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11.6. Serial RS232 / RS485 interface (
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Ex factory the unit is set to RS232 communication. This setting can be changed to RS485
(2-wire) by means of an internal DIL switch. To access the DIL switch, you must remove the
screw terminal connectors and the backplane. Then pull the board to the rear to remove the
PCB from the housing.
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Removal of the back plane
Location of the DIL switch
x
Never set DIL switch positions 1 and 2 or DIL switch positions 3 and 4 to
“ON” at the same time!
x
After setting the switch, shift the print carefully back to the housing and
avoid damage of the front pins for connection to the front keypad plate.
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Connection of the RS232 interface
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Connection of the RS485 interface
