Pu21003b_oi_e.doc / Apr-16
Page 5 / 11
2. Introduction
This universal level converter, on the input side, can accept single channel and quadrature
encoder signals with either RS422 format or TTL level or HTL (10-30V) level. Where the signal
provides direction information, the direction may be defined by either an A/B-90° phase
displacement, or by a static direction signal.
Independent of the input level and the mode of direction information, the output provides
A, /A, B, /B und Z, /Z signals, and again the direction may be selected as quadrature A/B
format or as a static direction signal. The outputs provide push-pull characteristics and the
output level is about 1.5 volts lower than the power supply voltage (+5 to +30 volts DC).
Inputs and outputs are isolated via inductive high-speed couplers. All signals can be connected
alternatively via SUB-D-connectors or by parallel screw terminal strips.
PU210 uses a slim and space-saving plastic housing for DIN rail mounting.
The subsequent block diagram explains all essential details:
1
2
3
4
5
6
7
8
9
1
B
Z
6
2
A
Z
7
3
A
8
4
B
9
5
Screen
Z
Z
B
B
A
A
+V1
GND
in
9
1
B
Z
6
2
A
Z
7
3
A
8
4
B
9
5
Screen
Z
Z
B
B
A
A
VIN= 5-30V
GND
out -
Input
Output
Power
8
7
6
5
4
3
2
1
Potential separation
Richtung
direction
2x 90°
Richtung
direction
2x 90°
X1
X2
X3
X4
Even with differential operation on the input side it may be advantageous to
connect the signal common to GND
in
(terminal 9 of X2 or pin 5 of X1).
This may result in better signal quality and will not affect at all the potential
separation between input and output
