====== Communication connection ======
===== Bottom view=====
{{:manual:pws2-30k:微信图片_20220321142840.png?600|}}
^No.	^Description^
|1	|DC waterproof tube +	|
|2	|DC waterproof tube -	|
|3	|Ethernet waterproof terminal	|
|4	|RS-485 waterproof terminal	|
|5	|R-EPO waterproof terminal|
|6	|AC waterproof tube|
|7	|AC disconnect|
|8	|Fan box|

PWS2-30K-NA has two different communication interfaces: Ethernet and RS-485, meanwhile, there is a remote emergency power off terminal.

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At the same time, the PWS2-30K-NA can only be configured to communicate with the EMS via Ethernet, or RS-485, refer to HMI operation for more information
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 ===== Ethernet cable connection =====

PWS2-30K-NA can be directly controlled through Ethernet for remote control. Through networking, users can remote dispatch energy, monitor operation status, and set parameters with MODBUS TCP/IP protocol.

{{:manual:pws2-30k:image139_ethernet_cable.png|}}
 
The pinout of a standard T-568B straight-through ethernet cable:
^Pin^Color^
|1|white/orange|
|2|Orange|
|3|white/green|
|4|blue|
|5|white/blue|
|6|green|
|7|white/brown|
|8|brown|

  - Penetrate network cable whose insulating layer is stripped into the waterproof cap and insert it into RJ45 connector after being arranged in order;
  - Use wire crimpers to compress the connector; 
  - Screw out the cap on the waterproof Ethernet terminal at the bottom of the inverter; 
  - Insert the ready-made cable into Ethernet terminal. 

====== RS-485 cable connection ======

PWS2-30K-NA can be connected to EMS through RS-485 to obtain battery information and energy dispatching command and complete automatic charging and discharging control and protection of energy storage system. RS-485 is connected through RJ45 connector. The definition of the pin of RJ45 connector is shown in the following image. The connection steps are the same as Ethernet cable. 

{{:manual:pws2-30k:image140_rs485_cable.png|}} 

====== Remote EPO connection ======

A remote EPO switch can be connected to the R-EPO RJ45 port. 
 
{{:manual:pws2-30k:image142_emergency_power_off.png|}}

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THE R-EPO IS A NORMAL CLOSED CONTACT. IT SHOULD BE CONNCTED TO A NC SWITCH OR BUTTON.
IF NO REMOTE EPO IS NEEDED, PLEASE DISABLE THE EPO FUNCTION IN HMI.
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