

JH2376 - Isolated Pulse Conditioner

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Model JH2376 pulse conditioner accepts a wide range of input voltages and waveforms and produces an isolated 5 volt logic pulse output at the same frequency. It may be used to isolate and condition signals ranging from millivolt-level magnetic pickups to 230Vac power frequencies. No calibration is needed - the output frequency automatically equals the input.
Two sets of input connections support a wide range of applications. The low input connection is optimized for sensors such as magnetic coil tachometer and turbine meter pickups, while high level applications such as power monitoring and variable frequency drives use the high input. (Use the high input for logic pulses.) Adjustable sensitivity, built-in hysteresis and optional filtering minimize interference from noise pickup. Applications range from turbine flow sensors and tachometers to power monitoring and other high voltage applications.
The one-inch-wide case snaps onto DIN rail. The terminal strip unplugs for ease of replacement. The JH2376 handles input frequencies from DC to 40kHz (0.2Hz minimum on high input). When used in high humidity or dirty environments, optional urethane circuit board coating is available.
| Model Number: | JH2376A (DC power is not available on this model) |
| Urethane Coating: | Specify Option U |
Model JH2376 snaps onto 35mm DIN rail. Connections are made to the front-panel terminals. The terminal unplugs to facilitate testing or replacing the instrument.
Connections to the 8 terminals (top to bottom) are:
1: High voltage positive input (generally above 1 volt - see specs).
2: Input common (for both high and low voltages).
3: Low voltage positive input (generally below 1 volt - see specs).
4: Optional filter. Connect terminals 4 & 2 together to activate the filter.
5: Pulse output (plus).
6: Pulse output common.
7: AC power.
8: AC power.
| High Inputs (Terminals 1 & 2): | For inputs generally above 1 volt (maximum 250Vrms or +/- 350V peak) with frequencies between 0.2Hz and 40kHz. Capacitively coupled - no response to DC. 1 megohm input impedence. See manual for detailed frequency range sensitivities. |
| Low Inputs (Terminals 3 & 2): | For inputs generally below 1 volt (maximum +/- 100V peak) with frequencies ranging from DC to 40kHz. Input must swing both plus and minus with no DC bias or offset. 50kohm input impedence. See manual for detailed frequency range sensitivities. |
| Input Sensitivity Adjustment: | 25 turn trimpot. Full clockwise - max. sensitivity (see detailed table in manual for sensitivities by frequency range). Full ccw reduces sensitivity (increases the required input) approximately 10:1. |
| Optional Input Filter: | Connect terminals 4 & 2 together. Recommended for use with magnetic coil tachometer pickups and other sensors whose output amplitudes increase with frequency. Also useful to reduce high frequency noise pickup |
| Output: | 0/+5V logic pulse. Output frequency equals the input. Pulse width and duty cycle will vary with input frequency, amplitude and waveform, but the frequency will not be affected. The output is in phase with (same polarity as) the input. |
| Isolation: | 3-way (input/output/power) 1,500Vac rms (2,100V peak). |
| Operating Temperature: | -10 to +60˚C (-40 to +140˚F). |
| Power Requirements: | 115 or 230Vac, 50/60Hz, 2.5V-A |