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DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
User manual
4.4 Connecting Communications Cables
Connecting Communications Port
DASS TECH inverter has 3 communication ports: 2 RS485 ports, 1 WiFi/GPRS port, as shown
below
Figure 4-8 WiFi/GPRS, RS485 position
1
2
P E
1. WIFI/GPRS Interface
2.
RS485 port
DRM0
R 485/USB
S
R 485
S
Zoom in communication port
N
T
S
R
Radio ripple
Publlc Grid
control receiver
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
User manual
Connecting RS485 Communications Cables
By the RS485 communication line, connecting DASS TECH inverter to communication
equipment (such as data acquisition, PC terminal).
You are recommended to use 24 AWG outdoor shielded network cables with the internal
resistance less than or equal to 1.5 ohms/10 m and external diameter of 4.5 mm to 7.5 mm
as RS485 communications cables.
A waterproof RJ45 connector has six parts: plug, screw nut, seals, housing, sealing plug and
cable screw nut , as shown as follow.
Figure 4 9 Waterproof RJ45 connector composition
-
DRM0
1
1. Plug 2. Screw nut 3. Seals 4. Housing 5. Sealing Plug 6. Cable Screw nut
When routing communications cables, ensure that communications cables are separated from power cables and
away from interference sources to prevent communication interruptions.
Procedure
Step 1 Remove the insulation layer of an appropriate length from the shielded network cable
using a wire stripper.
Step 2 Open DASS TECH inverter lower cover and insert the shielded network cable into the
cable screw nut, seals, screw nut.
Step 3 Connect the stripped network cable to corresponding pins on the plug, as shown as
follow.
Figure 4 11 RS485 Connecting Communications Cables(1)
-
TOP
FRONT
29
30
2
3
4
5
6
1
8
No.
Color
White and orange
1
2
Orange
3
White and green
4
Blue
5
White and blue
Green
6
White and brown
7
Brown
8
1
8
Function
R S485 B-, RS485 differential signal-
R S485 A -, RS485 differential signal +
R S485 A -, RS485 differential signal +
R S485 A -, RS485 differential signal +
R S485 B-, RS485 differential signal-
R S485 B-, RS485 differential signal-
NC
NC
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