Technical Description
20
Communication Interfaces
REFUsol 20K...33K-2T
982079 | 05 | 2021-03
Fig. 15:Communication interfaces
1
Ethernet/WiFi interface
2
RS485 interface(s)
3
microSD card slot
1
2
Communication port
WIFI/GPRS
ON
OFF
IN1
IN2
PE
N
IN1 IN2 IN3 IN4 GND DRM
0
NC COM NO
AC
~
RS485
SD
RELAY
RS485
L1
L2
L3
WIFI/GPRS
IN1 IN2 IN3 IN4 GND DRM
0
NC COM NO
RS485
SD
RELAY
RS485
3
Tab. 2:
Communication ports, digital inputs
Terminal connection
Designation
IN1
IN2
IN3
IN4
GND
DRM0
Function/circuit for power
reduction
IN1
⇔
GND
P
N
= 0 %
IN2
⇔
GND
P
N
= 30 %
IN3
⇔
GND
P
N
= 60 %
IN4
⇔
GND
P
N
= 100 %
Logic-GND
–
Summary of Contents for 20K-2T
Page 71: ......
