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📝 Description
New product. The SMA 485i-Module is an RS485 communication module used as a wired communication interface for SMA photovoltaic inverters. The original packaging clearly shows DM-485CB-10 and the German wording “485i Modul für SB5G mit Combicon Steck.”, while the module is marked 485i-Module, Type 485i-MOD-G1.BGCB, Version B7, Serial No. 720728 and CE marking.
⚙️ Technical Specifications
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Brand: SMA Solar Technology AG
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Commercial model: DM-485CB-10
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Type: 485i-Module
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Type: 485i-MOD-G1.BGCB
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Visible hardware version: B7
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Serial No.: 720728
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Interface: RS485
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Number of RS485 connections: 2
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Terminal type: 4-pole spring terminal
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Maximum RS485 connection length: 1200 m
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Operating temperature: −25…+85 °C
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Storage/transport temperature: −40…+85 °C
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Relative humidity: 5…95%, non-condensing
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Maximum altitude: 3000 m
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Compliance: CE
⚡ Function in the Electrical System
ON-GRID photovoltaic system – inverter communication and monitoring.
The SMA 485i-Module is neither an inverter nor a power conversion device: it is a communication board/interface installed inside the SMA inverter to enable data exchange via the RS485 bus.
The connection allows the inverter to be integrated with compatible SMA communication and monitoring devices, such as data acquisition systems and monitoring devices. SMA documentation describes the module as an RS485 interface for wired inverter communication.
🏭 Construction and Installation
The module is housed in a compact black plastic enclosure, designed for installation in the specific compartment of the SMA inverter. It includes the internal ribbon cable, RS485 bus terminals and bus termination system.
SMA documentation provides two RS485 connectors, one of which can be used with the termination resistor. The module also provides Data+, Data− and GND connections and cable shielding.
The 485I-MOD-G1.BGCB version is documented by SMA for several inverter families, including Sunny Boy SB3000TL-20, SB3600TL-20, SB4000TL-20 and SB5000TL-20, as well as other Sunny Boy, Sunny Tripower and Windy Boy models compatible with this module version. Compatibility must nevertheless be verified according to the inverter model and revision before installation.
🛡️ Safety and Product Condition
New product. The box shows signs and discoloration caused by storage, while the module appears to be in good visual condition, with no obvious damage to the enclosure.
Installation must be carried out exclusively by qualified personnel. Before working inside the inverter, the equipment must be disconnected from both the AC and DC sides, as dangerous voltages may be present inside. Precautions against electrostatic discharge must also be taken when handling the board.
🚀 Final Description
The SMA 485i-Module DM-485CB-10 is an original SMA module for RS485 communication, intended for internal installation in compatible SMA inverters. The photographed version is identified as 485i-MOD-G1.BGCB, hardware B7, with two RS485 connections, spring terminals, bus termination and connection via ribbon cable.
It is a replacement particularly suitable for restoring or expanding wired RS485 communication on compatible SMA inverter generations. Official SMA documentation confirms the DM-485CB-10 code as a 485 data module / RS485 interface for various Sunny Boy and Sunny Tripower inverters.
