Specifications

The M1890-S
Replacing Electromechanical Selsyn Systems
AVG Automation's M1890-S Programmable Selsyn Indicator
(PSI) is designed to replace electromechanical Selsyn torque
receivers driving mechanical production meters. It is complete-
ly solid-state and fully compatible with existing Selsyn systems.
It can be connected directly to Selsyn transmitter, differential
pair, or in parallel with mechanical indicators without loading
and needs no changes in the existing cables. The PSI derives
its power from the Selsyn reference voltage. The position
information from the Selsyn transmitter is converted to binary
data by an internal ratiometric converter and processed in the
microprocessor together with other program variables like scale
factor, preset number, etc. The actual position is then dis-
played on the front panel 5-digit display and parallel BCD
output is made available to provide information to other sys-
tems requiring positional data.
All the features described for 1890-R are also available for
1890-S model.
800-TEC-ENGR
www.avg.net
A-40
Position Transducers/Sensors