MODEL JH7580 USER-RANGEABLE FREQUENCY TRANSMITTER
PLUG-IN MODULE, ISOLATED
- Frequency Ranges from 10Hz to 100kHz
- Outputs from 0/0.5V to –10/+10V, 0/1mA to 0/25mA
- Fully User-Rangeable
- Quick-Check Red/Green Output LEDs
- Pullup Resistor and Sensor Excitation Included
- AC or DC Power Options
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.
ORDERING INFORMATION
Model Number: Select JH7580–AC for AC power or JH7580–DC for DC power.
Input/Output Ranges: 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.
Power: Specify 115Vac, 230Vac, 12Vdc or 24Vdc.
INSTALLATION AND CONNECTIONS
The JH7580 plugs into any standard 8-pin circular ("octal") relay socket. JH Technology offers two sockets: DS008 for DIN-rail or surface mounting and ST008 for Snap-Track mounting (see the Accessories page). Pin connections are:
Pin 1: Power (AC or, if DC power option, DC plus).
Pin 2: +18V (approx.) sensor excitation voltage output. See specifications.
Pin 3: Power (AC or, if DC power option, DC minus). Pin 4: Pullup resistor (3.9Kohms to +5V).
Jumper pins 4 and 5 together for use with dry contact or open-collector (NPN) inputs.Pin 5: Frequency input.
Pin 6: Input common.
Pin 7: Output plus.
Pin 8: Output minus.
DETAILED SPECIFICATIONS
Input Range Capabilities: From 0/10Hz to 0/100kHz. Expanded-scale inputs are sometimes possible.
(Input Impedance: 200kohms or greater.)
Input Amplitude: 350V peak (700V pk-pk, 250V rms sine wave) maximum.
Threshold Adjustment (25 turn trimpot): 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.Input Pullup Resistor: 3.9Kohms to +5V. Jumper pins 4 and 5 to activate. Input Sensor Excitation: Approx. 18Vdc, unregulated, 25mA max. current. Available at pin 2.
Voltage Output Range Capabilities: From 0/0.5V to –10/+10Vdc. Maximum output load, 10mA (1Kohm at 10V output).
Current Output Range Capabilities: From 0/1 to 0/25mA (includes 4/20mA). Output drive capability, 24V (1,200 ohms at 20mA).
Accuracy (if properly calibrated): +/-0.1% of span or better.
Adjustability: Sufficient to achieve all specified input and output ranges.
Linearity: +/-0.05% of span or better.
Isolation: Power, 1,500Vac rms (2,100V peak). Input/Output, 1,000Vac rms (1,400V peak).
Guaranteed Operating Temperature: -10 to +60 deg. C (14 to 140 deg. F).
Temperature Stability: +/-0.02% of span per deg. C, or better.
Power Requirements: AC, 115 or 230Vrms, 50/60Hz, 2.5V-A. DC, 12 or 24V, 2.5W.
