K&R GT600-4T132G User Manual page 262

8. Peripherals and Options
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Extension RS485 Card (GT60TX1)
GT60TX1 is specially designed to provide the drive with RS485 communication function.
It adopts isolation scheme and electrical parameters conform to international standard. It
helps to implement control of drive running and parameter setting through remote serial
interface.
Table 8-13 Terminal descriptions of GT60TX1
Type Terminal Terminal Name
RS485 485+
communication
terminal
485-
CGND
Table 8-14 Jumper descriptions of GT60TX1
Jumper Description
J3 RS485 terminal resistor
matching selection
Setting of jumpers takes top view with main terminals at the bottom of the
Note
card as visual angle. Jumpers are silk-screened on the card.
●
RS485 bus topology
The RS485 bus topology is shown as follows:
485+
485-
120Ω
terminal
resistor
485+ 485- CGND
Master
J3
J2
485+ 485- CGND
Function Description
RS485 positive input RS485 communication terminal with
isolation input
RS485 negative input RS485 communication terminal with
isolation input
RS485 Power ground Isolated power
Meaning
Matching the terminal resistor
Not matching the terminal resistor
RS485 bus
CGND
485+ 485- CGND
J3
MD38TX1
GT600
slave 1
Setting
120Ω
terminal
resistor
485+ 485- CGND
Set J3 to
match terminal
J3
resistor
MD38TX1
GT600
slave N