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5-50
IM 701210-05E
Explanation
Setting the Input: Input Setup
Preset
Select a preset to automatically enter settings appropriate for the signal (Some items
need to be manually entered). If you select User (user-defined), all the setup items can
be set arbitrarily. The following 10 presets are available. For details on the settings of
each preset, see appendix 13.
• Logic 5V, Logic 3V, Logic 12V, and Logic 24V
Use this preset when the output from the sensor or other equivalent item changes in
the range of 0 V to 5 V (or 3 V, 12 V, or 24 V: supply voltage applied to the sensor).
The voltage range is automatically set to the optimum voltage range, and the
threshold level is automatically set to one-half the voltage.
• Pull-up 5V
Use this preset when the sensor output is open collector or contact output. The pull-
up function is enabled only when this preset is selected. The pull-up voltage is
approximately 5 V, and the pull-up resistor is 4.7 k
Ω
. If you turn pull-up ON, set the
input voltage in the range of 0 V to 5 V. If the input voltage exceeds this range, the
protection circuit is tripped and the pull-up resistor is automatically cut off.
• ZeroCross
Use this preset when the input voltage changes around 0 V. The input coupling is
automatically set to AC, and the threshold level is automatically set to 0 V. When
setting the voltage range, be sure that the maximum amplitude does not exceed the
voltage range.
• AC100V or AC200V
Use this preset when measuring the supply voltage of 100-V or 200-V power supply
systems. The probe type is automatically set to 10:1; the voltage range is
automatically set to a value suitable for the input voltage and probe factor; and the
coupling is automatically set to AC. Be sure to use the isolated probe (700929) when
measuring the power supply voltage.
• EM Pickup: Electromagnetic Pickup
Use this preset when connecting the electromagnetic pickup directly. The voltage
range is automatically set to
±
1 V, and the threshold level is automatically set to 0 V.
• User: User-defined
Use this preset when entering the input conditions arbitrarily. Pull-up cannot be
specified.
Note
•
When measuring high voltage exceeding 42 V (AC+DCpeak) on the 701280 (FREQ), be
sure to use the isolated probe (700929).
•
Use EM Pickup only when connecting the electromagnetic pickup.
•
When set to EM Pickup, the LEDs of the frequency module do not illuminate in red even
when the range is exceeded.
•
The DL750/DL750P does not support electromagnetic pickups that require power supply
or those that require terminators at the output. For these types of electromagnetic pickup,
furnish appropriate measures on the sensor end.
•
The output from the electromagnetic pickup must be within 42 V
P-P
. The minimum
sensitivity is 0.2 V
P-P
. If the output is less than the minimum sensitivity, the measured
values may be unstable.
•
When using the pull-up function, do not let the voltage exceed the 0 to 5 V range. If the
voltage exceeds the range, the protection circuit will be tripped, and the pull-up circuit will
be cut off.
5.19 Setting the Frequency (Number of Rotations, Period, Duty Cycle, Power Supply Frequency,
Pulse Width, Pulse Integration, and Velocity) Measurement