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EL3681 - Beckhoff EtherCAT Terminal Analog Input
Technical Specifications of Beckhoff EtherCAT Terminal Analog Input EL3681:
| Brand | Beckhoff |
| Product Type | EtherCAT Terminal Analog Input |
| Product | EL3681 |
EL3681 Beckhoff EtherCAT Terminal Analog Input Technical Specifications
| Specification | Value |
|---|---|
| Number of inputs | 1 voltage or 1 current (10 A/1 A) |
| Measurement error/uncertainty | 3 mรยฉ/0.2 รยฉ/12.5 Mรยฉ |
| Measurement error/uncertainty 2 | 0.01% DC voltage measurement at 40รยฐC |
| Housing - Design form | compact terminal housing with signal LEDs |
| Housing - Material | polycarbonate |
| Housing - Dimensions (W x H x D) | 12ร mm x 100ร mm x 68 mm |
| Housing - Installation | on 35 mm DIN rail, conforming to EN 60715 with lock |
| Housing - Side by side mounting by means of | double slot and key connection |
| Housing - Marking | labeling of the BZxxxx series |
| Housing - Wiring | solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver |
| Housing - Connection cross-section | s*: 0.08..2.5 mmยฒ,st*: 0.08...2.5 mmยฒ,f*: 0.14..1.5 mmยฒ |
| Housing - Connection cross-section AWG | s*: AWG28..14,st*: AWG28..14,f*: AWG26...16 |
| Housing - Stripping length | 8โฆ9 mm |
| Housing - Current load power contacts | Imax: 10 A |
| Conversion time | 0.5 s (1 s during measuring range switching) preset, min. 65 ms |
| Electrical isolation | 1500 V (E-bus/field potential) |
| Current consumption E-bus | 150 mA |
| Bit width in the process image | 32 bit data, 16 bit control/status |
| Special features | automatic or manual range selection, 1.25 A fuse installed + spare fuse, filter deactivatable |
| Weight | approx. 70 g |
| Operating temperature | -25...+60ยฐC |
| Storage temperature | -40....+85ยฐC |
| Relative humidity | 95%, no condensation |
| Vibration/shock resistance | conforms to EN 60068-2-6/EN 60068-2-27 |
| EMC immunity/emission | conforms to EN 61000-6-2/EN 61000-6-4 |
| Protect. rating/installation pos. | IP20/variable |
| Approvals/markings | CE |
| Pluggable wiring | for all ESxxxx terminals |
| Measuring current | 100 mA, 1 A and 10 A via high current path |
| Measuring voltage | 300 mV, 3 V, 30 V, 300 V |
| Measuring procedure | DC with arithmetic averaging, AC with true RMS value calculation |
| Update time | 0.5 s, 1 s for measuring range selection |
The Beckhoff EL3681 EtherCAT Terminal Analog Input is engineered to provide high-accuracy measurement of both voltage and current signals, making it suitable for demanding automation and testing environments. It supports ranges up to 300 V and 10 A, with automatic or manual measuring range selection. The module ensures reliable data capture with a conversion time of 0.5 seconds (minimum 65 ms) and delivers 32-bit measurement output for enhanced resolution. Integrated features such as a 1.25 A fuse with a spare, deactivatable filters, and arithmetic averaging for DC or true RMS calculation for AC signals make it robust for varied industrial use. Electrical isolation of 1500 V between E-bus and field potential further strengthens operational safety in high-voltage systems.
Built in a compact 12 mm terminal housing with diagnostic LEDs, the EL3681 simplifies installation on standard DIN rails and integrates seamlessly into EtherCAT networks. It consumes only 150 mA from the E-bus, ensuring efficiency while maintaining stable performance. Certified with CE approvals and designed to meet strict EMC immunity and vibration resistance standards, it is reliable for use in harsh factory environments. With an operational temperature range from -25ยฐC to +60ยฐC and a rugged polycarbonate build, it maintains consistency across varied industrial climates. Its pluggable wiring system further reduces downtime during maintenance or system expansions.
In real-world applications, the EL3681 EtherCAT Terminal Analog Input is widely deployed in energy monitoring, machine diagnostics, laboratory automation, and process quality control. Engineers benefit from its ability to provide accurate real-time data for current consumption analysis, voltage stability checks, and predictive maintenance tasks. OEMs and integrators prefer it for its plug-and-play compatibility with Beckhoffโs modular system, ensuring scalability in both small-scale and large-scale projects. Trusted for its precision, durability, and advanced design, the EL3681 is a go-to choice for industries seeking reliable analog signal monitoring in automation workflows.
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