EL3208 Beckhoff EtherCAT Terminal 8-Channel RTD Pt100 16 bit

EL3208 Beckhoff EtherCAT Terminal, 8-Channel RTD Input, Pt100, 16 bit

The EL3208 is an 8-channel analog input terminal from Beckhoff. It reads resistance sensors directly. The HD housing is only 12 mm wide. Each channel supports 2-wire RTD wiring. It handles Pt100, Pt1000, Ni120, Ni1000, and KTY types. Resolution is 0.1 °C per digit. Measuring error stays under ±0.5 °C for Pt sensors. The terminal converts resistance to temperature onboard. Status LEDs and process image bits show channel health. It suits dense temperature monitoring in EtherCAT systems.

Oiltech Controls’s Insight

• Eight channels in 12 mm saves DIN rail space. That matters in crowded control cabinets.
• The integrated digital filter cuts noise on long sensor runs. Filter frequency is typically 1 kHz.
• Conversion time is configurable from 3 ms to 1600 ms. Default is about 170 ms. You can trade speed for stability.
• Limit value monitoring runs inside the terminal. This reduces PLC scan load.
• Electrical isolation is 500 V between E-bus and signal. That protects the controller from field faults.
• Measuring current stays below 0.5 mA. Self-heating at the sensor stays low.

Oiltech Controls Review

• We supply the EL3208 as tested surplus or refurbished stock. Each unit is checked before packing.
• Engineers use it to replace failed RTD cards in older EtherCAT racks. The 12 mm HD width keeps the same rail footprint.
• Only 2-wire technology is supported. For long cable runs, check lead resistance error before you commit.
• The terminal needs no external power. It draws about 140 mA from the E-bus.
• For support, email info@oiltechcontrols.com or message +86 158 8020 0923 on WhatsApp.

Technical Data

Which Equipment Uses This Terminal?

• EtherCAT control cabinets with many RTD points.
• Plastic molding machines that watch barrel temperature.
• Food processing lines with Pt100 probes.
• Test benches that log eight channels at once.
• Retrofit racks replacing older 8-channel RTD cards.
• Ovens and dryers with Ni1000 or KTY sensors.

Installation Notes

• Snap onto a 35 mm DIN rail per EN 60715.
• Join side by side using the double slot and key.
• Use 2-wire RTD wiring per channel.
• Strip wires to 8 … 9 mm.
• Solid wire goes in directly. Stranded wire needs a screwdriver to open the spring.
• Label with BZxxx series markers.

Commissioning and Maintenance

• Check LEDs and process image bits for channel state.
• Set the sensor type in the EtherCAT configuration.
• Tune conversion time from 3 ms to 1600 ms as needed.
• Enable limit value monitoring to cut PLC load.
• Verify lead resistance on long 2-wire runs.
• Keep ambient between -25 °C and 60 °C.

Why Buy From Oiltech Controls?

• More than 15 years in industrial automation spare parts.
• Shipping to most countries worldwide.
• Tested surplus and refurbished options in stock.
• 12-month warranty on eligible products.
• Technical check before every shipment.
• Help with obsolete control systems.
• Contact: info@oiltechcontrols.com or +86 158 8020 0923 on WhatsApp.

Shipping, Warranty and Packing

• Shipping methods: FedEx, UPS, DHL.
• Dispatch in 24 to 28 hours after payment.
• Warranty: 12 months against defects.
• Packing list: 1 x Beckhoff EL3208 EtherCAT terminal.
• Technical verification before shipment.

FAQ

Q: Can I use 3-wire or 4-wire Pt100 sensors with this terminal?

A: No. The EL3208 is 2-wire only. For 3-wire or 4-wire, choose a different EL3xxx model. With 2-wire, long cables add lead resistance error. Keep runs short or compensate in software.

Q: How fast can this terminal read temperature?

A: Default conversion time is about 170 ms. You can set it from 3 ms to 1600 ms. Faster settings may increase noise. Balance speed and stability for your process.

Q: My readings drift. What should I check first?

A: Check wiring first. Loose terminals and long 2-wire runs are common causes. Also confirm the sensor type in the config. Use the digital filter and limit monitoring to catch faults early.

Q: What sensor types does it support?

A: It reads Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, and KTY types. It also measures plain resistance, such as a potentiometer from 10 Ω to 1/4 kΩ. Set the type in the EtherCAT configuration.

Q: How do I pick the right replacement?

A: Match the channel count, sensor type, and 2-wire technology. Confirm the 12 mm HD housing fits your rail. Check approvals CE and UL for your site. Send us the old label if unsure.

Long-Tail Keywords

• Beckhoff EL3208 8-channel RTD EtherCAT terminal
• EL3208 Pt100 input terminal 16 bit 12 mm
• Beckhoff EL3208 2-wire temperature input module
• EL3208 EtherCAT terminal obsolete replacement
• Beckhoff EL3208 refurbished with 12-month warranty

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