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APPLICATIONS OF
Σ
-SERIES PRODUCTS
3.2.2
Inputting Position Reference
cont.
70
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 k
Ω
•
When Vcc is 5 V,
R1 = 180
Ω
Note
The signal logic for open collector output is as follows.
When Tr1 is ON
Equivalent to high level input
When Tr1 is OFF
Equivalent to low level input
Output
→
PL1 1CN-3
Power for Open Collector
Reference
For Position
Control Only
Output
→
PL2 1CN-13
Reference
Control Only
Output
→
PL3 1CN-18
For details, refer to the Connection Example 3 (When Power for Open Collector Refer-
ence is Used) shown below:
3
Host controller
Servopack
Photocoupler
↕
P: Represents twisted-pair cables
i
1CN-7
1CN-8
1CN-11
1CN-12
1CN-15
1CN-14