WIKA T24 - Handbuch (Seite 16)

GB
16 WIKA operating instructions temperature transmitter, model T24
2370242.09 08/2013 GB/D
6.2.1 Power supply / 4 ... 20 mA-loop
The T24 is a 2-wire temperature transmitter and depending on the
version, it can be supplied with various types of power supply. Connect
the positive pole of the power supply to the terminal marked with ⊕
and the negative pole of the power supply to the terminal marked with
⊖. With flexible leads we recommend the use of crimped connector
sleeves.
The T24 temperature transmitter requires a minimum terminal voltage
of DC 10 V. The load must not be too high as, otherwise, in the case of
relatively high currents, the terminal voltage at the transmitter will be
too low.
Maximum permissible load depending on the supply voltage:
Load diagram
Load R
A
en Ω
Voltage U
B
en V
Ex ia Ex nL/nA/ic
6.2.2 Connecting the sensor
The connection of a resistance thermometer (e.g. per ICE 60751 or
similar) into a 2-, 3- or 4-wire sensor connection. The sensor input of the
transmitter has to be configured in accordance with the actually used
sensor connection type, otherwise a complete use of the possibilities of
connection compensation is not possible; furthermore this may cause
additional measuring errors (see chapter 6.3 “Configuration”).
6. Commissioning, operation