Mantracourt Electronics Limited
LVDT/A & LVDT/D User Manual
4
Chapter 3 Analogue Outputs
Two analogue outputs are available from the LVDT, DC current and DC voltage. The ranges offered are as follows:-
Output
Range
DC voltage
±10 V
±5 V
NB:
Maximum Load on voltage ranges is 2 mA. Bi-polar input, -F.S.
to +F.S.
0 – 10 V
0 - 5 V
DC current
0 – 20 mA
NB:
Maximum impedance 500 R. Uni-polar input, zero to +F.S.
4 – 20 m
The analogue output options are summarised below,
NB. Full scale output for the voltage ranges is achieved with a bi-polar ( ± ) input.
Output Connections
In
‘Sink’
mode the +ve end of the load is connected to the in15V supply on the LVDT and the -ve end is
connected to the LVDT output. The current through the load is ‘sunk’ by the LVDT towards ground (0V).
N.B. In this mode neither connection to the output load is electrically common to the load cell.
Select this option by fitting the two jumpers in the positions next to the span trimmer (See Output Current Mode
Settings – Jumpers JP1 & JP2)
In
‘Source’
mode the +ve end of the load is connected to the LVDT output and the current is ‘sourced’ by the LVDT
output through the load towards ground (0V).
This mode has the advantage that the negative output connection is common to the load cell
‘- Excitation’ terminal.
Select this option by fitting the two jumpers in the positions furthest from the span trimmer (See Output Current
Mode Settings – Jumpers JP1 & JP2)
