Mounting and wiring
EL33xx-00x0
70
Version: 4.2
4.13.5
Connection instructions for earthed/potential-free
thermocouples
Due to the differential inputs of the terminals, different connection types are recommended depending on the
type of thermocouple used. For earthed thermocouples, ground is not connected to the shielding. If the
thermocouple does not have an ground connection, the ground and shielding contacts can be connected
(see Fig.
Connection of earthed and earth-free thermocouples
and Connection instructions for
thermocouples).
Connection instructions for thermocouples
•
Earthed thermocouple
ð
Do not connect GND to the shielding
ð
For EL3312: potential difference
max. 2 V
•
Potential-free / earth-free thermocouple
ð
GND can be connected to the shielding
ð
or: GND can connected to any potential,
max. 35 V
to 0 V power
•
Non-potential-free thermocouple
ð
Do not connect GND to the shielding
ð
Do not connect GND to thermocouple potential.
ð
Thermocouple-potential
max. 35 V
to 0 V power
ð
For
different thermocouple potentials
several 1-channel EL3311 units should be used.
•
Unused inputs
ð
For the multi-channel versions EL3312 and EL3314, unused inputs should be short-circuited
(low-resistance connection of +TC, -TC)
Fig. 55: Connection methods for earthed and earth-free thermocouples
The example shows EL3312. For the EL3314, the shield should be connected to an additional shield
terminal (EL9195).
Summary of Contents for EL33-00 Series
Page 2: ......
Page 6: ...Table of contents EL33xx 00x0 6 Version 4 2...
Page 17: ...Product overview EL33xx 00x0 17 Version 4 2 Fig 10 EL3312 Fig 11 EL3314...
Page 18: ...Product overview EL33xx 00x0 18 Version 4 2 Fig 12 EL3314 0002 Fig 13 EL3314 0010...
Page 61: ...Mounting and wiring EL33xx 00x0 61 Version 4 2 Fig 45 EL3314 0010 Fig 46 EL3314 0090...
