5. Jumper for RS232/RS485 Selection

Jumper J1 sets ES822 board to operate as RS485 interface or as RS232 interface. The corresponding positions are silk-screened on the board.

With a jumper between pins 1-2, CN3-(RS485) is enabled (default).

With a jumper between pins 2-3, CN2-(RS232) is enabled.

Figure 84: Jumper setting RS232/RS485

10.6. DIP-switch for RS485 Terminator

Please refer to the Serial Communications section in the Installation Guide.

For serial link RS485 in ES822 board, the line terminator is selected through DIP-switch SW1 as shown in the figure below.

When the line master (computer) is located at the beginning or at the end of the serial link, the line terminator of the farthest inverter from the master computer (or the only inverter in case of direct connection to the master computer) shall be enabled.

Line terminator enables by setting selector switches 1 and 2 to ON in DIP-switch SW1. The line terminator of the other inverters in intermediate positions shall be disabled: DIP-switch SW1, selector switches 1 and 2 in position OFF (default setting).

In order to use RS232-DTE link, no adjustment of DIP-switch SW1 is required.

Figure 85: Configuration of terminator DIP-switch for line RS485

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