Industrial Grade RS485 Repeater
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Industrial Grade RS485 Repeater
The Industrial Grade RS485 Repeater is a high-performance, photoelectric isolation communication module designed to extend RS485 signal transmission over long distances. Compliant with the EIA/TIA RS485 standard, it supports asynchronous half-duplex, two-way communication and fully transparent data transmission. It is ideal for demanding industrial environments where signal stability, safety, and reliability are essential.
Key Features
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Extended Communication Range: Amplifies RS485 signals up to 1200 meters at 9600bps.
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High Capacity: Supports up to 128 RS485 devices, with a single repeater supporting up to 32 nodes (≤10m between nodes).
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Photoelectric Isolation: 1500V isolation voltage protects devices from ground loop and common-mode interference.
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Built-in Protection: Includes TVS surge protection, self-recovery fuse, reverse power protection, and industrial-grade anti-interference circuitry.
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Auto Data Direction Sensing: No delay in signal transmission or reception.
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LED Indicators: RXD/TXD and power status indicators for real-time communication monitoring.
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DIN Rail Mounting: Standard 35mm rail mount for easy integration into industrial control panels.
Connection Modes
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Single Repeater Mode
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Point-to-Point: Connect one 485 output device and extend the distance to 1200m.
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Point-to-Multipoint: Connect up to 32 devices with ≤10m spacing; total bus length remains 1200m.
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Parallel Repeater Mode
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Connect up to 16 repeaters to a single RS485 input to expand the number of connected devices (up to 128).
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Cascade (Tree Topology) Mode
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Extend communication distances indefinitely through cascaded repeaters while maintaining support for 128 devices.
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Applications
Ideal for industrial communication systems requiring long-distance, interference-resistant data transmission:
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Industrial automation
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PLC systems
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Security monitoring
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Power grid data acquisition
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Building intercom systems
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Access control and parking systems
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Highway toll collection
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MODBUS networks
Specifications
| Parameter | Description |
| Interface Standard | RS485 (EIA/TIA compliant) |
| Baud Rate | 0–115200bps (auto-adaptive) |
| Protocol | Transparent (not protocol-restricted) |
| Max Transmission Distance | 1200m per repeater (@ 9600bps) |
| Node Support | Up to 128 devices total / 32 per repeater |
| Working Voltage | DC 9V–24V (reverse protection included) |
| Power Consumption | 0.6W (static) |
| Isolation Voltage | 1500V (photoelectric) |
| Working Temperature | -20°C ~ +70°C |
| Storage Temperature | -40°C ~ +85°C |
| Humidity | 5% ~ 95% (non-condensing) |
| Transmission Medium | Twisted pair / shielded cable |
| Mounting Method | 35mm DIN rail |
| Dimensions (L×W×H) | 109 × 60 × 33mm (4.29 × 2.36 × 1.30 inches) |
Port Description
| Port | Label | Description |
| Input | A+ / B- | RS485 input (positive/negative) |
| GND | RS485 input ground | |
| Indicators | RXD | Data receive indicator |
| TXD | Data transmit indicator | |
| PWR | Power status indicator | |
| Output | A+ / B- | RS485 output (positive/negative) |
| GND | RS485 output ground | |
| Power | 24V+ / GND | DC 24V power input |
| DC Socket | DC-005 | 12V/1A (5.5/2.1mm power adapter) |
Package Includes
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1 × Industrial Grade RS485 Repeater
Effective Date: March 27, 2025
At OpenELAB, we are committed to providing accurate product descriptions and delivering high-quality products. If you experience any issues with your purchase, please notify us within 60 days of the shipment date.
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Unless explicitly stated in a specific agreement or purchase order, OpenELAB makes no warranties—express or implied—regarding the fitness, suitability, or merchantability of any product for a particular purpose or special use.
2. Warranty Policy
Warranty Period
The standard warranty period for products sold by OpenELAB is 12 months from the date of delivery.
Under this warranty, OpenELAB will make a reasonable effort to repair or replace products free of charge if defects are due to issues with raw materials, design, or manufacturing.
If the defect qualifies under this policy but falls outside the covered scope, reasonable charges may apply for repair or replacement.
After the warranty period, support may still be available at a reasonable fee.
Warranty Exclusions
The warranty does not apply in the following cases:
- The product is beyond the 12-month warranty period.
- Damage due to misuse, improper maintenance or storage, or failure to follow the user guide or manual.
- Issues caused by Force Majeure events (e.g., natural disasters, war, legal changes, etc.).
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