Part Number: ELM3704-1001
Model: ELM3704-1001

Brand: Beckhoff

Product Series: Industrial Ethernet Module Series

Product Type: 4-Port Fast Ethernet Switch Module (Profinet Compatible, Unmanaged)

Core Application: Designed for industrial automation systems, machine control, and intelligent equipment network integration; specialized in Ethernet data transmission and signal switching in harsh industrial environments; widely used in PLC control systems, motion control platforms, and industrial IoT (IIoT) scenarios to realize stable network interconnection between Beckhoff controllers and peripheral devices.

Core Features: 4 independent Fast Ethernet ports; supports automatic MDI/MDI-X crossover; integrated surge protection for ports; compatible with Profinet and standard Ethernet protocols; fanless design for silent operation; seamless integration with Beckhoff TwinCAT system; high anti-interference performance for industrial sites.

Electrical Specifications

Operating Voltage: 24V DC (19.2V DC ~ 28.8V DC, wide voltage range)

Power Consumption: ≤3W (at rated load, all ports active)

Communication Protocol: IEEE 802.3, IEEE 802.3u, Profinet RT, TCP/IP, UDP/IP

Communication Rate: 10/100 Mbps (auto-negotiation for each port, half/full-duplex)

Data Processing Capacity: Supports wire-speed forwarding; maximum frame size 1522 bytes (Ethernet II), 1536 bytes (Profinet)

Bus Interface: Terminal block for power supply; RJ45 ports for Ethernet communication

Signal Level: Differential Ethernet signal (RJ45 ports); TTL level for power supply and status signals

Protection Functions: ESD protection (±8kV contact, ±15kV air) per IEC 61000-4-2; surge protection (2kV) per IEC 61000-4-5; overcurrent protection; undervoltage lockout; reverse polarity protection for power supply.

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