ELM324x - Technical data

Analog inputs

4 channels

6 channels

Time relation between channels

Consecutive conversion of all channels in the terminal (multiplex)

Timestamp per channel, typ. sampling offset related to channel 1:

synchronous conversion between terminals when DistributedClocks is used.

Ch.1: 0 μs
Ch.2: +100 μs
Ch.3: +200 μs
Ch.4: +300 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

ADC conversion method

ΔΣ (delta-sigma) with internal sampling rate

8 Msps

8 Msps

Input filter limit frequency for hardware
(see explanations in chapter

ELM features/firmware filter concept)

Before AD converter:
hardware low-pass -3 dB @ 30 kHz,
type: Butterworth 2nd order

Within ADC after conversion: low-pass
-3 dB @ 11.09 kHz

Type sinc3/average filter

The rise 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-wire

Sampling rate (per channel)

1 ms / 1 ksps

Free down sampling by firmware via decimation factor

Oversampling

1...20 can be selected

Supported EtherCAT cycle time

(dependent on operation mode)

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

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

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

Internal resistance

> 10 MΩ (sense against each other)

Resistance measurement application range ³⁾

4-wire connection: 0 … 50 Ω

2/3/4-wire connection: 0 … 200 Ω, 0 … 500 Ω, 0 … 2 kΩ, 0 … 5 kΩ

Temperature application range (RTD) ³⁾

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

2/3/4-wire connection

Connection diagnosis

Wire break/short circuit

Internal analog ground AGND

Not accessible

Overvoltage protection of the inputs related to AGND

Not applicable, AGND is not accessible

Internal power supply

Via E-bus

Current consumption via E-bus

Typ. 400 mA

Typ. 450 mA

Current consumption of power contacts

-

Thermal power loss

Typ. 2 W

Typ. 2.5 W

Dielectric strength – destruction limit

Max. permitted short-term/continuous voltage between the contact points: ±36 V

Recommended operating voltage range for compliance with specification

Terminal supplies loads itself, do not feed in external power

Distributed clocks

Yes, with oversampling, 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 PushIn spring-loaded system, 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 to 2000 m (derating at higher altitudes on request)

Relative humidity

Max. 95 %, no condensation

Protection rating

IP20

Installation position

variable

Vibration/shock resistance

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

EMC immunity/emission

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

Approvals/markings *⁾

CE

EMC notes

In case of the "PushIn" connector, 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.