EJ3318 - 8-channel thermocouple input with open-circuit recognition

EJ3318 - Technical data

Technical data
Number of inputs
8 x TC
2 x PT1000 for cold junction compensation
Power supply
via the E-bus
Thermocouple sensor types
types J, K, L, B, E, N, R, S, T, U (default setting type K), mV measurement
Distributed Clocks
Maximum cable length to the sensor
30 m (see note)
Input filter limit frequency
typ. 1 kHz; depending on sensor length, conversion time, sensor type
Connection technology
Open-circuit recognition
Conversion time
approx. 5 s up to 40 ms, depending on configuration and filter setting, preset approx. 500 ms
Temperature range
defined in the range for each sensor (preset: type K; -200..+1370 °C); voltage measurement ±30 mV..±75 mV
0.1 °C/ digit
Measuring error
< ±0.3 % (relative to full scale value FSV)
Open-circuit recognition
Electrical isolation
500 V (E-bus/signal voltage)
Current consumption load voltage (Up contacts)
Current consumption via E-bus
190 mA
Special features
Idle detection, error detection of external cold junction compensation (CJC)
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
Dimensions (W x H x D)
approx. 12 mm x 66 mm x 55 mm
Pollution degree
approx. 30 g
on signal distribution board
Mounting position
Position of the coding pins
2 and 7
Color coding
Vibration / shock resistance
conforms to EN60068-2-6 / 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 class
EJ module: IP20
EJ system: dependent on the signal distribution board and housing
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.
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.