Inovance MD500

Appendix A
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127
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A.2 Layout and Function of Terminals of Extension RS485 Card (MD38TX1)
MD38TX1 is specially designed to provide the drive with RS485 communication function. It adopts isolation
scheme and electrical parameters conforming to international standards. It helps to implement control of drive
running and parameter setting through remote serial interface.
485
+ 485- CGND
J
3
J2
Figure A-2 Layout of MD38TX1 terminals
Table A-2 Terminal descriptions of MD38TX1
Terminal Terminal Name Function Description
Terminal
Arrangement
J2
485+ RS485 positive input RS485 communication terminal with isolation input
485+ 485- CGND
485- RS485 negative input RS485 communication terminal with isolation input
CGND RS485 Power ground Isolated power
Table A-3 Jumper descriptions of MD38TX1
Terminal Terminal Name Function Description Jumper
J3
RS485 terminal
resistor matching
selection
Matching terminal resistor
Not matching terminal resistor
Note
● Setting of jumpers takes top view with main terminals at the bottom of the card as visual angle. Jumpers
are silk-screened on the card.