App-34
IM DL850E-03EN
Appendix 8 Frequency Module (701280)
Specifications
The specifications for the Frequency Module (701280) are provided below. This module does not
comply with environmental standard EN50581.
Item Specifications
Standard operating conditions Temperature: 23 ±5°C
Humidity: 20 to 80% RH
After a 30-minute warm-up and after calibration
Measurement function Frequency, RPMs, RPSs, period, duty cycle, power supply frequency, pulse width, pulse
integration, and velocity
Effective measurement range 20 div (display range: 10 div)
Number of input channels 2
Data update rate 25 kHz (40 µs)
Output delay time Up to 2 computation periods
Input format Isolated unbalanced
Input connector Metal BNC connector
Maximum input voltage Combined with the 700929 (10:1), 702902 (10:1), or 701947 (100:1):
2
420 V (DC+ACpeak)
Combined with the (701901 + 701954) (1:1) or direct input (cable that does not comply with
the safety standards):
4
42 V (DC+ACpeak)
Maximum allowable common
mode voltage
Working voltage of safety standard
Combined with the 700929 (10:1), 702902 (10:1), or 701947 (100:1):
3
300 Vrms (CAT II)
Combined with the (701901 + 701954) (1:1) or direct input (cable that does not comply with
the safety standards):
5
42 V (DC+ACpeak) (CAT II, 30 Vrms)
Withstand voltage 1500 Vrms for 1 minute (across each terminal and earth) (60 Hz)
Allowable transient surge voltage
(instantaneous)
±2100 Vpeak (across each input terminal and earth)
Insulation resistance 500 VDC, 10 MΩ or more (across each input terminal and earth)
Minimum measurement resolution 50 ns
Measured data resolution 16 bits (2400 LSB/div)
Measurement accuracy
1
• When in frequency, RPM, RPS, or velocity measurement mode
6
Measurement accuracy is specified according to the measurement range and input
frequency
[Definition of measurement accuracy]
±(0.05% of 10 div + accuracy dependent on the input frequency)
[Accuracy dependent on the input frequency]
When input frequency is 2 kHz or less: 0.05% of the input frequency + 0.001 Hz
Input frequency of 2 kHz to 10 kHz: 0.1% of the input frequency
Input frequency of 10 kHz to 20 kHz: 0.3% of the input frequency
Input frequency of 20 kHz or higher: 0.5% of the input frequency
• When in power supply frequency mode
7
When the center frequency is 50/60 Hz: ±0.03 Hz (0.01 Hz resolution)
When the center frequency is 400 Hz: ±0.3 Hz (0.01 Hz resolution)
(Input set to AC100 V or AC200 V with sine wave input)
• When in period measurement mode
6
Measurement accuracy is specified according to the measurement range and input period
[Definition of measurement accuracy]
±(0.05% of 10 div + accuracy dependent on the input period)
[Accuracy dependent on the input period]
Input period of 500 µs or greater: 0.05% of the input period
Input period of 100 µs to 500 µs: 0.1% of the input period
Input period of 50 µs to 100 µs: 0.3% of the input period
Input period of 50 µs or less: 0.5% of the input period + 0.1 µs
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