Tutto sui PLC: la CPU
A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...
The EL4021 is a high-precision EtherCAT Terminal from Beckhoff, featuring a 1-channel analog output capable of generating a 4…20 mA current signal. Designed for industrial control systems, this module utilizes 12-bit resolution to provide accurate output control with a conversion time of approximately 100 µs. The EL4021 supports Distributed Clocks (DC), enabling highly precise synchronization across an EtherCAT network with a precision of << 1 µs.
| Feature | Specification |
|---|---|
| Manufacturer | Beckhoff |
| Model | EL4021 |
| Number of Outputs | 1 |
| Signal Current | 4…20 mA |
| Resolution | 12 bit |
| Conversion Time | ~ 100 µs |
| Load | < 500 Ω |
| Electrical Isolation | 500 V (E-bus/signal voltage) |
| Power Supply | 24 V DC via power contacts |
| Current Consumption | 25 mA (power contacts), 140 mA (E-bus) |
| Dimensions (W x H x D) | 12 mm x 100 mm x 68 mm |
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
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Returns & Warranty

The EL4021 is a high-precision EtherCAT Terminal from Beckhoff, featuring a 1-channel analog output capable of generating a 4…20 mA current signal. Designed for industrial control systems, this module utilizes 12-bit resolution to provide accurate output control with a conversion time of approximately 100 µs. The EL4021 supports Distributed Clocks (DC), enabling highly precise synchronization across an EtherCAT network with a precision of << 1 µs.
| Feature | Specification |
|---|---|
| Manufacturer | Beckhoff |
| Model | EL4021 |
| Number of Outputs | 1 |
| Signal Current | 4…20 mA |
| Resolution | 12 bit |
| Conversion Time | ~ 100 µs |
| Load | < 500 Ω |
| Electrical Isolation | 500 V (E-bus/signal voltage) |
| Power Supply | 24 V DC via power contacts |
| Current Consumption | 25 mA (power contacts), 140 mA (E-bus) |
| Dimensions (W x H x D) | 12 mm x 100 mm x 68 mm |
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Dots
|
| Country of origin |
Germany
|