Com. Communication Connection - KEHUA TECH SPI-B X2 Series User Manual

3 Installation
WiseSolar Plus APP can communicate with inverter through WIFI /4G (optional) stick to realize the
local and remote maintenance. User can perform the information query, alarm query, event query,
parameter setting, etc. of inverter through WiseSolar Plus APP.
Download and install WiseSolar Plus APP:

Method 1: search WiseSolar Plus and download the WiseSolar Plus APP through the following
application market, and install the WiseSolar Plus APP.
1. Application market (Android Chinese user), Google Play (Android overseas user) .
2. APP store (iOS) .

Method 2: scan the QR code below to download and install the WiseSolar Plus APP according to
prompting.
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3.5.6 COM. Communication Connection

COM. communication interface can be set to DRM or RS485 communication interface, the pin
definition of the COM. communication interface is as shown in Figure3-30.
Figure3-30 Pin definition of the COM. communication interface
DRM communication interface
DRM communication interface is used to connect with the DRM controlling device.
When the COM. communication interface set to DRM communication interface, the pin13 and pin14
of the COM. communication interface cannot connect wires. The pin13 and pin14 of the external
DRM adapter must be short connected.
PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
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User Manual