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ELM3704-0020 | EtherCAT Terminal, 4-channel analog input, multi-function, 24 bit, 10 ksps, factory calibrated

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ELM3704-0020 | EtherCAT Terminal, 4-channel analog input, multi-function, 24 bit, 10 ksps, factory calibrated

ELM3704-0020 | EtherCAT Terminal, 4-channel analog input, multi-function, 24 bit, 10 ksps, factory calibrated

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ELM3704-0020 | EtherCAT Terminal, 4-channel analog input, multi-function, 24 bit, 10 ksps, factory calibrated

ELM3704-0020 | EtherCAT Terminal, 4-channel analog input, multi-function, 24 bit, 10 ksps, factory calibrated

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 multi-function 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.

The other ELM3x0x modules are price-optimized versions of the ELM370x universal module 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 modules (IEPE evaluation), which offer a switchable feed.

Extensive documentation is available from Beckhoff sales, support or measurement@beckhoff.com.

This ELM3xxx series measurement terminal enables efficient implementation of complex system-integrated data acquisition systems (DAQ) that place high demands on measurement accuracy and time synchronization.

Product status:

regular delivery

Product information

System dataELM370x
Strain gaugequarter bridge (350 Ω + 120 Ω, ±2/4/8/32 mV/V), half bridge (±2/16 mV/V), full bridge (±2/4/32 mV/V), internal bridge completion and supply adjustable 0…5 V (2-/3-/4-/5-/6-wire connection)
Voltage measurement±60/10/5/2.5/1.25 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)
IEPE measurement±2,5/5/10 V, current feed 2 mA, acquisition of the modulated AC voltage, AC/DC coupling (parameterizable high-pass), (2-wire connection)
Potentiometer measurementpotentiometer ≥ 1 kΩ, supply integrated and adjustable 0…5 V (3-/5-wire connection)
Resistance measurement0…50 Ω, 0…200 Ω, 0…500 Ω, 0…2 kΩ, 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 A1, A2, A3, B, C, D, E, G, J, K, L, N, P, R, S, T, U and others; internal/external cold junction measurement (2-wire connection)
Technical dataELM3704-0020
Number of channels4
Technologymulti-function
Signal typedifferential
Connection technology2-/3-/4-/5-/6-wire
Connection typepush-in, service plug 6-pin
Max. sampling ratemax. 100 µs/10 ksps (per channel, simultaneously)
Oversampling factorn = 1…100 selectable (max. 10 ksamples/s)
Internal resistance> 500 kΩ (60 V); > 4 MΩ (others); 150 Ω (current)
Measurement error/uncertaintytyp. < ±100 ppm/±0.01% in some measuring ranges, relative to the respective full scale value, see documentation
Temperature coefficientup to typ. < 1 ppm/K in some measuring ranges, see documentation
Functional diagnosticsyes
Connection diagnosticsbroken wire/short circuit
Distributed clocksyes, accuracy << 1 µs
Resolution24 bit (incl. sign)
Electrical isolation channel/channelno
Electrical isolation channel/bus707 V DC (type test)
Electrical isolation channel/SGND707 V DC (type test)
Current consumption power contacts
Current consumption E-bustyp. 890 mA
Weightapprox. 350 g
Operating/storage temperature0…+55°C/-25…+85°C
Thermal dissipationtyp. 3 W
Special featuresExtendedRange 107%, free numeric filter, TrueRMS, integrator/differentiator, non-linear scaling, PeakHold, factory calibrated version of ELM3704-0000
Approvals/markingsCE, UL
Housing dataELM-30-xpin
Design formmetal housing with signal LEDs
Materialzinc die-cast
Dimensions (W x H x D)30 mm x 100 mm x 95 mm
Installationon 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means ofdouble slot and key connection
Marking
Wiringsolid conductors (s): direct plug-in technique; fine-stranded conductors (st) and ferrule (f): spring actuation by screwdriver
Connection cross-sections*: 0.2…1.5 mm²,
st*: 0.2…1.5 mm²,
f*: 0.25…0.75 mm²
Connection cross-section AWGs*: AWG24…14,
st*: AWG24…14,
f*: AWG24…14
Stripping length8…9 mm

*s: solid wire; st: stranded wire; f: with ferrule

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