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FTB600B Series
Infrared Sensors
Section 4 - Infrared Sensor
A. Supply Voltage
24 Vdc. Do not exceed 24 Vdc. Doing so can cause overheating and
eventual failure of all PC boards. Printed circuit boards are non-
repairable.
B. Frequency Output
1. Square wave pulse, unscaled (See Figure 4-1)
2. Output impedance 75 ohms
3. Directly proportional to flow rate
4. Output - dc frequency
5. Offset 0.64 volts
6. Peak voltage = Supply voltage - 1.2 volts
7. Peak to peak voltage Supply voltage - 1.2 volts - 0.64 volts
8. Output signal cycle 66.7% (i.e. at 100 Hz there is a 6 millisecond “on”
time and a 4 millisecond “off” time)
9. TTL/CMOS circuit compatibility. The FTB600B Series has an
operational amplifier output, which has a high input impedance and a
low output impedance.