EL3356, EL3356-00x0 - Introduction
EL3356-00x0 - 1 channel precise resistor bridge analysis
The EL3356-00x0 analog input terminal enables the direct connection of a resistor bridge (strain gauge) or a load cell using a 4 or 6-wire connection technique. The ratio of the bridge voltage UD to the supply voltage UREF is determined with high precision in the input circuit and the final load value is calculated as a process value on the basis of the settings in the terminal. No further calculations are necessary in the PLC/controller.
The EL3356‑0020 with an individual factory working calibration certificate and the EL3356‑0030 with an external certificate are available as high-precision variants.
Please read the notes on the calibration certificate and identification features of these terminals.
The terminal family has the following features in order to meet as many requirements as possible:
- low measuring error of < ±0.01% (see Technical data)
- High resolution: 16-bit (EL3356) or 24-bit (EL3356-0010/-0020/-0030)
- fast measuring cycles: 10 ms (EL3356) or 100 µs (EL3356-0010/-0020/-0030)
- automatic self-calibration of the circuit (can be deactivated)
- adapted to synchronization via Distributed Clocks (EL3356-0010/-0020/-0030 only)
- manual input of the load cell characteristic values according to the load cell certificate (theoretical calibration) or automatic determination by means of calibration procedure
- Tare function
- Special functions for highly dynamic weighing: dynamic filter adaptation, mode change and input freeze
Thus, slow weighings can be performed with high precision using the EL3356. The EL3356‑0010/-0020/-0030 is particularly suitable for the fast and precise monitoring of torque or vibration sensors.
The terminal is not a stand-alone scale; it’s to be used only in conjunction with a PLC/controller.
EL3356-0090 - 1 channel precise resistor bridge analysis, TwinSAFE Single Channel
In addition to the full functionality of the EL3356-0010, the EL3356-0090 supports TwinSAFE SC (Single Channel) technology. This enables the use of standard signals for safety tasks in any networks of fieldbuses.