General technical data

Analog inputs

EL3318

Number of inputs

8

Thermocouple sensor types, measured variables

Types B, C, E, J, K, L, N, R, S, T, U (default setting type K), mV measurement

Connection technology

2-wire

Maximum cable length to the thermocouple

30 m (without protective measures), suitable surge protection must be provided for longer cable lengths

Resolution

internal 16-bit

Sampling type

multiplex

Ground reference

differential

Conversion time

approx. 2.5 s to 20 ms,
depending on the configuration and filter setting; default: approx. 250 ms

Input filter cut-off frequency

1 kHz typ.

Software filter

5 Hz... 30 kHz, adjustable, notch characteristic; preset: disabled

Open-circuit recognition

yes (can be disabled)

Supports NoCoEStorage

yes, from firmware 01

Voltage measurement

EL3318

Measuring range, technically usable

approx. ± 78 mV

Measuring ranges (nominal) and resolution

± 30 mV (1 µV per digit, thus max. 32.768 mV can be displayed)

± 60 mV (2 µV per digit, thus max. 65.536 mV can be displayed)

± 75 mV (4 µV per digit, thus max. 131 mV can be displayed, observe technical measuring range)

The measuring ranges 30 and 60 mV are executed in software to increase the resolution and always use the same electrical measuring range of ± 75 mV.

Measurement uncertainty

See Measurement ±30 mV...±75 mV

Temperature measurement

EL3318

Electrical measuring range used

± 75 mV

Measuring ranges

Type B: +200...+1820°C

Type C: 0...+2320°C

Type E: -100...+1000°C

Type J: -100...+1200°C

Type K: -270…+1370°C (preset)

Type L: 0...+900°C

Type N: -100…+1300°C

Type R: -50...+1767°C

Type S: -50...+1760°C

Type T: -200…+400°C

Type U: 0...+600°C

Resolution

Temperature display 0.1/0.01°C per digit, preset 0.1°C

Note: internally, 16 bits are used for the calculation up to the FSV; depending on the set thermocouple, therefore, jumps in value > 0.01°C occur with "resolution 0.01°C"; e.g. type K: approx. 0.04°C

Measurement uncertainty

See Thermocouples measurement

Supply and potentials

EL3318

Power supply for the electronics

via the E-bus

Current consumption via E-bus

typ. 210 mA

Differential voltage between +TC and -TC

Recommended area of application

respective measuring range

Destruction limit, short-term/continuous

±15 V

Max. potential of the twisted TC ends to one another

(non-isolated/grounded TC)

Recommended area of application

±2 V

Destruction limit, short-term/continuous

±15 V

Max. potential UCM (CommonMode voltage) of the twisted TC to GND

Recommended area of application

Not applicable because GND is not accessible

Destruction limit, short-term/continuous

Max. potential of twisted TC or GND to SGND or 0 V power

Recommended area of application

±30 V

Destruction limit, short-term/continuous

±50 V

Electrical isolation: Max. potential of twisted TC or GND to bus side

Recommended area of application and short-term/continuous destruction limit

500 V

Communication

EL3318

Configuration

via TwinCAT System Manager

Width in the process image

max. 16 bytes input,
max. 8 bytes output

Distributed Clocks

-

Environmental conditions

EL3318

Permissible ambient temperature range during operation

-25°C... +60°C (extended temperature range), from firmware 06

Permissible ambient temperature range during storage

-40°C … +85°C

Permissible relative air humidity

95%, no condensation

General data

EL3318

Dimensions (W x H x D)

approx. 15 mm x 100 mm x 70 mm (width aligned: 12 mm)

Weight

approx. 60 g

Mounting and wiring

on 35 mm support rail according to EN 60715

Installation position

variable

Standards and approvals

EL3318

Protection class

IP20

Vibration / shock resistance

conforms to EN 60068-2-6 / EN 60068-2-27,
see also Installation instructions for enhanced mechanical load capacity

EMC immunity / emission

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

Marking / Approval*)

CE, UKCA, EAC
ATEX, IECEx, cFMus, cULus

*) Real applicable approvals/markings see type plate on the side (product marking).

Ex markings

Standard

Marking

ATEX

II 3 G Ex nA IIC T4 Gc

IECEx

Ex nA IIC T4 Gc

cFMus

Class I, Division 2, Groups A, B, C, D
Class I, Zone 2, AEx/Ex ec IIC T4 Gc

Extended features

EL3318

Pluggable connection level

-

Electrical isolation

-

TwinSAFE SC

-

Calibration certificate

-