Key facts
- Manuals
- 1
- Languages
- ZH
- Last added
- 2011-12-16
Featured ASCO manuals

ASCO S300A/B Communication Module User Manual
The S300A/B communication module adds Modbus RTU remote monitoring to ASCO automatic transfer switches (ATS) in the 300, 200, 4000 and 7000 series. It supports up to 32 devices on a two‑wire half‑duplex RS‑485 bus and can be mounted on a standard 33 mm DIN rail.
The manual covers module features, wiring and installation steps, address and baud‑rate configuration via DIP switches, the Modbus register map for both S300A and S300B variants, and a troubleshooting guide with common LED indicators and fault‑alarm handling. This manual is written in Chinese.
Covers: Features · Installation · Wiring and Connections · Configuration and Address Setting · Modbus Register Map · Troubleshooting
Latest ASCO manuals
ASCO S300A/B Communication Module User Manual
User Manual 8 pages · 654 KB · ZHThe ASCO S300A/B Communication Module User Manual provides installation, configuration, and troubleshooting instructions for integrating the module with…
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in ASCO manuals
How do I set the baud rate for the S300A/B module?
Use DIP‑1: set it up for 19.2 kbaud or down for 9.6 kbaud.
How can I change the system voltage setting?
Adjust DIP‑3: up for 380 V, down for 220 V, then power‑cycle the module.
