The EtherCAT Terminals from the ELM series were developed in order to enable the high-quality measurement of common electrical signals in the industrial environment. Flexibly usable measurement modules are especially useful in laboratory and testing technology environments. Therefore the ELM370x multifunction modules feature an input circuit that can be set to over 30 different types of electrical connection via EtherCAT: 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, and all of this with a 2- to 6-wire connection, depending on the type. Thus, most electrical measuring tasks can be solved with just a single module. 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.
Features | ELM370x |
---|---|
Voltage measurement | ±60/30/10/5/2.5/1.25 V, ±640/320/160/80/40/20 mV, 0…5/10 V (2-wire connection) |
Current measurement | ±20 mA, 0/4…20 mA, NAMUR NE43 (2-wire connection) |
Strain gauge | quarter bridge (350 Ω + 120 Ω), half bridge (±16 mV/V), full bridge (±32 mV/V), internal bridge completion and supply adjustable 0…5 V (2-/3-/4-/5-/6-wire connection) |
IEPE measurement | current feed 2 mA, acquisition of the modulated AC voltage, AC/DC coupling (parameterisable high-pass) |
Potentiometer measurement | potentiometer ≥ 1 kΩ, supply integrated and adjustable 0…5 V |
Resistance measurement | 0…5 kΩ (2-/3-/4-wire connection) |
Temperature measurement (RTD) | PT100, PT200, PT500, PT1000, Ni100, Ni120, Ni1000, diverse KT/KTY (types see documentation) (2-/3-/4-wire connection) |
Temperature measurement (thermocouple) | type K, J, L, E, T, N, U, B, R, S, C; internal cold junction measurement (2-wire connection) |
Technical data | ELM3704-0000 |
---|---|
Number of channels | 4 |
Technology | multi-function |
Signal type | differential |
Connection technology | 2-/3-/4-/5-/6-wire |
Connection type | push-in, service plug, 6-pin |
Max. sampling rate | max. 100 µs/10 ksps |
Oversampling factor | n = 1…100 selectable (max. 10 ksamples/s) |
Internal resistance | > 500 kΩ (30 V); > 4 MΩ (others); 150 Ω (current) |
Measuring error | typ. ±100 ppm/±0.01 % relative to the respective full scale value @ 23 °C in some measuring ranges, see documentation |
Temperature coefficient | typ. < 10 ppm/K in some measuring ranges, see documentation |
Functional diagnostics | yes |
Connection diagnostics | broken wire/short-circuit |
Distributed clocks | yes, oversampling n = 1…100, accuracy << 1 µs |
Current consumption power contacts | – |
Current consumption E-bus | typ. 400 mA |
Weight | approx. 350 g |
Operating/storage temperature | -25…+60 °C/-40…+85 °C |
Thermal dissipation | typ. 3 W |
Special features | ExtendedRange 107 %, free numeric filter, TrueRMS, integrator/differentiator, non-linear scaling, PeakHold |
Approvals | CE |
Accessories | |
---|---|
ZS9100-0002 | shield connection for ELM series, shield diameter 7…16 mm |
ZS9100-0003 | shielding hood with EMC gland for EtherCAT measurement modules with push-in connector (ELM3xxx-0000), to provide shielding against external interference and temperature stabilisation at the measuring points when measuring temperature; black, scope of supply: shielding hood, screws |
Analog Input-Multi-functional input 4-chanel-ELM3704-0000 Beckhoff
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