Beckhoff ELM3704-0000 ELM Series EtherCAT Terminal

Description

High-precision measurement in industrial testing, laboratory setups, and automation environments is achieved with the Beckhoff ELM3704-0000 multi-function measurement module. This EtherCAT Terminal features four analog input channels capable of high-speed, high-resolution data acquisition at up to 24 bits. It operates in highly synchronized networks using Distributed Clocks technology, achieving synchronization accuracy well below 1 microsecond.

Designed for versatile signal acquisition, the module supports differential signal configurations and flexible connection mechanics. Built within a rugged zinc die-cast housing, it ensures structural stability and thermal dissipation for industrial environments. Advanced onboard signal processing functions, including TrueRMS calculation, PeakHold, integrator/differentiator operations, and custom non-linear scaling, allow immediate engineering value extraction directly at the I/O level.

Features

• Four high-precision multi-function analog input channels.
• High-resolution analog-to-digital conversion up to 24 bits (including sign).
• Simultaneous acquisition with a sampling rate of up to 10 ksps (100 us) per channel.
• Selectable oversampling factor from n = 1 to 100.
• Flexible wiring options supporting 2-, 3-, 4-, 5-, and 6-wire connection configurations.
• Integrated diagnostic features, including broken wire and short-circuit detection.
• Robust zinc die-cast housing equipped with status LEDs for diagnostic visualization.

Applications

• Industrial test benches and engine dynamometers.
• High-speed manufacturing quality control and inline inspection systems.
• Vibration analysis and structural health monitoring.
• Multi-sensor calibration and laboratory testing systems.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mounting: Mount horizontally on a 35 mm DIN rail according to EN 60715. Ensure the locking lever is securely engaged.
• Side-by-Side Placement: Connect adjacent terminals using the integrated double slot and key system to maintain mechanical alignment.
• Wiring: Insert solid conductors directly into the push-in clamp. For fine-stranded or ferruled wiring, actuate the internal spring with a flat-head screwdriver before insertion.
• Grounding: Guarantee low-resistance functional grounding via the DIN rail to optimize high-frequency noise rejection.
• Thermal Considerations: Maintain adequate clearance above and below the module to allow convection cooling. Ensure operating ambient temperatures stay within the specified range of 0 to +55 degC.

Compliance and Certifications

• CE
• UL