20
•
Single Connections
Connection to Line Driver Output
To drive the PPCI7443 encoder input, the driver output must provide at
least 3.5V across the differential pairs with at least 6 mA driving capability.
The ground level of the two sides must be tight together too.
A,B phase signals
Index signal
EXGND
GND
EA- , EB- , EZ-
EA+ , EB+ , EZ+
PPCI7443
External Encoder/Driver
With line driver output
Connection to Open Collector Output
To connect with open collector output, an external power supply is
necessary.
Some motor drivers also provide the power source.
The
connection between PPCI7443, encoder, and the power supply is shown in
the following diagram. Please note that the external current limit resistor R
is necessary to protect the PPCI7443 input circuit. The following table lists
the suggested resistor value according to the encoder power supply.
Encoder Power(VDD)
External Resistor R
+5V
0
Ω
(None)
+12V
1.8k
Ω
+24V
4.3k
Ω
If=6mA max.
A,B phase signal
Index signal
EA- , EB- , EZ-
EA+ , EB+ , EZ+
PPCI7443
Motor Encoder/Driver
With Open Collector Output
VDD
GND
External Power
for Encoder
R
For more detail operation of the encoder feedback signals, please refer to
section 4.4.
Содержание PPCI7443
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Страница 27: ...Single Connections 19 which are equipped with 1 differential line driver or 2 open collector output...
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