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