Inputting Position Reference; Connection Example 2: Open Collector Output - YASKAWA SGM series User Manual

3.2.2 Inputting Position Reference

1) Input a position reference by using the following input signal "reference pulse input."
SGDA- P
Since there are several specifications for input signal, select reference input for the sys-
tem to be created.
Positions
Inputs a move reference by pulse
input.
Position reference can correspond
to the following three types of out-
put form:
• Line driver output
• +12V Open collector output
• +5V Open collector output
Connection Example 1: Line Driver Output
Line Driver Used:
SN75174 manufactured by
Texas Instruments Inc., or
MC3487 or equivalent.

Connection Example 2: Open Collector Output

Sets the value of limiting re-
sistor R1 so that input cur-
rent i falls within the following
range:
Input Current i: 7 to 15 mA
Examples:
• When Vcc is 12 V,
R1 = 1 kΩ
• When Vcc is 5 V,
R1 = 180 Ω
Note The signal logic for open collector output is as follows.
3.2 Setting User Constants According to Host Controller
Reference pulse
input
Reference sign
input
Error counter
clear input
↕P: Represents twisted-pair cables
Host controller
Line driver
Host controller
When Tr1 is ON Equivalent to high level input
When Tr1 is OFF Equivalent to low level input
Servopack
Servopack
Photocoupler
Servopack
i
Photocoupler
↕P: Represents twisted-pair cables
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