Model JH7580 provides an isolated DC output proportional to the input signal’s frequency or pulse rate. It can handle inputs from 50mV to 700V peak-to-peak (see specifications) without recalibration. Input and output ranges are fully user-rangeable. Input/output isolation eliminates ground loops and guards against shock hazards when using high-voltage inputs. A sensitivity adjustment provides optimum tradeoff between sensitivity and noise rejection for each application.
Red-green Quick-Check LEDs give a quick indication of the relative output. Red is brighter at the low end, green at high, while at mid-scale both are approximately equal. Red-only indicates offscale low while green-only indicates offscale high. AC or DC power choices are available.
Pin connections allow the selection of two options: a pullup resistor for dry-contact or open collector inputs and a built-in DC excitation supply (approx. 18V) for low-current DC proximity sensors (25mA max). AC and DC power choices are available.
For a fixed-range frequency transmitter see Model JH7010.
Select JH7580–AC for AC power or JH7580–DC for DC power.
The JH7580 is normally shipped tested but uncalibrated. If you would like us to calibrate it to specific input and output range settings simply specify on your order. We’ll do it at no extra charge.
Specify 115Vac, 230Vac, 12Vdc or 24Vdc.
The JH7580 plugs into any standard 8-pin circular ("octal") relay socket. JH Technology offers a socket suitable for DIN-rail or surface mounting (see the Accessories page). Pin connections are:
Power (AC or, if DC power option, DC plus).
+18V (approx.) sensor excitation voltage output. See specifications.
Pullup resistor (10Kohms to +5V).
Jumper pins 4 and 5 together for use with dry contact or open-collector (NPN) inputs.
Frequency input. (For normal inputs use pins 5&6)
From 0/10Hz to 0/100kHz. Expanded-scale inputs are sometimes possible. For example, to create a 0/10V output from a 40/80Hz input set the transmitter up for 0/80Hz input, -10/+10V output. The output will be 0V at 40Hz. (Input Impedance: 200kohms or greater.)
Standard output ranges are: 0/1V, -1/+1V, 0/2V, 0/5V, 1/5V, 0/10V, -10/+10V, 0/1mA, 1/5mA, 0/10mA, 0/20mA, 4/20mA.
350V peak (700V pk-pk, 250V rms sine wave) maximum.
Maximum sensitivity (full clockwise): 50mV pk-pk for frequencies below 1kHz. Increases with frequency to 1V pk-pk at 100kHz.
Minimum sensitivity (full counterclockwise): 8V pk-pk for frequencies below 1kHz. Increases with frequency to 20V pk-pk at 100kHz.
Approx. 18Vdc, unregulated, 25mA max. current. Available at pin 2.
+/-0.1% of span or better.
Sufficient to achieve all specified input and output ranges.
+/-0.05% of span or better.
Power, 1,500Vac rms (2,100V peak). Input/Output, 1,000Vac rms (1,400V peak).
-10 to +60 deg. C (14 to 140 deg. F).
+/-0.02% of span per deg. C, or better.