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Beckhoff EL3318 EtherCAT Terminal 8‑Channel Thermocouple Analog Input, 16‑bit Resolution, 2‑wire, 12×100×68 mm
Regular price
$350.00 USD
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$350.00 USD
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Overview
The Beckhoff EL3318 is a high‑density EtherCAT Terminal that provides eight thermocouple analog input channels in just 12 mm width. It supports direct connection of thermocouples in 2‑wire technique, performs internal cold‑junction compensation, and linearizes the full temperature range per channel. Wire‑break is indicated by LEDs. The terminal can also be used for low‑level mV measurements.
Key Features
- 8 thermocouple inputs in a 12 mm HD housing
- Thermocouple types: B, C, E, J, K, L, N, R, S, T, U (default: K)
- 16‑bit resolution; selectable representation (0.1/0.01 °C or 1/2/4 µV per digit)
- Internal cold‑junction compensation; channel‑by‑channel wire‑break detection
- Selectable firmware filter; input filter limit frequency typ. 1 kHz
- Also supports ±30/±60/±75 mV voltage measurement
Applications
- Multi‑point temperature acquisition with thermocouples in compact control panels
- General precision low‑level mV sensing on EtherCAT systems
Specifications
| Specific MPN | EL3318 |
| Function | 8‑channel analog input for thermocouples / mV measurement |
| Connection Method | 2‑wire |
| Thermocouple Types | B, C, E, J, K, L, N, R, S, T, U (default K) |
| Resolution | 16 bit; representation 0.1/0.01 °C or 1/2/4 µV per digit |
| Voltage Measurement Ranges | ±30 / ±60 / ±75 mV |
| Input Filter Limit Frequency | typ. 1 kHz |
| Conversion Time | approx. 3.5 s to 30 ms (config./filter dependent); default ~380 ms |
| Measurement Uncertainty (TC) | At 23°C with internal CJ: B ±6.3°C; C ±4.9°C; E ±3.1°C; J ±3.2°C; K ±3.0°C; L ±3.1°C; N ±3.4°C; R ±5.2°C; S ±5.4°C; T ±3.3°C; U ±3.2°C |
| Measurement Uncertainty (mV) | at ±75 mV, 23°C: < ±0.096% of full scale |
| Cold‑Junction Compensation | Internal (at terminal); external CJ also supported |
| Special Functions | Wire‑break detection per channel; adjustable firmware filter |
| Electrical Isolation | 500 V (E‑bus / signal voltage) |
| Current Consumption (E‑bus) | typ. 210 mA |
| Dimensions (W × H × D) | 12 mm × 100 mm × 68 mm; HD housing; IP20 |
| Approvals | CE, CCC, UL, ATEX, IECEx, cFMus |
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