YASKAWA E-V Series User Manual page 81

(3) Clear Input Circuit
CN1 connector terminals, 15-14: Clear input is explained below.
An output circuit for the reference pulse and position error pulse clear signal at the host controller can be
either line-driver or open-collector outputs. The following shows by type.
Host controller
Applicable line driver
SN75ALS174
or the equivalent
Open-collector Output, Example 1:
The power supply in this example is not included with the Σ-V.
Host controller
Vcc
R1
Tr1
Use the examples below to set pull-up resistor R1 so the input
current, i, falls between 7 mA and 15 mA.
R1 = 2.2 kΩ with a
Vcc of 24 V ± 5%
(4) Safety Input Circuit
As for wiring input signals for safety function, input signals make common 0 V. It is necessary to make an
input signal redundant.
Input Signal Connection Example
24 V power supply
Fuse
0 V
Line-driver Output Circuit
SERVOPACK
150 Ω
1 kΩ
2.8 V ≤ CLR-/CLR ≤ 3.7 V
Input to the SERVOPACK may become
unstable and may turn OFF if the voltage
difference between the CLR signal and /CLR
signal (|CLR-/CLR|) is less than 2.8 V.
SERVOPACK
i
150 Ω
1 kΩ
V
F
V
= 1.5 to 1.8 V
F
Application Examples
R1 = 4.7 kΩ with a R1 = 180 Ω with a
Vcc of 12 V ± 5% Vcc of 5 V ± 5%
Switch
SERVOPACK
/HWBB1+ 4
/HWBB1- 3
6
/HWBB2+
/HWBB2- 5
3.4 Examples of Connection to Host Controller
3
3-33