The PK485GZ RS-485 optical isolation relay is a product with features such as RS-485 interface, adaptive rate, and 2500V isolation voltage.
The PK485GZ is an RS-485 optical isolation repeater designed to extend network length and improve noise immunity. It supports both two‑wire and three‑wire half‑duplex communication and isolates the power and signal lines up to 2300 V.
Key features include a wide operating temperature range, DIN‑rail mounting (122 mm × 70 mm × 43 mm), reverse‑polarity and ESD protection, and the ability to connect up to 256 devices over a 1200 m cable run. The manual details performance parameters, mechanical layout, pin definitions, and recommended application scenarios. This manual is written in Chinese.
| Communication Interface | RS-485 (two‑wire or three‑wire, half‑duplex) |
|---|---|
| Data Rate | 0–38.4 kbps adaptive |
| Isolation Voltage | 2300 V |
| Power Supply | +8 V to +30 V DC |
| Typical Current Consumption | 30 mA |
| ESD Protection | 15 kV |
| Lightning Protection | 600 W |
| Operating Temperature | -20 °C to 70 °C |
| Storage Temperature | -40 °C to 85 °C |
| Mounting Size | 122 mm × 70 mm × 43 mm (DIN rail) |
The repeater provides an isolation voltage of 2300 V.
It operates from a DC supply of +8 V to +30 V.
Up to 256 modules can be linked through the repeater.
The repeater can extend the RS‑485 network up to 1200 m.