Key facts
- Manuals
- 5
- Languages
- ZH
- Last added
- 2026-10-01
Featured Four Star Electronics manuals
Four Star Electronics U-485G USB-RS485/422 User Manual
The U-485G converts a PC's USB serial port to isolated RS485 or RS422 signals. It is powered directly from the USB port (current <50 mA) and features a DC/DC isolated power module and high‑speed optocoupler for signal isolation. The device supports plug‑and‑play operation on Windows systems and includes status LEDs for power and data transmission.
The manual covers technical specifications, driver installation, wiring diagrams for both RS485 half‑duplex and RS422 full‑duplex networks, terminal resistor settings, and recommended cabling. Installation can be done on a 35 mm DIN rail or with bolt‑hole mounting, and the unit operates from –20 °C to 70 °C. This manual is written in Chinese.
Covers: Technical Specifications · Driver Installation · RS485 Half‑Duplex Network · RS422 Full‑Duplex Network · Terminal Resistor Settings · Cable and Wiring Recommendations
Four Star Electronics FS-OLM-M PROFIBUS Fiber Optic Link Module User Manual
The FS-OLM-M is an industrial‑grade PROFIBUS‑DP to fiber‑optic link converter produced by Four Star Electronics. It converts RS485 signals to optical signals for long‑distance, high‑speed communication in PROFIBUS, MPI and PPI networks.
The manual provides an overview of the module, its main applications, technical specifications, external connector layout, internal block diagram, wiring options, and a FAQ section that addresses common installation and troubleshooting questions. This manual is written in Chinese.
Covers: Foreword · Overview · Main Uses and Features · Product Features and Technical Parameters · External Structure and Pin Definition · Internal Block Diagram
Four Star Electronics iCAN-MA CAN Bus Isolator User Manual
The iCAN-MA is a CAN bus isolator produced by Four Star Electronics. It provides high‑voltage isolation between CAN ports and power ports, supports adaptive data rates up to 1 Mbps, and is designed for use in hazardous mining environments.
The manual describes the device’s technical parameters, wiring diagrams, installation methods, isolation voltage testing procedures, and ordering information, helping users configure and maintain the isolator safely. This manual is written in Chinese.
Covers: Overview · Product Features and Technical Parameters · Schematic Diagram · Physical Appearance and Component Description · Installation and Use Guide · Isolation Voltage Test
Four Star FS-LR485A Industrial RS485/RS422/RS232 to LoRa Adapter User Manual
The FS-LR485A is an industrial‑grade serial‑to‑LoRa wireless adapter that converts RS485, RS422 or RS232 signals to LoRa transmission. It supports up to 65,535 nodes, operates in the 433 MHz band and works in temperatures from –40 °C to +85 °C.
The manual provides detailed hardware specifications, wiring diagrams, parameter configuration via USB, installation guidelines, and troubleshooting FAQs to help users integrate the adapter into automation, IoT or security systems. This manual is written in Chinese.
Covers: Overview · Features and Technical Parameters · Product Structure and Components · Antenna and Indicator LEDs · Wiring Terminals · Parameter Setting via USB
Latest Four Star Electronics manuals
Four Star Electronics U-485G USB-RS485/422 User Manual
User Manual 5 pages · 236 KB · ZHThe U-485G USB‑RS485/422 opto‑isolated converter manual provides installation, driver setup, wiring and operation instructions.
Four Star Electronics FS-OLM-M PROFIBUS Fiber Optic Link Module User Manual
User Manual 13 pages · 1.1 MB · ZHUser manual for the FS-OLM-M PROFIBUS fiber optic link module, covering features, specifications, installation and troubleshooting.
Four Star Electronics iCAN-MA CAN Bus Isolator User Manual
User Manual 11 pages · 829 KB · ZHUser manual for the Four Star iCAN-MA CAN bus isolator, covering features, specifications, installation and testing.
Four Star FS-LR485A Industrial RS485/RS422/RS232 to LoRa Adapter User Manual
User Manual 20 pages · 1 MB · ZHUser manual for the Four Star FS-LR485A industrial serial‑to‑LoRa adapter, covering setup, parameters and installation.
Four Star Electronics FS-ETH-SC09 User Manual
User Manual 31 pages · 1.3 MB · ZHThe FS-ETH-SC09 User Manual provides setup, configuration, and operation instructions for Four Star Electronics' Ethernet adapter for Mitsubishi FX series PLCs.
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 Four Star Electronics manuals
How do I install the driver for the U-485G?
Insert the converter into a USB port, Windows will detect new hardware, then run the driver installer from the supplied CD and follow the prompts.
From: Four Star Electronics U-485G USB-RS485/422 User Manual
What is the maximum communication distance of the U-485G?
Up to 3000 m at 4800 bps and up to 2000 m at 9600 bps.
From: Four Star Electronics U-485G USB-RS485/422 User Manual
What is the difference between the FS-OLM-M and FS-OLM-S modules?
FS-OLM-M uses multimode fiber with a maximum transmission distance of 4 km, while FS-OLM‑S uses single‑mode fiber and can reach up to 12 km; all other functions are identical.
From: Four Star Electronics FS-OLM-M PROFIBUS Fiber Optic Link Module User Manual
What happens to the network when a fiber link is broken or the remote module loses power?
The local module stops receiving optical signals, a fault signal occupies the DP bus for about 350 ms and the corresponding fiber‑break indicator (CH1‑OFF or CH2‑OFF) lights up; the bus then resumes normal communication.
From: Four Star Electronics FS-OLM-M PROFIBUS Fiber Optic Link Module User Manual
What is the isolation voltage rating between the two CAN ports?
The isolation voltage between CAN1 and CAN2 ports is rated at 5000 V AC.
From: Four Star Electronics iCAN-MA CAN Bus Isolator User Manual
What communication speeds does the iCAN-MA support?
It supports adaptive communication speeds from 0 up to 1 Mbps.
From: Four Star Electronics iCAN-MA CAN Bus Isolator User Manual