Signal Connection to External Devices
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DS1104 Hardware Installation and Configuration March 2004
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Input Circuit and Electrical Characteristics
Input circuit
The following illustration is a simplified diagram of the input circuitry
of the digital incremental encoders.
Electrical characteristics
The encoder interface supports single-ended TTL and differential
RS422 signals with the following characteristics.
1 k
Ω
150
Ω
1 k
Ω
4.7 nF
RS422/
Single
Ended
Converter
Digital
Converter
Interface
PHI0 (x)
PHI90 (x)
IDX (x)
PHI0 (x)
PHI90 (x)
IDX (x)
Parameter
Value
Min.
Max.
TTL input voltage
High
Low
2.0 V
0 V
5.0 V
0.8 V
TTL input resistance
12 k
Ω
RS422 input voltage
High
Low
Diff > +0.2 V
Diff < -0.2 V
•
Diff = Voltage difference between
non-inverted and inverted signal
•
The input signal, together with the
corresponding inverted signal, must
be in the range 0 ... 5 V.
RS422 input resistance
The input resistance gradually
drops from 8.5 k
Ω
at the corner
frequency of 28 kHz to 210
Ω
at the corner frequency of
225 kHz.
Содержание CLP1104
Страница 6: ...Contents DS1104 Hardware Installation and Configuration March 2004 I 6 ...
Страница 20: ...Safety Precautions DS1104 Hardware Installation and Configuration March 2004 I 20 ...
Страница 70: ...Implementing and Handling Applications DS1104 Hardware Installation and Configuration March 2004 I 70 ...
Страница 118: ...Mapping of I O Signals DS1104 Hardware Installation and Configuration March 2004 I 118 ...
Страница 156: ...Signal Connection to External Devices DS1104 Hardware Installation and Configuration March 2004 I 156 ...
Страница 162: ...Data Sheets DS1104 Hardware Installation and Configuration March 2004 I 162 ...