Datasheet

3.10.12
Intelligent interface modules
MTW 12,4 MTW 12,4
2- 3-wire 4-wire
Ordering data Art.-No. Art.-No.
INPUT spring clamp/screw terminals spring clamp/screw terminals
±50°C 6644330 6644340
– 50…150 °C 6644331 6644341
0…100 °C 6644332 6644342
0…150 °C 6644333 6644343
0…200 °C 6644334 6644344
0…300 °C 6644335 6644345
0…600 °C 6644336 6644346
Technical data
Supply voltage range 18…30 V DC, smoothed
Supply current max. 80 mA
Cable resistance (without PT100) for 3- and 4-wire technology max. 100 Ohm
Output signals at 0…10 V DC max. 25 mA, overload protected
at 4…20 mA max. 500 Ohm
at 0…20 mA max. 500 Ohm
Tolerance ± 1 % from end value
Temperature range 0…+60 °C
Mounting method DIN-rail mounting to EN 50022
Dimensions H x W x D 90 x 12.4 x 65 mm
Description
The Murrelektronik temperature converter module works in conjunction with a temperature sensor PT100 (IEC 751/EN 60751) and converts the output
from the sensor into a standard signal format of (0…10 V, 0…20 mA or 4…20 mA).
The MTW module supplies a constant current to the PT100 resistor across, which develops a variable voltage.
This will be measured, linearized and converted to the output signal at the OUT terminals.
All three signals can be used at the same time.
The 2-wire technology allows short distances between the MTW and the PT100 sensor to be covered, i.e. <5 m. For longer distances, 3-wire technology
compensates for the cable resistance. For three wire technology, remove the bridge between 2 and 3. For the greatest accuracy, 4-wire technology
compensates for both the outgoing and incoming cables which may have differing resistances or lengths.
Notes
To order screw terminal option omit 66 from the part number.
1)
0°…100°C to 0…10 V DC or 4…20 mA with 0.1 % precision on Art.-No. 446098 approx.. 446099 on request.
Circuit diagram
Temperature modules
for PT 100 Sensors
Input
ϑ
Output
PT 100
+24 V
I
1
I
2
GND
GND
U
+24 V
I
1
I
2
GND
GND
U
ϑ
U
E3
E1
E2
Input
ϑ
Output
PT 100
ϑ
U,I
E4
E1
E2
E3