The 2115B is a high-performance RS232/RS485 4-port distributor designed to expand the communication capability and extend the communication distance of 485 bus in industrial applications. It supports rail-mounted and wall-mounted installation, and utilizes opto-isolation to protect devices and networks. It supports 9~24V variable voltage power supply.
The JaRa 2115B is a high‑performance RS232/RS485 4‑port module designed for industrial applications. It distributes RS485 bus signals, extends communication distance up to 1200 m, and offers optical isolation for reliable operation.
The manual covers product overview, physical description, technical specifications, connection instructions, application examples, troubleshooting tips, packaging contents, and installation dimensions. It guides users on wiring, power requirements, and how to resolve common communication issues. This manual is written in Chinese.
| Communication mode | Half‑duplex |
|---|---|
| Interface type | 10‑pin terminal blocks |
| Transmission distance | 1200 m |
| Maximum speed | 300 ~ 1153200 bps |
| Supported nodes | 128 standard load devices |
| Power supply | External 9 ~ 24 V DC |
| Power isolation | Transient 7000 V voltage isolation |
| Power consumption | <0.8 W |
| Flow control | Automatic |
| Optical isolation | 2500 V continuous voltage isolation |
| Communication delay | <2 ms |
| Operating temperature | -20 °C ~ +70 °C |
| Operating humidity | 5 % ~ 95 % |
The module operates from an external DC supply of 9 to 24 V.
The RS485 transmission distance can reach up to 1200 meters.
The module supports up to 128 standard load devices in total.
Verify that the RS232/RS485 wiring is correct, the power supply is within 9‑24 V, and for long lines add a 120 Ω resistor.