Beckhoff EL6021 EtherCAT RS422/RS485 Serial Interface Terminal for Industrial Automation
BECKHOFF · HMIs & Displays
Description The Beckhoff EL6021 is a single-channel EtherCAT terminal designed to interface devices using RS422 or RS485 serial communication. Operating independently of the fieldbus system, it supports full- or half-duplex data transmission up to 115.2 kbaud. Its differential signal transmission and electrical isolation enhance interference immunity for reliable serial communication. Technical Specifications Condition New/Never Used Surplus Brand BECKHOFF Category Computer Part Number EL6021 Subcategory Communication Cable/Adaptor Product Type EtherCAT Serial Interface Terminal Communication Interface 1× RS422/RS485 Data Transfer Rates 2400–115,200 baud (default 9600 baud, 8-N-1) Duplex Modes Full or half duplex Line Impedance 120 Ω Maximum Cable Length Approx. 1000 m (twisted pair) Bit Transfer Method Differential signaling Electrical Isolation 500 V (E-bus/signal) Receive Buffer 864 bytes Transmit Buffer 128 bytes Power Supply Via E-bus Current Consumption (E-bus) Typical 170 mA Operating Temperature –25…+60°C Storage Temperature –40…+85°C Relative Humidity Up to 95%, non-condensing Protection Rating IP20 Housing Material Polycarbonate Dimensions 12 × 100 × 68 mm (W × H × D) Mounting 35 mm DIN rail (EN 60715) Wiring Type Solid, stranded, or ferrule; spring clamp Conductor Sizes 0.08–2.5 mm² (AWG 28–14) Stripping Length 8–9 mm Power Contact Rating Imax 10 A Approvals CE, UL, ATEX, IECEx, cFMus Information About EL6021 The EL6021 belongs to the Beckhoff EtherCAT I/O system, offering robust serial communication capabilities within compact terminal housing. It is designed to connect RS422/RS485 field devices directly to an EtherCAT coupler without requiring external converters. With 864-byte receive and 128-byte transmit buffers, the terminal efficiently handles serial data streams and supports configuration directly through the PLC. Typical applications include linking measurement devices, sensors, controllers, and industrial communication equipment that require long-distance, noise-resistant serial links. Key Features: RS422/RS485 support: One serial channel for differential full- or half-duplex communication. Wide baud rate range: Operates from 2400 to 115,200 baud with a 9600-baud default. Electrically isolated design: 500 V isolation between E-bus and signal voltage. Long-distance capability: Supports up to 1000 m cable length with twisted pair wiring. Integrated buffers: 864-byte receive and 128-byte transmit buffers for smooth data handling. Compact EtherCAT terminal: 12 mm width for space-efficient DIN-rail installations. Pluggable wiring: Compatible with ES-series wiring modules for easy termination. Industrial resilience: Rated IP20 with –25…60°C operating range. The EL6021 delivers the reliability and precision required for industrial RS422/RS485 serial communication within EtherCAT automation systems.
Brand: BECKHOFF · Category: HMIs & Displays
Key features
- RS422/RS485 support: One serial channel for differential full- or half-duplex communication.
- Wide baud rate range: Operates from 2400 to 115,200 baud with a 9600-baud default.
- Electrically isolated design: 500 V isolation between E-bus and signal voltage.
- Long-distance capability: Supports up to 1000 m cable length with twisted pair wiring.
- Integrated buffers: 864-byte receive and 128-byte transmit buffers for smooth data handling.
- Compact EtherCAT terminal: 12 mm width for space-efficient DIN-rail installations.
- Pluggable wiring: Compatible with ES-series wiring modules for easy termination.
- Industrial resilience: Rated IP20 with –25…60°C operating range.
Specifications
| Manufacturer part number | EL6021 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | BECKHOFF |
| Category | Computer |
| Part Number | EL6021 |
| Subcategory | Communication Cable/Adaptor |
| Product Type | EtherCAT Serial Interface Terminal |
| Communication Interface | 1× RS422/RS485 |
| Data Transfer Rates | 2400–115,200 baud (default 9600 baud, 8-N-1) |
| Duplex Modes | Full or half duplex |
| Line Impedance | 120 Ω |
| Maximum Cable Length | Approx. 1000 m (twisted pair) |
| Bit Transfer Method | Differential signaling |
| Electrical Isolation | 500 V (E-bus/signal) |
| Receive Buffer | 864 bytes |
| Transmit Buffer | 128 bytes |
| Power Supply | Via E-bus |
| Current Consumption (E-bus) | Typical 170 mA |
| Operating Temperature | –25…+60°C |
| Storage Temperature | –40…+85°C |
| Relative Humidity | Up to 95%, non-condensing |
| Protection Rating | IP20 |
| Housing Material | Polycarbonate |
| Dimensions | 12 × 100 × 68 mm (W × H × D) |
| Mounting | 35 mm DIN rail (EN 60715) |
| Wiring Type | Solid, stranded, or ferrule; spring clamp |
| Conductor Sizes | 0.08–2.5 mm² (AWG 28–14) |
| Stripping Length | 8–9 mm |
| Power Contact Rating | Imax 10 A |
| Approvals | CE, UL, ATEX, IECEx, cFMus |
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