Siemens LOGO!, Manual

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Technical data
A.12 Technical data: LOGO! AM2 RTD
LOGO!
340
Manual, 04/2011, A5E03556174-01
A.12 Technical data: LOGO! AM2 RTD
LOGO! AM2 RTD
Power supply
Input voltage
12/24 V DC
Permissible range 10.8 ... 28.8 V DC
Power consumption 30 ... 40 mA
Voltage failure buffering typ. 5 ms
Power loss at
• 12 V
•
24 V
• 0.36 ... 0.48 W
•
0.72 ... 0.96 W
Electrical isolation No
Reverse polarity protection Yes
Ground terminal for connecting ground and shielding of the measuring
line
Sensor inputs
Number
2
Type PT100 or PT1000 with the default temperature
coefficient of α = 0.003850 for both types, or
compatible sensors
Connection of sensors
• 2-wire technique
•
3-wire technique
• Yes
•
Yes
Measurement range -50 °C... +200 °C
-58 °F ... +392 °F
Settings for the measurement display on
the LOGO! Basic:
•
1 °C steps
• 0.25 °C steps
(rounded to one decimal)
•
1 °F steps
• 0.25 °F steps
(rounded to one decimal)
•
Offset: -50, Gain: 0.25
• Offset: -500, Gain: 2.50
• Offset: -58, Gain: 0.45
•
Offset: -580, Gain: 4.50
Curve linearization No
Measuring current Ic Pulse current signal:
PT100: 1.141 mA (cycle time = 2.3 ms)
PT1000: 0.5 mA (cycle time = 2.3 ms)
Measurement rate depends on the installation
typical: 50 ms
Resolution 0.25 °C
Error limits
•
0 °C ... +200 °C
•
-50 °C ... 0 °C
of the final measured value:
•
± 2 °C
•
± 3 °C
Electrical isolation No