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MODULAR SUNWAY TG
TE OD
INSTALLATION GUIDE
80/
139
Rev. 03
– 01/06//2018
Figure 48: SW1 termination DIP-switch
RS-485 GALVANIC ISOLATION BOARD SIGNALLING LEDS
NOTE
The standby bus voltage values for COM0 and COM1, connected to the RS485 galvanic isolation
board drivers are:
2.8 V between line A (D1) and 0 V
2.2 V between line B (D0) and 0 V
The RS485 galvanic isolation board is equipped with five LEDs:
•
Three LEDs indicate the presence of the various board power supply voltages.
LED
Colour
Function
L1
Green
Supply voltage detected for inverter side RS-485 circuits (5 V)
L2
Green
Supply voltage detected for inverter (9 V)
L3
Green
Supply voltage detected for Master side RS-485 circuits (5 V)
Table 23: Voltage indicator LEDs
•
Two LEDs for indicating fault conditions concerning the RS485 signals to the inverter and the Master.
LED
Colour
Function
L5
Red
Inverter side RS-485 signal faults
L6
Red
Master side RS-485 signal faults
Table 24: FAULT indicator LEDs
A FAULT indication is only to be considered valid when the line is correctly terminated, i.e. the SW2 DIP-
switch is set to ON.
Fault conditions may be due to one of the following:
•
Differential voltage between A (D1) and B (D0) below 450 mV.
•
A (D1) or B (D0) exceed the common mode voltage range [
–7 V; 12 V].
•
A (D1) or B (D0) connected to a fixed voltage (this condition can only be detected when
communication has been established).