Delta ASD-A2-0121 Series User Manual page 203

Chapter 6 Control Mode of Operation
For digital circuit, it uses 0 and 1 to represent two status, high voltage and low voltage. In
Positive Logic, 1 represents high voltage and 0 represents low voltage and vice versa in
Negative Logic.
For example:
Positive Logic
Negative Logic
Pulse Specification
High-speed Differential
pulse
Differential
Low-speed
pulse
Pulse Specification
High-speed pulse
Low-speed pulse
The Source of External Pulse:

0: Low-speed optical coupler (CN1 Pin: PULSE, SIGN)
1: High-speed differential (CN1 Pin: HPULSE, HSIGN)
Position pulse can be input from CN1 terminal, PULSE (43), /PULSE (41), HPULSE (38),
/HPULSE (29) and SIGN (36), /SIGN (37), HSIGN (46), /HSIGN (40). It could be open-collector
or Line Driver. Please refer to section 3.4.3 for wiring method.
6-6
Max. Input
Frequency
4 Mpps
Signal
500 Kpps
Signal
Open-
200 Kpps
collector
Differential Signal
Differential Signal
Open-collector
Minimum time width
T1 T2 T3
62.5ns 125ns 250ns
0.5μs 1μs 2μs
1.25μs 2.5μs 5μs
Max. Input
Frequency Specification
4 Mpps
500 Kpps 2.8V ~ 3.7V
200 Kpps 24V (Max.)
T4 T5
200ns 125ns 125ns
2μs 1μs
5μs 2.5μs
Voltage
Forward Current
5V < 25 mA
< 25 mA
< 25 mA
ASDA-A2
T6
1μs
2.5μs