ELM334x - Technical data

Analog inputs

4 channel (differential)

8 channel (differential)

Time relation between channels to each other

Simultaneous conversion of all channels in the terminal (multiplex), synchronous conversion between terminals, if DistributedClocks will be used. Timestamp each channel, typ. sampling offset related to channel 1:

Ch.1: 0 µs
Ch.2: +200 µs
Ch.3: +400 µs
Ch.4: +600 µs

Ch.1: 0 µs
Ch.2: +100 µs
Ch.3: +200 µs
Ch.4: +300 µs
Ch.5: +400 µs
Ch.6: +500 µs
Ch.7: +600 µs
Ch.8: +700 µs

ADC conversion method

ΔΣ (Delta-Sigma) with internal sample rate 8 Msps

Cutoff frequency input filtering hardware
(see explanations within chapter

ELM Features/ Firmware filtering concept)

Before AD converter:
Hardware low pass -3 dB @ 330 Hz
type Butterworth 2nd order

Within ADC after conversion:

Low pass: -3 dB @ 10.9 kHz

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-wire

Sampling rate (per channel)

1 ms/ 1 ksps

Free down sampling by Firmware via decimation factor

Oversampling

1…25 selectable

Supported EtherCAT cycle time

(depending on the operation mode)

DistributedClocks:
min. 200 μs + n · 25 μs (n = 0, 1, 2, ..); max. 10 ms

FrameTriggered/Synchron:
min. 200 μs + n · 25 μs (n = 0, 1, 2, ..); max. 100 ms

FreeRun: not yet supported

Connection diagnosis

Wire break

Internal power supply

Via E-bus

Current consumption E-bus

typ. 220 mA

typ. 260 mA

Current consumption power contacts

-

Thermal power dissipation

typ. 2 W

Dielectric strength - destruction limit

max. permitted short-term/permanent voltage between the contact points: ±30 V

Recommended operation voltage range to compliance with specification

max. permitted voltage at +Input, −Input, related to the internal analog ground (AGND) (“operation as intended“):

±12.5 V

Distributed Clocks

Yes, with Oversampling n = 1…25, accuracy << 1 μs

Special features

AGND (of the ELM334x-0000) leaded through, common mode measurement, 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

ELM3344‑0000 / ELM3348‑0000:
6‑pin push-in cage clamp, service plug

ELM3344‑0003 / ELM3348‑0003:
Mini-thermocouple-socket universal

Dimensions (W x H x D)

See chapter Housing

Mounting

on 35 mm rail conforms to EN 60715

Note mounting

ELM334x-0000: plug within scope of delivery,
see chapter Notes on connection technology/
Connection design Push-In with service plug

ELM334x-0003: plug not within scope of delivery,
see chapter Notes on connection technology/
Connection design Mini thermocouple

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

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 into the Up supply (power contact) at set connection “Connect Up- to GNDA“ or “Connect Up- to AGND“ within CoE (F800:01) can lead to measurement deviations up to ±FSV.