Beckhoff EJ3318 EtherCAT plug-in module

Beckhoff EJ3318 EtherCAT plug-in module

The EJ3318 EtherCAT plug-in module allows the direct connection of eight thermocouples and is therefore particularly well suited to compact applications on the signal distribution board. The module's circuit can operate thermocouple sensors using the 2-wire technique. A microprocessor handles linearization across the whole temperature range, which is freely selectable. The error LEDs indicate a broken wire. The compensation for the cold junction is done by two RTDs (Pt1000), which can be placed anywhere on the signal distribution board. The EJ3318 can also be used for mV measurements.

Technical data:EJ3318

Connection method:2-wire

Number of inputs:8 x TC, 2 x Pt1000 (compensation for the cold junction)

Measuring range:in the range defined in each case for the sensor (default setting: type K; ?200…+1370°C);

mV measurement: ±30 mV…±75 mV

Power supply:via the E-bus

Auxiliary power current:–

Technology:temperature measurement (TC)

Distributed clocks:–

Input filter limit frequency:typ. 1 kHz; depending on sensor length, conversion time, sensor type

Sensor types:thermocouples type K, J, L, E, T, N, U, B, R, S, C (default setting type K), mV measurement

Wiring fail indication:yes

Conversion time:approx. 5 s up to 40 ms, depending on configuration and filter setting, default: approx. 500 ms

Resolution:0.1°C per digit

Measurement error/uncertainty:< ±0.3% (relative to full scale value)

Electrical isolation:500 V (E-bus/field potential)

Current consumption E-bus:190 mA

Special features:open-circuit recognition, error recognition of the external cold junction compensation (CJC)

Weight:approx. 30 g

Operating/storage temperature:-25…+60°C/-40…+85°C

Relative humidity:95%, no condensation

EMC immunity/emission:conforms to EN 61000-6-2/EN 61000-6-4

Vibration/shock resistance:conforms to EN 60068-2-6/EN 60068-2-27

Protect. rating/installation pos.:IP20/see documentation

Approvals/markings:CE, UL

Housing data Beckhoff EJ3318 EtherCAT plug-in module

Design form:EtherCAT I/O plug-in module

Material:polycarbonate

Installation:on signal distribution board

Mechanical coding:EJ plug-in module: signal-specific coding pins on the housing,

signal distribution board: holes in the printed circuit board

Locking:latching lug in circuit board cut-out

Connection method:field wiring: application-specific wiring level on the signal distribution board,

EJ plug-in module: 2 x 20-pin socket strip

Dimensions (W x H x D):12 mm x 66 mm x 55 mm