Eurotherm DC to Frequency Converter, AP7500 and AP7501
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AP7500 & AP7501 DC to Frequency Converter

Brand: Eurotherm
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The 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. 

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

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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, Max.

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 Min. on Time)

Frequency

  • AP7500 (Output): 0 to 10 kHz

Input

  • 0-10 V
  • 100 mA - Max.
  • 200 V, Max.
  • 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, Max.

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

Documentation

Data Sheets

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