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4 Wiring
30
9.5
Disposal
The device contains electronic components and when being disposed of should be placed in the
electronic waste. Please take note of any local waste disposal legislation when disposing of the
device.
10
Technical Data
10.1
Function and system design
Equipment architecture
The TA20J allows the local visualization in engineering units the 4...20 mA current value. The opti-
onal 2-wire LCD digital display is usually connected in series with a 2-wire temperature "head-
mounted" transmitter and both installed into the stainless steel housing. The TA20J can be used as
a connection head for temperature RTD or TC sensors, or as a junction housing in a remote appli-
cation.
Housing
The TA20J is a stainless steel housing (AISI 316L or DIN 1.4404) with a high protection grade
IP66/IP67, suitable for temperature measurement applications. The TA20J is suitable to host any
temperature transmitter of the iTEMP
loop powered 4-digit LCD indicator. Available in blind or window version, the TA20J housing can
be mounted on a pipe or on a wall by means of special brackets or on the top of a temperature sensor
of the series Omnigrad M. The TA20J is suitable to fullfil all hygienic requirements of the food and
pharmaceutical industries, and is supplied with different electrical connections: M20 x 1.5 mm,
PROFIBUS PA
connector, ½" NPT+ skintop, etc.
®
Display
The LCD display uses a "series" connection to the 4...20 mA 2-wire loop and is powered through
a little voltage drop. By means of 3 little keys (see figure 4) it's possible to modify the configuration:
zero and span, decimal point, filter on the reading, measurement resolution and selection of the
over-range functionality. Through the same 3 keys it is possible to execute the calibration of the
A/D converter. All configuration parameters are stored in a non-volatile EEPROM. The display is
designed to be mounted in the TA20J stainless steel, window based housing by means of three
screws on the top cover. The loop powered 4-digit LCD indicator allows to display the temperature
measurement directly in engineering units (°C or °F).
EMC according to EN50081-1 and EN50082-2.
®
family TMT18x (analog, HART
TA20J
®
, PROFIBUS PA
®
) and/or a
Endress+Hauser
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