SHINKAWA VM-21D 6-WIRE LVDT SIGNAL CONDITIONER
VM-21D
6-WIRE LVDT SIGNAL CONDITIONER
Input LVDT LF Series
Measuring Range See Model Code above
Output (isolated) 1 to 5VDC (output resistance: 250Ω) or 4 to 20mADC (permissible load resistance: 600Ω or less)
I/O Conversion Accuracy
±1.5% of F.S. at 25°C, ±3% of F.S. at 0 to 50°C
Deviation from an ideal linear output of voltage or current in combination with LF Series LVDT.
However, when measuring range and full range of input LVDT are the same.
Response Speed =45ms, 90% response
Burn-down Function
*1 Detects transducer failure and causes the 4 to 20mADC (1 to 5VDC) output to go to less than
0.8mADC (0.2VDC).
T.P. Output (test point
output for confirmation
null point)
Output 0V when core position is on Null point.
Output impedance: 1kΩ
Output for LVDT Excitation Voltage: 7Vrms, Frequency: 1kHz, Max. current : 35mA, Sine wave
Supply Permissible Voltage 24VDC±10% or 85 to 264VAC/DC (50/60Hz)
Power Consumption 24VDC: 6.0W, 100-240VDC: 6.0W, 100-240VAC: 10VA
Insulation Resistance 100 MΩ minimum at 500VDC between input-output-power-GND mutually.
Withstanding Voltage 2000VAC for one minute between input-output-power-GND mutually.
(With VM-21H: 1,000VAC between output-GND.)
Operating Temperature 0 to 50°C (32 to 122°F REF.)
Relative Humidity 10 to 90%RH (no condensation)
Casing Material (color) Modified polyphenylene oxide (black)
Weight Approx. 110g (0.24lb)
CE Marking Only as for 24VDC power supply specifications.
Abnormal condition
• When there is an abnormality in the LVDT or signal cable (breaking in LVDT wiring, breaking or short circuit in signal cable).
However, there may be some instances where these conditions will not be detected.
• When there is an abnormality in LVDT excitation output (oscillation has stopped).
Power supply Measuring range Input LVDT Full range of
input LVDT Output Conditioner socket
1 24VDC 21 50mm F LF Series 100 100mm 1 1 to 5VDC 0 Without
2 100 to 240VAC/DC 23 100mm 250 250mm 2 4 to 20mADC 1 Include
24 150mm 300 300mm
25 200mm 400 400mm
26 250mm
27 300mm
30 400mm