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2-wire temperature transmitter 620S
for Pt100 sensors
• Input range -200...+700°C
• High accuracy ±0.05 % of span
• Leadwire compensation up to 100 ohms
• Linearization
• Small case 22.5 mm
• Mounting on DIN-rail
Our model 620S temperature transmitter is designed to
meet the most exacting temperature measuring requirements. Extreme accuracy is obtained by linearizing the
measurement signal with an accuracy of 0.05 % to the
temperature. Thus one transmitter can now replace
several of narrower range without reducing accuracy.
Leadwire resistance automatic compensation up to 50
Specifications:
Input Pt100 according to
DIN 43760
Accuracy ±0.05 % of span
Linearizing accuracy ±0.05 % of span
Ambient temperature effect
- Span <100°C ±0.01 %/°C
- Span >100°C ±0.005 %/°C
Supply voltage effect ±0.005 %/V
Repeatability 0.05 %
Response time 0.25 s
External leadwire
resistance effect ±0.002 %/ohm typical
max. 50 ohm / wire
Supply voltage range 12..40 VDC, reverse
polarity protected
Output 4..20 mA
Min. output 3.8 mA
Current limitation 27 mA
Sensor current 0.7 mA
Operating temperature 0..55 °C
Storage temperature -10..+70 °C
Wall and DIN 46277 rail mountings
Terminal board for 2 x 1.5 mm²
ohms makes possible long transfer distances with smallcrossarea signel cables. Range can easily be varied by
changing the range resistors located under the front plate.
Normally transmitters are delivered calibrated according
to customer range requirements.
Module width 22.5 mm
Housing polycarbonate, IP10
Weight 200 g
Temperature range -200..+800°C
Min. span 50°C
Max. span 800°C
How to order
Model 620S - Pt100 - 0 / 200
Sensor
Output 4 mA (°C)
Output 20 mA (°C)
For example, range 0-100°C, type 620S-Pt100-0/100
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Connection diagram
Model 620S
3-wire input
3
2
1
Pt100
2-wire input
3
2
1
Max. loop resistance RL
+V -12
RL=
Power supply
12..40 VDC
- +
6
5
4
6
5
4
RL
Dimensions
RL
ohm
1400
1200
1000
700
600
400
300
0
12 18 20 24 26 32 36 40
Power supply VDC
0.02
(ohm)
Difference measurement (special order)
3
2
1
6
5
4
Potentiometer (special order)
3
2
1
6
5
4
99
82
22.5
Connectors 2 x 2.5 mm
Mounting DIN 46277
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