Technical data

Analog inputs

EJ3318

Number of inputs

8 x TC
2 x PT1000 for cold junction compensation

Temperature measurement (thermocouple)

Type B, C, E, J, K, L, N, R, S, T, U (pre-set type K), mV measurement

Connection technology

2-wire

Maximum cable length to the sensor

30 m (see note)

Temperature range

Defined in the range for each sensor (Pre-set: type K; -200 ... +1370°C); voltage measurement ±30 mV ... ±75 mV

Lower limit of -454°F (-270°C) for type K, T thermocouples

Resolution

0.01°C/ digit (selectable, default: 0.1°C)

Input filter limit frequency

Typ. 1 kHz; depending on sensor length, conversion time, sensor type

Conversion time

approx. 5 s up to 40 ms, depending on configuration and filter setting, pre-set approx. 500 ms

Wire break detection

yes

Special features

Idle detection, error detection of external cold junction compensation (CJC)

Voltage measurement

EJ3318

Measuring range, technically available

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, note technically available 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

at ±75 mV, 23°C ambient temperature: < ±0.096% (relative to the full scale value):
for further information, see chapter "Measurement ±30 mV, ±60 mV, ±75 mV"

Temperature measurement

EJ3318

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 (pre-set)
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, pre-set 0.1°C

Notice Internally, the full scale value is calculated with 16 bits, so depending on the thermocouple set, there may be value jumps >0.01°C at “Resolution 0.01°C”; type K: approx. 0.04°C.

Measurement uncertainty

at 23°C ambient temperature, with reference configuration, according to type:
B: ±6.3°C;
C: ±4.9°C;
E: ±3.1°C;
J: ±3.2°C;
K: ±3.0°C;
L: ±3.1°C;
N: ±3.4°C;
R: ±5.2°C;
S: ±5.4°C;
T: ±3.3°C;
U: ±3.2°C
for further details see Chapter "Measurement of thermocouples"

Supply and potentials

EJ3318

Current consumption load voltage (Up contacts)

-

Power supply

via the E-bus

Current consumption via E-bus

190 mA

Electrical isolation

500 V (E-bus/signal voltage)

Communication

EJ3318

Distributed clocks

-

Environmental conditions

EJ3318

Permissible ambient temperature range during operation

-25°C … +60°C (extended temperature range)

Permissible ambient temperature range during storage

-40°C ... +85°C

Permissible relative air humidity

95%, no condensation

Operating altitude

max. 2,000 m

General data

EJ3318

Dimensions (W x H x D)

approx. 12 mm x 66 mm x 55 mm

Weight

approx. 30 g

Installation

on signal distribution board

Pollution degree

2

Installation position

Standard

Position of the coding pins

2 and 7

Color coding

green

Standards and approvals

EJ3318

Vibration/shock resistance

conforms to EN 60068-2-6 /EN 60068-2-27 (with corresponding signal distribution board)

EMC immunity/emission

conforms to EN 61000-6-2 /EN 61000-6-4 (with corresponding signal distribution board)

Protection rating

EJ module: IP20
EJ system: dependent on the signal distribution board and housing

Approvals/markings*

CE, EAC, UKCA,
UL

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

Technical data 1:

CE approval

The CE Marking refers to the EtherCAT plug‑in module mentioned above.
If the EtherCAT plug-in module is used in the production of a ready-to-use end product (PCB in conjunction with a housing), the manufacturer of the end product must check compliance of the overall system with relevant directives and CE certification.
To operate the EtherCAT plug‑in modules, they must be installed in a housing.

Technical data 2:

Maximum cable length to the sensor

Without additional protective measures, the maximum cable length from the EtherCAT Module to the sensor is 30 m. For longer cable lengths, suitable surge protection should be provided.