Parallel Communication Connection - Growatt WIT 50K-A User Manual

COM1
Fig 6.11 COM1 communication connection
3. The external communication terminals of the WIT 50-100K Inverters are described in
Table 6.5. Short Pin 5 and pin 10 when the host computer is used.
Table 6.5 External communication terminal description
Definition of battery communication interface
Number Definition of signal
1 PCS_RS485A_4
2 PCS_RS485B_4
3 RS485A1
4 RS485B1
5 Res_RS4851A
6 RS485A2
7 RS485B2
8 RS485A2
9 RS485B2
10 Res_RS4851B
11 PE
12 REPO1
13 REPO2
14 DO1
15 DO2
16 PE
37
RS485A4
RS485B4
RS485A1(IN)
RS485B1(IN)
Res-RS4851A
RS485A2(IN)
RS485B2(IN) RS485A2(OUT)
RS485B2(OUT)
PE
Res-RS4851B
PE
D02
D01
REPO2(DI)
REPO1(DI)
Note
RS485_4
RS485 terminal for external communication
RS485 matching resistor
RS485 input port for the meter
RS485 output port for the meter
RS485 matching resistor
Grounding
The WIT Inverter shutdown input dry contact
signal
Generator start-up output dry contact signal
Grounding

6.5.3 Parallel Communication Connection

The parallel communication terminal (COM2) of the WIT Inverter uses a 30-pin terminal.
The corresponding terminal is included in the accessary kit. Follow these steps to
establish the connection:
1. Connect the communication cables to the corresponding terminals as required. For
details, see Table 6.6 and Table 6.7;
2. Remove the dustproof cover from the COM2 terminal and insert the 30-pin terminal
(the client side) to the corresponding position.
Fig 6.12 Parallel communication terminal
COM2
Parallel communication wiring diagram (dual PCS)
COM2
RS485-1 PE
RS485-1
CAN2-L
CAN1、CAN2、
CAN2-H
RS485-1
GND.S
CAN1-L
CAN1-H
PE
GND.S
+24V
RS485-5
RS485-5
RS485-5
RS485-4
RS485-4
RS485-4
PCS1
EU SYN 450/680U-31
Parallel communication wiring diagram (three PCS)
Fig 6.13 COM2 communication connection
COM2
COM2
CAN1、CAN2、
RS485-1
PE
PE
PE
RS485-5
RS485-4
ATS-CAN
COM2 COM2
、
CAN1、CAN2、
、
RS485-1
PE
RS485-5
RS485-4
PCS3
PCS2
PE
PE
38