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3. SIGNALS AND WIRING
(3) Pulse train input interface DI-2
Give a pulse train signal in the open collector system or differential line driver system.
(a) Open collector system
1) Interface
Servo amplifier
24VDC
OPC
PP, NP
DOCOM
SD
Approx. 1.2k
Max. input pulse
frequency 200kpps
2m or less
(Note)
Note. Pulse train input interface is comprised of a photo coupler.
Therefore, it may be any malfunctions since the current is reduced when connect a
resistance to a pulse train signal line.
If the command pulse train input is open collector method, it supports only to the sink
(NPN) type interface.
It does not correspond to the source (PNP) type interface.
2) Input pulse condition
0.9
0.1
tc
tHL
tc
tLH
tF
tLH=tHL<0.2 s
tc>2 s
tF>3 s
PP
NP
(b) Differential line driver system
1) Interface
SD
PG(NG)
PP(NP)
Max. input pulse
frequency 1Mpps
Servo amplifier
Am26LS31 or equivalent
10m or less
Approx. 100
V
OH
: 2.5V
V
OL
: 0.5V
(Note)
Note. Pulse train input interface is comprised of a photo coupler.
Therefore, it may be any malfunctions since the current is reduced when connect a
resistance to a pulse train signal line.
Driver
Driver