YASKAWA SGM-A3 - Page 83

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 kΩ
• 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
R
e
f
erence
C
on
t
ro
l
O
n
l
y
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