Shelly Pro Modbus Add-on RS485
The Shelly Pro Modbus Add-on RS485 adds wired RS485 communication to compatible Shelly Pro devices for integration with professional building and energy management systems.
Connecting directly to the Shelly Pro expansion port, the add-on enables integration with BMS, EMS, SCADA and other Modbus-based automation systems. RS485 provides reliable, noise-resistant communication suited to commercial buildings, energy monitoring, renewable energy and larger automation installations.
The add-on can operate as both a Modbus client and Modbus server, allowing compatible Shelly Pro devices to read data from external meters and controllers or provide their own measurements and states to other systems.
This is an expansion add-on and not a standalone device. It requires a compatible Shelly PRO device to operate:
Shelly PRO EM-50
Shelly PRO 3EM 120 A
Shelly PRO 3EM-400
Shelly PRO 1
Shelly PRO 2
Key features:
- Adds RS485 communication to compatible Shelly Pro devices
- Modbus client and server operation
- Integrates with BMS, EMS and SCADA systems
- Connects directly to the Shelly Pro expansion port
- Suitable for long-distance wired communication
- Designed for professional automation and energy monitoring
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Physical |
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Size (HxWxD): |
94x19x69 mm / 3.70x0.75x2.71 inch |
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Weight: |
48 g / 1.70 oz |
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Screw terminals max torque: |
0.4 Nm / 3.5 lbin |
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Conductor cross section: |
0.3 to 2.0 mm² / 22 to 14 AWG |
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Conductor stripped length: |
6 to 8 mm / 0.24 to 0.31 in |
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Mounting: |
DIN rail Via the Shelly proprietary serial interface to connect to a Shelly compatible device |
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Shell material: |
Plastic |
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Shell color: |
Black |
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Connectors color: |
Black and Green |
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Environmental |
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Ambient working temperature: |
-20 to 40 °C / -5 to 105 °F |
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Humidity: |
30% - 70% RH |
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Max. altitude: |
2000 m / 6562 ft |
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Electrical |
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Power supply: |
3,3 V⎓, 12 V⎓ |
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Power consumption: |
< 1 W |
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Compatible Devices |
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Models |
Shelly Pro EM 50 Shelly Pro 3EM (120) Shelly Pro 3EM 400 Shelly Pro 1 Shelly Pro 2 |
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Other Parameters |
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Mode: |
Half-duplex mode |
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Number of nodes: |
Up to 32 nodes |
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Max speed: |
10 Mbps |
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Range: |
Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors |
Important: All electrical installation work must be performed by a qualified and licensed electrician. Failure to comply may void product warranties and breach electrical safety laws.