{"searchBar":{"inputPlaceholder":"Search by keyword or ask a question","searchBtn":"Search","error":"Please enter a keyword to search"}}
{}

Our Brands

{"support":{"yesButton":"yes","noButton":"no","feedback":{"title":"What can we do to improve?"},"submitButton":"Submit","successMessage":"Thank you for your feedback","title":"Was this helpful?","feedbackPercentLabel":"of people found this helpful","captcha":{"error":"Please tick the box"}}}
Search FAQs

BMS AP9921X-AP9922; RS485 (Modbus Wiring Pinout)

 
 
Issue:
AP9921X-AP9922 Battery Management System RS485 (Modbus Wiring Pinout)
 
 
Product line:
AP9921X-AP9922, Battery Monitoring System (BMS)
 
 
Environment:
AP9921X-AP9922 Wiring for Modbus
 
 
Cause:
The manual shows the DB9 connection for the RS485/Modbus says Pin2:D0, Pin:D1

 
Resolution:
Pin2:D0 (Positive), Pin3:D1 (Negative)
 
 

Can't find what you are looking for?

Reach out to our Customer Care team to receive information on technical support, assistance for complaints and more.