ELM354x - 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 (multiplex), synchronous conversion between terminals, if DistributedClocks will be used. Timestamp each channel, typ. sampling offset related to channel 1:

Ch.1: 0 ms
Ch.2: + 200 µs (tbd.)

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

ADC conversion method

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

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

Before AD converter:
hardware low pass -3dB @ 380 Hz (16544 kHz for quarter bridge in 4‑wire connection) (tbd.)
type butterworth 1th order

Within ADC after conversion:
low pass -3dB @ 2.75 kHz (tbd.)
type sinc5/average filter or sinc3 (tbd.)

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

2/3/4/5/6/7 -wire

2/3/4/5/6 -wire

Sampling rate (per channel, multiplex)

1 ms/1 ksps

Free down sampling by Firmware via decimation factor, possible effective sampling interval each channel: 1 ms + n ⋅ 25 μs (tbd.)

Oversampling

1…20 selectable

Supported EtherCAT cycle time

(depending on the operation mode)

DistributedClocks: min. 100 µs, max. 10 ms (tbd.)

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

FreeRun: not yet supported

Operation range SG

Quarter bridge (1 kΩ, 350 Ω, 120 Ω) with internal bridge extension,
half bridge, full bridge, voltage measurement, resistance measurement (tbd.)

Connection diagnosis

preliminary data/ provided is:

Channel-by-channel open-circuit detection of the connection cables (running operation or triggered diagnosis, up to 6‑wires)

Channel by channel short-circuit detection of all lines among each other (triggered diagnosis, up to 6 lines)

Additional process data and diagnostic evaluation of the connected sensor via TEDS interface

Internal analog ground AGND

Existing by external connection to -Uv

Overvoltage protection of the inputs related on ‑Uv (internal ground)

value to follow

Internal power supply

via E-bus

Current consumption E-bus

typ. 85 mA tbd.

Current consumption power contacts

60 mA typ. + load, in total, max. 150 mA typ.

70 mA typ. + load, in total, max. 240 mA typ.

Thermal power dissipation

typ. 3 W

Dielectric strength - destruction limit

Max. permitted short-term/continuous voltage between each contact point ±I1, ±I2, +Uv and –Uv: non-supplied ±30V (tbd.) supplied ±30V (tbd.)

Note: -Uv corresponds to internal AGND

Recommended operation voltage range to compliance with specification

value to follow

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

Bridge feeding-in supply-voltage free adjustable 1.5 V – 12 V (electronic overload protection per channel 120 mA)

2-wire TEDS-Interface (IEEE 1451.4 Class 2 MMI, Multiplex-operation)

externe Shunt-calibration possible

Bridge feeding-in supply-voltage free adjustable 1.5 V – 12 V (electronic overload protection per channel 65 mA)

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

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

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.