Chapter 8 Parameters               ASDA-M 
8-40                Revision December, 2014 
 Logic Type 
  Logic  Pulse Type  Forward  Reverse 
0 
Positive Logic 
AB phase 
pulse 
Pulse
Sign
TH
T1T1 T1 T1 T1 T1
CW and 
CCW pulse 
Pulse + 
Symbol 
1 
Negative Logic 
AB phase 
pulse 
CW and 
CCW pulse 
Pulse + 
Symbol 
 
  Pulse 
Specification 
Max. Input 
Frequency
Minimum time width 
T1  T2  T3  T4  T5  T6 
High-speed 
pulse 
Differential 
Signal 
4Mpps 62.5ns 125ns 250ns 200ns 125ns 125ns
Low-speed 
pulse 
Differential 
Signal 
500Kpps 0.5μs1μs 2μs 2μs 1μs 1μs 
Open- 
collector 
200Kpps 
1.25μ
s 
2.5μs5μs 5μs 2.5μs 2.5μs 
 
Pulse Specification 
Max. Input 
Frequency 
Voltage 
Specification 
Forward Current
High-speed 
pulse 
Differential Signal  4Mpps  5V  < 25mA 
Low-speed 
pulse 
Differential Signal  500Kpps  2.8V ~ 3.7V  < 25mA 
Open- 
collector 
200Kpps  24V (Max.)  < 25mA