ELM3702-0101 - Technical data

Analog inputs

2 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 (deltaSigma) with internal sample rate

8 Msps

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

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

Within AD-converter to of the transformation:
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 (incl. sign)

Connection technology

2/3/4/5/6-wire

Sampling rate (per channel, simultaneous)

Within mode TC CJC RTD (thermocouple with RTD cold junction): 500 Sps

In all other modes 100 µs/10 ksps (each channel, fixed setting)

Free down sampling by Firmware via decimation factor

Oversampling

1…100 selectable (max. 10 ksps)

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

Input impedance
(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,

2-wire-connection

Operation range current measurement

±20 mA, 0/4…20 mA, NAMUR NE43,

2-wire-connection

Operation range SG, measuring bridge

Full bridge

Full bridge (±2/4/8/32 mV/V),

4/6-wire-connection,

Bridge supply adjustable,

120 … 5000 Ω possible

Half bridge

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

3/5-wire-connection

Bridge supply adjustable,

120 … 5000 Ω possible

Quarter bridge

Quarter bridge 120 Ω ,350 Ω and 1000 Ω (±2/4/8/32 mV/V), internal switched bridge extension,

2/3-wire-connection,

Bridge supply adjustable

Operation range IEPE

Measuring ranges ±2.5/5/10 V adjustable,

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

Acquisition of the modulated alternating voltage,

AC/DC coupling (parameterizable high pass),

2-wire-connection

Operation range potentiometer

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

3/5-wire-connection

Operation range resistance measurement

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

Fixed set supply voltage 2.5 V at 5 kΩ, 2 kΩ; 4.5V at 500 Ω, 200 Ω, 50 Ω; internal reference resistance 5 kΩ

2/3/4-wire-connection

Operation range temperature (RTD)

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, div. KT/KTY (types see documentation),

2/3/4-wire-connection

Operation range temperature (thermocouple)

Typ A, Au/Pd, B, C, D, E, G, J, K, L, N, PLII, Pt/Pd, R, S, T, U cold junction measurement: internal (terminal), internal (connection) and external

2-wire-connection

Connection diagnosis

Wire break/short cut

Internal analog ground AGND

Existing by external connection to -Uv

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

tbd.

Internal power supply

via E-bus

Current consumption E-bus

typ. 580 mA

Current consumption power contacts

-

Thermal power dissipation

typ. 3 W

Dielectric strength – destruction limit
(absolute maximum)

Maximum permitted voltage between +/- Input1 and –Uv (each channel)

±35 V

Maximum permitted voltage between +/- Input2 and –Uv (each channel)

±35 V

Recommended operation voltage range to compliance with specification
(operation mode normal)

Maximum permitted voltage between +/- Input1 and –Uv (each channel)

±33 V within ±60 V measuring range

±10 V in all other measurement ranges

Maximum permitted voltage between +/- Input2 and –Uv (each channel)

±5 V

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⁾

Functional insulation, 707 V DC (type test)

Electrical isolation channel/E-bus ²⁾

Functional insulation, 707 V DC (type test)

Electrical isolation channel/GND 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

LEMO 1B 308 8-pin

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

Installation position

Variable

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