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AP7500 & AP7501 DC to Frequency Converter
Brand: EurothermThe AP7500 and AP7501 are useful in totalizing applications, where the total number of pulses counted in a given time period represents the time integral of the DC input. If, for example, the input represents a flow in gallons per hour, then the time integral of this flow signal (total count) will represent total gallons.
The AP7500’s 6V square wave output can be used to drive electronic counters (DTL, TTL, CMOS). The AP7501 can be used to drive electromechanical counters when connected to an external AC or DC power source. The AP7500 can also be used in telemetry systems, where the dc signal is converted to a frequency, transmitted over long lines, and then decoded at the receiving end by means of a frequency to DC converter, such as the AP7380.
In the AP7501, the DPDT relay contacts are pulsed (closed) for only a short duration (100 Milliseconds) for compatibility with standard electromechanical counters.
Features- Switch selectable output range
- Adjustable low end cutout (0 to 10%)
- Totalization/integration applications
- Plug-in installation
- Square wave (AP7500) or relay contact (AP7501) output
- Selectable 120/240 Vac input power
Specifications
Brand
Approvals & Certifications
- CSA C22.2, No. 0-M1982 (File No. LR42272-8, 9)
Consumption
- Power Consumption: 3 W Typical
- Power Consumption: 5 W, Maximum
Display
- LED Display
Electrical Connectors
- 11-Pin
- 8-Pin
Electrical Contacts
- Normally Closed
- Normally Open
Electrical Rating
- AP7501: 5 A at 120 Vac
- AP7501: 5 A at 28 Vdc (100 milliseconds Minimum on Time)
Frequency
- AP7500 (Output): 0 to 10 kHz
Input
- 0-10 V
- 100 mA - Maximum
- 200 V, Maximum
- 4-50 mA
- Current (Input Impedance): 100 KW
Linearity
- Best Straight Line & Linear Input: 0.25% of Span Typical
Materials of Construction
- Contact Material: Silver Cadmium Oxide
Mounting
- DIN Rail
- Track/Surface
Operating Temperature
- 0° to 60° C (32° to 140° F)
Output
- AP7500 (Sink): 50 mA
- AP7500 (Source): 10 mA
- AP7500: 0 to 36 ppm
- AP7500: 0 V Square-wave, 1:1 Mark / Space Ratio
- AP7500: 50 mA Sink, 30 V
- AP7500: 6 V Square-wave, 1:1 Mark / Space Ratio
- AP7500: Square Wave
- AP7501: 0 to 130 ppm
- AP7501: 0 to 16 Pph
Power
- 120/240 Vac (± 10%, 50/400 Hz)
Response Time
- 100 milliseconds Typical
- 200 milliseconds, Maximum
Span - Minimum
- 1 mA
- 200 mV
Stability
- Better than 0.05% of Span / °C
Storage Temperature
- -20° to 85° C (-4° to 185° F)
Switch Type
- AP7501: DPDT
Voltage
- Maximum
