ELM370x - Technical data

Analog inputs

2 channel (differential)

4 channel (differential)

Time relation between channels to each other

Simultaneous conversion of all channels in the terminal, synchronous conversion between terminals, if DistributedClocks will be used

ADC conversion method

ΔΣ (Delta-Sigma) with internal sample rate

8 Msps

8 Msps

Cutoff frequency input filter hardware
(see explanations in chapter
Firmware filter concept)

Before AD converter:
hardware low pass -3 dB @ 30 kHz
type butterworth 3th order

Within ADC after conversion:

Low pass
-3 dB @ 2.6 kHz, ramp-up time 300 µs

Low pass
-3 dB @ 2.6 kHz, ramp-up time 300 µs

Type sinc3/average filter

The ramp-up time/ settling time/ delay caused by the filtering will be considered within the DistributedClocks-Timestamp.

Resolution

24 bit (including sign)

Connection technology

2/3/4/5/6-wire

Sampling rate (per channel, simultaneous)

100 µs/10 ksps

Free down sampling by Firmware via decimation factor

Oversampling

1…100 selectable

Supported EtherCAT cycle time

(depending on the operation mode)

DistributedClocks: min. 100 µs, max. 10 ms

FrameTriggered/Synchron: min. 200 µs, max. 100 ms

FreeRun: not yet supported

Internal resistance

> 500 kΩ (60 V); > 4 MΩ (other) ; 150 Ω (current)

Operation range voltage measurement

±60/10/5/2.5/1.25 V,
±640/320/160/80/40/20 mV,
0…5/10 V ³⁾

2-wire-connection

Operation range current measurement

±20 mA, 0/4…20 mA, NAMUR NE43 ³⁾

2-wire-connection

Operation range SG, measuring bridge

Full bridge

Full bridge (±2/4/8/32 mV/V) ³⁾,

4/6-wire-connection,

Bridge supply adjustable

Half bridge

Half bridge (±2/16 mV/V) ³⁾, internal switched bridge extension,

3/5-wire-connection

Bridge supply adjustable

Quarter bridge

Quarter bridge 120 Ω and 350 Ω (±2/4/8/32 mV/V) ³⁾, internal switched bridge extension,

2/3-wire-connection,

Bridge supply adjustable

Operation range IEPE

Measuring ranges ±2.5/5/10 V ³⁾ adjustable,

Current supply/ / I_EXCITE (IEPE Bias Current) 2 mA (shutdown not possible),

Acquisition of the modulated alternating voltage,

AC/DC coupling (configurable parameters of high pass),

2-wire-connection

(note: TEDS Class 1 not supported)

Operation range potentiometer

Potentiometer ≥ 1 kΩ, power supply integrated and adjustable 0…5V ³⁾

3/5-wire-connection

Operation range resistance measurement

0…50 Ω, 0…200 Ω, 0…500 Ω, 0…2 kΩ, 0…5 kΩ ³⁾

2/3/4-wire-connection

Operation range temperature (RTD)

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, div. KT/KTY ³⁾

2/3/4-wire-connection

Operation range temperature (thermocouple)

Typ K, J, L, E, T, N, U, B, R, S, C, cold junction measurement internal/external,

2-wire-connection

Connection diagnosis

Wire break/short cut

Internal analog ground AGND

Existing by external connection to -Uv

Surge voltage protection of the inputs related to GND

Value to follow

Internal power supply

via E-bus

Current consumption E-bus

typ. 530 mA

typ. 890 mA

Current consumption power contacts

-

Thermal power dissipation

typ. 3 W

Dielectric strength - destruction limit

Max. permitted short-term/continuous voltage between each contact points ±I1, ±I2, +Uv and –Uv: non-supplied ±40 V, supplied ±36 V

Note: -Uv corresponds to internal AGND

Recommended operation voltage range to compliance with specification

Max. permitted voltage during specified normal operation between ±I1 and ±I2: typ.

±35 V against –Uv within 60 V-measuring range

±10 V against –Uv in all other measurement ranges

Note: -Uv corresponds to internal AGND

Distributed Clocks

Yes, with Oversampling n = 1…100, accuracy << 1 μs

Special features

Extended Range 107 %, freely configurable numeric filters, TrueRMS, integrator/differentiator, non-linear scaling, PeakHold

Functional diagnosis ¹⁾

Yes

Electrical isolation channel/channel ²⁾

no

Electrical isolation channel/E-Bus ²⁾

Functional insulation, 707 V DC (type test)

Electrical isolation channel/SGND ²⁾

Functional insulation, 707 V DC (type test)

Configuration

via the EtherCAT Master, e.g. TwinCAT

Note to cable length

Signal cable lengths to the sensor / encoder over 3 m must be shielded, the shield design must be in line with the state of the art and be effective. For larger cable lengths > 30 m, a suitable surge protection should be provided if appropriate interference could affect the signal cable.

Connection type

6-pin push-in cage clamp, service plug

ELM3704‑0000,
ELM3704‑0020,
ELM3704‑1001:
6-pin push-in cage clamp, service plug

ELM3704-0001:
8-pin LEMO 1B

Dimensions (W x H x D)

See chapter Housing

Mounting

on 35 mm rail conforms to EN 60715

Note Mounting

Plug partly not within scope of delivery, see chapter

Notes on connection technology

Weight

Approx. 350 g

Permissible ambient temperature range during operation

0…+55 °C

Permissible ambient temperature range during storage

-25…+85 °C

Permissible operating altitude range

0 up to 2000 m (derating at higher altitudes on request)

Relative humidity

max. 95%, no condensation

Protection class

IP 20

Vibration-/shock resistance

Conforms to EN 60068-2-6 / EN 60068-2-27

EMC-resistance / emission

Conforms to EN 61000-6-2 / EN 61000-6-4

Approvals/ markings *⁾

CE, UKCA, EAC, cULus

EMC notes

In case of push-in and mini-TC connectors, ESD air discharges conforming to EN 61000-6-4 into the connectors or to the lines connected there can lead to measurement deviations up to ±FSV within the respective channel or to other channels by crosstalk.

Peak voltages (surge) conforming to EN 61000-6-2 that are applied to the cable shield can lead to measurement deviations up to ±FSV.