Signal Converters

D.C. & Magnetostrictive Transducer Interface Board


oem-boardThe Interface Board is designed to enable a Magnetostrictive Transducer to be used with any control that requires the equivalent of an encoder input. This board accepts a DC voltage input and converts it into both a parallel and incremental encoder output. Also included on the board are four comparators with isolated relay drivers which may be set to operate at any point in the DC input range.

The input voltage may be set at either 0 to +10 Volts or -10 to +10 Volts. The relay drivers have current sinking outputs and may be individually set to be energized on either high or low input voltage.

The board uses a voltage following technique which enables limits to be set on the maximum output pulse rate.

An eight bit rate multiplier is included which may be used to scale the incremental output to give the desired number of pulses per volt.


Board Size 5×5 Inches
Power Requirements +/-15 Volts at 50 mA.
+5 Volts at 200 ma.
Input Impedance 100k Ohm
Parallel Output 16 Bit binary. The resolution is factory adjustable
Parallel Connector 34 Pin Ribbon Header.
Incremental Output A and B quadrature outputs with differential line drivers. Factory adjustable resolution normally set to 16,383 pulses for full scale. The built in rate multiplier may be used to adjust the resolution. A leads B for increasing input voltage.
Index Pulse One Index Pulse for 1024 output pulses prior to the rate multiplier. Differential line driver output.
Maximum Slew Rate 40,000 Pulses/Second
Rate Multiplier An eight bit rate multiplier set by dip switches to any value from 1/256 to 256/256. This effects the incremental outputs A & B only.
Limit Switch Drivers Current sinking from external power supply. 10 to 30 Volts D.C., 250 mA Max.
Click here to see a block diagram of the boards layout.


L9 is used to determine input range, 0 to 10 V or -1OV to +1OV

SW1 is used to set the rate multiplier.

Jumpers L1 – L4 are used in conjunction with potentiometers P1-P4 to set the switch points of the comparators.

Jumpers L5 – L8 are used to set the switch outputs for normally open or normally closed.

Q15 is the most significant digit.