Pu202_02d_oi_e.doc / Apr-16
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2.
Introduction
PU202 is designed for conversion of HTL impulse signals (10 … 30 VDC) to RS422 Standard or
TTL level, including complements. Also, the unit can translate different modes of direction
control to the A / B quadrature mode (2 x 90°), which is required for the majority of controllers.
Some measuring systems or PLC positioning cards generate pulses on one line whilst another
line provides static information of the direction of rotation. Other systems use two separate
lines, one to transmit the forward pulses and the other to transmit the reserves pulses.
The PU 202 converter can translate any of these formats to the usual A/B quadrature standard,
as shown in the drawing below.
2.1.
In- and output pulse diagram:
For vice-versa conversion of level and direction signal, see type PU204.
