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Data Sheet: Bachmann EM203 – 3-Port Ethernet Master Module
Contact: ab@mooreplc.com | Same-day dispatch worldwide
1.Product Identity
EM203 is a 3-port Ethernet master module for Bachmann M1 controllers.
It turns any M1 rack into a Modbus-TCP/UDP/RTU gateway without external switches, making it the default choice for wind-turbine, marine and rolling-mill networks.
2.Verified Specifications (per vendor datasheet & CE marking)
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Parameter
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Value
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Ports
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3 × 10/100 Mbit/s RJ-45 (ETH0, ETH1, ETH2)
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Protocols
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Modbus TCP/UDP, RTU over TCP, HTTP, SNTP
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Port Isolation
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1.5 kV DC between each Ethernet port & backplane
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Processor
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ARM Cortex-A8, 400 MHz, 256 MB DDR3
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Memory
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16 MB flash for firmware, 1 MB SRAM for variables
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Power
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24 V DC (18–36 V DC), 3 W typical
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Operating Temp
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–40 °C … +85 °C
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Dimensions
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100 mm × 63 mm × 12 mm (3U)
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Weight
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0.2 kg
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Certifications
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CE, UL, marine (DNV, ABS, LR, BV, NK, KR, RINA)
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3.Typical Applications
• Offshore wind turbines – links turbine PLC to SCADA via Modbus-TCP over fiber.
• Ship engine rooms – distributes process data to three separate control zones.
• Steel-mill finishing lines – real-time speed reference to three drive islands.
4.Ready-to-Ship Package
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Part Number
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Description
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EM203
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3-port Ethernet master (this unit)
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NT255
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24 V DC 10 A supply
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BS207
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7-slot M1 backplane
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RS204
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RS-485/RS-232 serial module (optional)
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ETH-CBL-3M
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Cat-5e patch cable, 3 m
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Need pricing or overnight delivery?
Email: ab@mooreplc.com | Phone: +86-18106909650
All items factory-sealed, ready for same-day dispatch.
What happens next?
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Your quote
You’ll get a fully customized quote to fit your unique needs.
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