YASKAWA SGDV - Examples of Connection to Host Controller; Reference Input Circuit

3.4 Examples of Connection to Host Controller
3-31
3
Wiring and Connection
3.4 Examples of Connection to Host Controller
This section shows examples of SERVOPACK I/O signal connection to the host controller.
3.4.1 Reference Input Circuit
(1) Analog Input Circuit
CN1 connector terminals, 5-6 (speed reference input) and 9-10 (torque reference input) are explained below.
Analog signals are either speed or torque reference signals at the impedance below.
• Reference speed input: About 14 kΩ or more
• Reference torque input: About 14 kΩ or more
The maximum allowable voltages for input signals is ±12 V.
(2) Position Reference Input Circuit
CN1 connector terminals, 7-8 (reference pulse input), 11-12 (reference sign input) and 14-15 (clear input) are
explained below.
An output circuit for the reference pulse and position error pulse clear signal at the host controller can be
among line-driver or open-collector outputs. The following shows by type.
Analog Voltage Input Circuit Analog Voltage Input Circuit (D/A)
1.8 kΩ (1/2 W) min.
25HP-10B
2 kΩ
3
2
12 V
1
0 V
SG
About 14 kΩ
SERVOPACK
V-REF or
T-REF
or more
0 V
SG
Host controller
About 14 kΩ
SERVOPACK
V-REF or
T-REF
D/A
or more
Line-driver Output Circuit
Open-collector Output, Example 1:
The power supply in this example is not included with Σ -V
Open-collector Output, Example 2:
Built-in 12 V Power Supply: Non-insulated line
receiver
2.8 V ≤ (H level) − (L level) ≤ 3.7 V
150 Ω
4.7 kΩ
Host controller
SERVOPACK
Applicable line
driver
SN75ALS174 or
equivalent
If the above formula is not satisfied,
the inputs to the SERVOPACK will be
unstable. Pulses may be missed from
the reference pulse input, reference
inversion may occur for the reference
sign input, and the clear signal may
be OFF for the clear input.
SERVOPACK
Vcc
Tr1
V
F
R1
i
Host Controller
150 Ω
4.7 kΩ
V
F = 1.5 to 1.8 V
Use the examples below to set pull-up resistor R1 so the input
current, i, falls between 7 mA and 15 mA.
Application Examples
R1 = 2.2 kΩ with a
Vcc of 24 V
±
5%
R1 = 1 kΩ with a
Vcc of 12 V
±
5%
R1 = 180 Ω with a
Vcc of 5 V
±
5%
PL1,PL2 or PL3 terminal
0 V
+12 V
4.7 kΩ
150 Ω
1.5 V or
less at ON
About
9 mA
SERVOPACK
Host Controller