4-20 mA Current Output Transmitter for Time Interval of Periodic Events

From from 1 µs to 199.999 s. Resolution to 0.2 µs. DIN Rail mounted, digitally programmable.
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4-20 mA Current Transmitter of Time Interval of Periodic Events
Key Features
  • Transmits average time of periodic events from from 0.2 µs to 999,999 hrs
  • Resolution to 0.2 µs, rep rate to 250 kHz
  • Inputs from NPN or PNP proximity switches, contact closures, digital logic, or magnetic pickups down to 12 mV.
  • Isolated 4-20 mA or 0-10V transmitter output, selectable
  • Output resolution: 0.0015% of span (16 bits)
  • Output accuracy: ±0.02% of span
  • DIN rail mount housing only 22.5 mm wide
  • Plug-in screw-clamp connectors
  • 5V, 10V or 24V dc sensor excitation output, isolated
  • Dual solid state relays for alarm or control, isolated
  • RS232 or RS485 serial communications, isolated
  • Universal AC power, 85-264 Vac
  • Optional low voltage power, 10-48 Vdc or 12-32 Vac
  • Easy setup with PC-based Instrument Setup Software
Description

Time Interval Mode for Time DelayThe Laureate 4-20 mA output, time interval transmitter can transmit pulse width or time delay between individual pulses to a resolution of 0.2 µs for periodic events. It can also transmit average pulse width or average time delay between multiple pulses.

Time interval is measured between inputs on channels A and B. Timing starts when a pulse is applied to Channel A (selectable positive or negative edge), and ends when a pulse is applied to Channel B (selectable positive or negative edge). In case of a single pulsed signal, the A and B inputs can be tied together. A positive or negative slope may be selected to start timing, and the opposite slope must be selected to stop timing. Timing is achieved by counting 5.5 MHz clock pulses. Multiple integral time intervals are averaged over a gate time which is selectable from 10 ms to 199.99 s and also controls the maximum output rate.

Signal Conditioner Board for Laureate Digital Time Interval Transmitter and Digital TimerThe dual-channel signal conditioner used for pulse detection accepts inputs from proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickups, contact closures, and other signals from 12 mV to 250 Vac. Jumper selections provide optimum operation for different sensor types and noise conditions. A built-in 5V, 10V or 24V dc excitation supply can power proximity switches and other sensors, and eliminate the need for an external power supply.

Standard features of Laureate transmitters include:

  • Analog transmitter output, 16-bit, user scalable and isolated. User selectable 4-20 mA, 0-20 mA or 0-10V levels.
  • Serial communications, isolated. User selectable RS232 or RS485, half or full duplex, Modbus or Laurel ASCII protocol.
  • Dual solid state relays for control or alarm, isolated. Rated 120 mA at 130 Vac or 170 Vdc.
  • Transducer excitation output, isolated. User selectable 5V@100 mA, 10V@120 mA or 24V@50 mA.
  • Universal AC power supply for 85-264 Vac.

Easy Transmitter programming is via Laurel's Instrument Setup Software, which runs on a PC under MS Windows. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Laurel (P/N CBL04).

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