11.3 Inputting a Pulse Signal
171
Chapter 11 Using Pulse Input and Output
11
Filter Frequency High/Low period
ON
(Mechanical contact use)
25 Hz or less 20 ms or more
OFF
(Electronic contact use)
5 kHz or less 100 s or more
• The pulse input low terminal is common with the instrument GND
and is not isolated. Isolate input as necessary.
• If the pulse input cable is grouped with other cables, interference
such as noise from external sources may cause the instrument
to malfunction. Pulse input cables should be routed separately.
• Excessively long cables may suffer f
rom interference such as
noise from external sources, causing the instrument to malfunc-
tion. If you encounter this issue, attach a ferrite clamp to the
ca
ble as sho
wn in the figure below. (Position the clamp as close
as possible to the terminal block.)
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