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Universal Single- and Double-channels Transmitters to DIN Rail with HART Communication
Note. 1) The symbol ”x“ in the description of terminal represents a channel number. In case of a single-channel design this symbol
“x“ is always replaced by “1“ an in case of a double-channel design this represents the channel number, i.e. “1“ or “2“.
Note
2) Connection of the thermocouple to the compensation terminal - the compensation terminal includes a built sensor Pt100A
for measurement of temperature of the cold end. When using the compensation terminal it is
necessary
to set a compensation of
the cold end
by an external sensor Pt100
in configuration of the transmitter, i.e. by a sensor built-in in the compensation terminal!
The compensation terminal is included in the design P5335 L10 a L20 and can also be ordered independently, separately for each
channel (code CTB, see the ordering table).
Note 3) This connection can be used
only
for measurement of a thermocouple with constant temperature of the cold end.
Note 4) This connection can be used
only
for measurement of differences of averages of temperatures of thermocouples with
constant temperature of the cold end.
4.2 Measurement of thermocouple temperature
sensors using transmitter P5335 Lxx for a DIN
rail
In configuration of the transmitter P5335 Lxx the thermocouple
sensors cannot be measured using internal compensation of
the cold end! P5335 Lxx includes a built-in transmitter with
terminals and this transmitter would measure temperature
of its own terminals that may differ quite considerably from
temperature of terminals of the box on the DIN rail.
The following types of compensation of the cold end can be
used in case of the transmitter P5335 Lxx:
• compensation by a constant temperature
• compensation by an external sensor
The external compensation sensor measures temperature of
the joint where the extension or compensation line changes
to a copper line. This change may be located directly in the
transmitter terminal, if the extension or compensation line is
brought up to the transmitter terminals, or in a remote terminal
box that is connected with the transmitter using a copper line.
In both cases it is necessary to install the compensation sensor
so that it measures temperature of the joint in point of change
of the extension or compensation line into the copper line.
• using a compensation terminal
In this case there may be assumed that the extension or
compensation line is connected directly to the compensation
terminal of the transmitter (code CTB, see the ordering table).
The compensation terminal includes a built-in sensor Pt100A
that measures temperature of transition of the extension or
compensation line into copper line.
When using the compensation terminal, it
is necessary
to set
compensation of the cold end in configuration of the transmitter
by an
external sensor Pt100
, i.e. by the sensor built-in in the
compensation terminal!
Compensation terminal for measurement
of thermocouple temperature sensors
It is a threaded removable terminal that is designed for
direct connection o an extension of compensation line. The
compensation terminal includes a built-in sensor Pt100A that
measures temperature of the terminal, i.e. temperature of
transition of the extension or compensation line to a copper
line.
The terminal cannot be used for connection of a resistance
sensor neither for connection of two thermocouples.
When using a compensation terminal it
is necessary
to set
compensation of the cold end in configuration of the transmitter
by an
external sensor Pt100
, i.e. by the sensor built-in in the
compensation terminal!
The compensation terminal is included in the design P5335 L10
and L20 and can also be ordered independently, separately for
each channel (code CTB, see the ordering table).
Power
supply
HART Modem /
/ Configurator
R
L
≥
250 Ohm
mA
x3
x6
x4 x5
x1
x2
x3
x6
x4 x5
3W
4W
4W
CJC
CJC
x4 x5
x3
x6
x4 x5
x3
x6
x4 x5
x3
x6
x4 x5
x3
x6
x4 x5
1
2
1
2
1
2
x3
x6
x4 x5
x3
x6
x4 x5
3W
4W
4W
U
x3
x6
x4 x5
U
2
U
1
RTD
Output:
Input:
Resistance
TC, CJC
compensation
terminal
(Note 2)
TC, external CJC
TC, const.CJC
(Note 3)
Voltage, difference
or average
TC, difference
or average ,
const.CJC
(Note 4)
TC, difference
or average ,
external CJC
RTD, difference
or average
Voltage
Output, 1.channel
(terminals 11,12)
Output, 2.channel
(terminals 21,22)
Input, 1.channel
(terminals 13,14,15,16)
Input, 2.channel
(terminals 23,24,25,26)
Note 1
