ELM370x-0000, ELM3704-0001, ELM3704-1001 - Introduction
2 and 4 channel multi-functional input, 24 bit, 10 ksps
The EtherCAT terminals from the ELM3xxx series were developed in order to enable the high-quality measurement of common electrical signals in the industrial environment. Flexibly usable measurement devices are especially useful in laboratory and testing technology environments. Therefore the ELM370x multifunction terminals feature an input circuit that can be set to 68 different measuring ranges with partly different types of connection technologies, of 2- to 6-wire connection, depending on the type: from voltages of ±60 V to ±20 mV, thus supporting thermocouples and IEPE, a current of ±20 mA, a resistance measurement of 5 kΩ and thus also temperature RTDs (PT100, etc.), measuring bridges and potentiometers. Thus, most electrical measuring tasks can be solved with just a single terminal. There is a choice of different connection types:
- The ELM3704-0001 with its high-quality LEMO connectors is mainly designed for laboratory use, where sensor configurations are changed on a daily basis, but a stable and reliable plug connection is nevertheless required.
- The 6-pin version with push-in (ELM3704-0000/ELM3702-0000) on the other hand is ideal for industrial use where a plug is unplugged less frequently for maintenance purposes and fast wiring is much more important.
- The ELM3704‑1001 is technically equivalent to the ELM3704‑0000, but it is only compensated in the thermocouple measurement and voltage measurement functions. The user can use the remaining measuring ranges of the ELM3704‑0000 (full/half/quarter-bridge, 20 mA, 5 kΩ/RTD, IEPE), but they must then be compensated on the system side depending on the application requirements. In the ELM3704‑1001 with its channel sampling rate of 10 kSps, a high-precision thermocouple measuring terminal is thus available for fast temperature changes in applications where the ELM3344 and ELM3348 terminals with 1 kSps per channel are no longer sufficient.
The other ELM3x0x terminals are price-optimized versions of the ELM370x basic class and thus ideal for use in machines with planned and foreseeable usage scenarios in which the measurement method of an analog input channel does not need to be changed at runtime. In return, they may have advanced features, like the ELM360x terminals (IEPE evaluation), which offer a switchable feed.
Optional calibration certificate:
- with factory calibration certificate as ELM370x-0020: on request
- external calibrated (ISO17025 or DAkks) as ELM370x-0030: on request
- Re-calibration service via the Beckhoff service: on request