Description
The Beckhoff EL2502 is a 2-channel EtherCAT PWM output terminal designed to generate pulse width-modulated signals for controlling analog functions in industrial automation. Operating at 24 V DC with 0.5 A per channel, it provides adjustable frequency and duty cycle settings with overload and short-circuit protection for reliable, precise signal generation.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Beckhoff |
| Category |
Industrial Automation |
| Part Number |
EL2502 |
| Subcategory |
EtherCAT PWM Output Terminal |
| Connection Technology |
PWM output, push-pull outputs |
| Number of Outputs |
2 |
| Nominal Voltage |
24 V DC (-15% / +20%) |
| Load Type |
Ohmic, inductive, lamp load |
| Max. Output Current |
0.5 A per channel (short-circuit proof) |
| Short-Circuit Current |
Typ. < 1.5 A |
| Base Frequency |
1 Hz…125 kHz (default 250 Hz) |
| Duty Factor Range |
0–100% (TON > 750 ns, TOFF > 500 ns) |
| Resolution |
9–15 bit |
| Distributed Clocks |
Not supported |
| Reverse Voltage Protection |
Yes |
| Configuration |
Via TwinCAT System Manager |
| Electrical Isolation |
500 V (E-bus / field potential) |
| Current Consumption (E-bus) |
Typ. 140 mA |
| Current Consumption (Power Contacts) |
Typ. 30 mA |
| Bit Width in Process Image |
2 × 16 bit PWM output |
| Special Features |
Individual frequency adjustment per channel |
| Protection Rating |
IP20 |
| Operating Temperature |
-25°C to +55°C |
| Storage Temperature |
-40°C to +85°C |
| Relative Humidity |
Up to 95%, non-condensing |
| Vibration/Shock Resistance |
EN 60068-2-6 / EN 60068-2-27 compliant |
| EMC Immunity/Emission |
EN 61000-6-2 / EN 61000-6-4 compliant |
| Pluggable Wiring |
Supported for ESxxxx terminals |
| Approvals/Markings |
CE, CCC, UL, ATEX, IECEx |
| Weight |
50 g (approx. 0.11 lbs) |
Information About EL2502
The EL2502 belongs to Beckhoff’s EtherCAT I/O terminal series and functions as a two-channel PWM output module for generating pulse width-modulated signals. It can control analog-driven actuators, valves, and lighting systems with fine resolution and adjustable duty cycles. Each channel supports an independent frequency setting between 1 Hz and 125 kHz, offering great flexibility in timing control applications. With a 24 V DC nominal voltage and short-circuit-proof output stage, the EL2502 ensures durable and safe operation. Its electrical isolation of 500 V between field potential and the E-bus provides additional signal integrity and system safety. Configuration is conveniently handled via the TwinCAT System Manager software, making integration into EtherCAT automation networks straightforward and efficient.
Key Features:
- Dual-Channel PWM Output: Two independently configurable PWM channels for flexible signal generation.
- High Frequency Range: Adjustable from 1 Hz to 125 kHz, suitable for a variety of control applications.
- Adjustable Duty Cycle: 0–100% mark/space ratio controlled by 16-bit input values for precision modulation.
- Short-Circuit Protection: Built-in safety against overload and short-circuit events on each output.
- Electrical Isolation: 500 V separation between field potential and E-bus ensures stable operation.
- Independent Channel Configuration: Each output channel can be set to a unique frequency and duty factor.
- Push-Pull Output Stage: Capable of driving ohmic, inductive, or lamp loads efficiently.
- Integrated LED Indicators: Channel LEDs reflect output state and duty cycle brightness for quick diagnostics.
- High Resolution Control: 9–15 bit resolution allows accurate analog-equivalent signal control.
- Reverse Polarity Protection: Safeguards against incorrect wiring or voltage reversal.
- Compact EtherCAT Design: Standard terminal format fits seamlessly into modular Beckhoff I/O systems.
- Software Integration: Fully supported by TwinCAT System Manager for configuration and parameter setting.
- Industrial Durability: Wide operating temperature range and compliance with EMC and vibration standards.
- Flexible Mounting: DIN-rail installation with pluggable wiring option for easy maintenance.
- Certified Quality: CE, UL, ATEX, and IECEx approvals ensure global usability and compliance.
The EL2502 delivers the reliability and precision required for high-speed signal modulation, motor control, lighting systems, and industrial actuation tasks.
