YASKAWA Sigma II Series User Manual page 45

Sigma II User's Manual
3.4.4 Interface Circuits
This section shows examples of servo amplifier I/O signal connection to the host control-
ler.
n
Interface for Reference Input Circuits
Analog Input Circuit
Analog signals are either speed or torque reference signals at the impedance below.
• Speed reference input: About 14kΩ
• Torque reference input: About 14kΩ
The maximum allowable voltage for input signals is ±12V.
Reference Position Input Circuit
An output circuit for the reference pulse and error counter clear signal at the host control-
ler can be either line-driver or open-collector outputs. These are shown below by type.
Line-driver Output Example:
Host controller end
Applicable line-driver
SN75174 manufactured by
TI, or the equivalent
• Open–collector Output, Example 1: External power supply
Host
controller end
1.8kΩ (½W) minimum
3
25-HP-10B 2
12V
2kΩ
1
1000:1
R1
i
Tr1
3-17
Servo Amplifier
V-REF or
T-REF
About 14kΩ
SG
0V
Servo amplifier end
150Ω 4.7kΩ
2.8V ≤ (High level) - (Low level) ≤ 3.7V
Servo amplifier end
4.7kΩ
150Ω
VF = 1.5 to 1.8V
Chapter 3: Wiring