<8. Detailed Description>
8.1.3 Checking Specification of Pulse Input
Pulse input can be implemented using a pulse input module (NFAP135) or using a
digital input module (NFDV151, NFDV161).
● Checking Specification of NFAP135 (Pulse Input Module)
Using NFAP135 enables input of higher frequency pulses than using a digital input
module.
Verify that the specification of the pulse transmitter to be used matches the
NFAP135.
SEE ALSO
Section A1.6.1, “Analog I/O Module (Specification)" of IM “STARDOM FCN/FCJ Guide.”
• Input mode
NFAP135 supports five input modes.
Dry contact pulse (open-collector contact)
Dry contact pulse (relay contact)
Voltage pulse
2-wire transmitter current pulse (4 to 20 mA)
3-wire transmitter voltage pulse
The connection method, transmitter power supply type, input resistance, etc.
depends on the selected input mode. Verify which mode is used by the
transmitter.
• Input frequency
NFAP135’s allowable input frequency range is 0 to 10 kHz.
Verify that the transmitter’s pulse frequency is within this range.
However, NFAP135’s input frequency range is 0 to 800 Hz when dry contact
pulse (open-collector contact) input mode is selected.
• Minimum input pulse width
NFAP135’s minimum allowable input pulse width is 40 µs.
Verify that the transmitter’s pulse width is larger than this value.
• Other check items
Read IM “STARDOM FCN/FCJ Guide”, which provides more details on the
specification of the module.
● Checking Specification of Digital Input Module (NFDV151, NFDV161)
NFDV151 and NFDV161 have a function for counting push button input edges,
which can be used for pulse input.
Verify that the specification of the pulse transmitter to be used is compatible with the
NFDV151 or NFDV161.
SEE ALSO
Section A1.6.2, “Digital I/O Module (Specification)” of IM “STARDOM FCN/FCJ Guide.”
To Next Page
Loading...
Need help?
General
