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Specification of high-performance vector convertor
Appendix E: Instructions of RS-485 communication expansion card
(Apply to all series)
I. Introduction
It's specially developed for 485 communication function of this series frequency convertor. By
adopting isolation scheme, electric parameters conform to international standard and users can select
based on demands so as to control operation of frequency convertor and set parameters through remote
serial port;
II. Mechanical installation and functional descriptions of control terminals
1. Installation way and appendix B: the same with IO expansion card (VFD-IO1). Functional
descriptions of wiring terminals and dial-up definitions respectively refer to Table 1 and
Table 2 in Appendix E:
Functional description of control terminal:
Category
Terminal symbol Terminal name
485+/485-
485 communication
(CN1)
CGND
Jumper description:
Jumper No.
J1
Note:
To prevent communication signal from external interference, communication wire can use twisted pair and
avoid using parallel lines as far as possible;
(VFD-TX1)
Appendix E: Table 1 Functional
description of control terminal
Communication interface
terminal
Power ground of 485
communication
Appendix E: Table 2
Jumper description
Select matched resistance for 485 terminal
Functional description
485 communication input terminal,
isolation input
Isolated power
Description
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