BECKHOFF EL3602 EtherCAT Terminal: High-Precision Analog Input
The EL3602 is a 2-channel analog input terminal for EtherCAT systems. It digitizes voltage signals at 24-bit resolution. The terminal supports ±10 V, ±5 V, ±2.5 V, and ±1.25 V ranges. Each channel uses a differential input. Signals pass to the controller with 500 V electrical isolation. The compact housing fits standard 35 mm DIN rail. LED indicators show channel status.
Key Technical Data
- Inputs: 2 differential channels
- Signal ranges: ±10 V, ±5 V, ±2.5 V, ±1.25 V, parameterizable
- Resolution: 24 bit including sign
- Conversion time: 20 ms default, 1 to 400 ms configurable
- Measuring error: less than ±0.01 percent at 25 °C, 50 Hz filter
- Internal resistance: greater than 200 kΩ
- Input filter limit frequency: 3 kHz
- Common-mode voltage: max 35 V
- Crosstalk attenuation: greater than 60 dB
- Electrical isolation: 500 V between E-bus and signal voltage
- E-bus current: typical 190 mA
- Weight: approx. 60 g
- Operating temperature: -25 to +60 °C
- Storage temperature: -40 to +85 °C
- Humidity: 95 percent, no condensation
- Protection rating: IP20
- Installation position: variable
- Approvals: CE, UL, ATEX
- Ex marking: II 3 G Ex nA IIC T4 Gc
Housing and Wiring
- Design form: compact terminal housing with signal LEDs
- Material: polycarbonate
- Dimensions: 12 mm x 100 mm x 68 mm
- Mounting: 35 mm DIN rail, EN 60715, with lock
- Side by side mounting: double slot and key connection
- Wiring: spring actuation by screwdriver
- Connection cross-section solid: 0.08 to 2.5 mm²
- Connection cross-section flexible: 0.14 to 1.5 mm²
- Stripping length: 8 to 9 mm
- Current load power contacts: max 10 A
- ES3602 variant: pluggable wiring
Oiltech Controls Review
Oiltech Controls supplies the EL3602 for engineers who need stable analog acquisition in EtherCAT networks. The 24-bit resolution and differential inputs suit noise-prone cabinets. The EL3602 works well for slow to medium signals. Its configurable filter time helps reject vibration and electrical noise. We verify each unit before shipment. This terminal fits retrofit projects and new machine builds.
Oiltech Controls Insight: Suitable Equipment
- EtherCAT-based PLC systems
- Test benches for voltage measurement
- Packaging and printing machines
- Process control cabinets
- Legacy Beckhoff I/O upgrades
- ATEX zone 2 installations with proper housing
Why Buy From Oiltech Controls?
- Over 15 years in industrial automation spare parts
- Worldwide shipping support
- Tested surplus and refurbished options
- 12-month warranty
- Technical check before dispatch
- Help for obsolete control systems
Shipping, Warranty, and Lead Time
- Warranty: 12 months
- Dispatch: 24 to 28 hours after order confirmation
- Couriers: FedEx, UPS, DHL
- Tracking number provided after shipment
- Stock subject to prior sale
Professional FAQ
- Question: Can the EL3602 measure small signals in a noisy cabinet?
Answer: Yes. Differential inputs and greater than 60 dB crosstalk attenuation help reject noise. Use shielded twisted pair cables. Keep cable runs short. Ground the shield at one end. - Question: How do I choose between EL3602 and ES3602?
Answer: Both share the same analog specs. The ES3602 adds pluggable wiring. Choose ES3602 for fast service swaps. Choose EL3602 for fixed wiring and lower cost. - Question: What filter time should I set?
Answer: Start with the 20 ms default. Increase to 100 ms or more for slow, stable signals. Reduce filter time only when you need faster response. Longer filters improve noise rejection. - Question: Does the EL3602 support distributed clocks?
Answer: No. This terminal does not offer distributed clocks or oversampling. For synchronized motion tasks, select a different EtherCAT terminal with those features. - Question: Can I use the EL3602 in ATEX areas?
Answer: Yes, with the correct enclosure. The terminal carries II 3 G Ex nA IIC T4 Gc. You must follow local Ex installation rules. Always confirm the full system approval before use.
Contact Information
Inquiries: info@oiltechcontrols.com
Phone: +86 158 8020 0923
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