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Dual Pulse Input Channels for
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Features Standard Main Board
Extended Main Board All capabilities of the Standard Counter, plus:
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Description Laureate 4-20 mA output, pulse input frequency, rate and period transmitters accept two independently scalable input channels from a wide range of pulse sources, such as NPN or PNP proximity switches, contact closures, digital logic, magnetic pickups down to 12 mV, or AC voltages to 250 Vac. Input frequencies can range from 0.005 Hz to 1 MHz. The transmitter output can be selected as 4-20 mA or 0-10V and is isolated to avoid ground loops. Applications include AC line frequency, RPM or speed from proximity switch inputs, and flow from turbine flow meter inputs.
Exceptional Accuracy and Stability
The update rate of the analog output is a programmed gate time + 30 ms + 0-2 signal periods. For a 60 Hz signal, the update rate would be 20 per second. Such fast update rates are ideal for alarm and control applications. Transmitter programming is via a three-terminal RS-232 port using Laurel's PC-based Instrument Setup Software. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Laurel (P/N CBL03). The transmitters are housed in a DIN rail case that is only 22.5 mm (0.89") thick. Signal connections are via detachable screw clamp plug connectors. |
Laureate pulse
input frequency and rate transmitters determine
frequency by taking the inverse of period as measured with a calibrated
quartz crystal time base. This results in extremely accurate and stable
6-digit internal readings (±999,999 counts), which are then processed in
software. The analog output is generated by an ultra-linear 12-bit (4096 step)
digital-to-analog convert (DAC), whose output span can be adjusted from 0
to ±999,999 counts and zero can be adjusted from -999,999 to
+999,999 counts. The analog output has a rated
accuracy of ±0.05% of
output span.
Specifications
Laureate 4-20 mA Transmitters
Pulse Input for Frequency, Rate or Period
| Analog Input | |
| Types Grounding Channel A Frequency Channel B Frequency Minimum Signal Maximum Signal Noise Filter Contact Debounce Time Base Accuracy |
AC,
pulses from NPN, PNP transistors, contact closures, magnetic pickups. |
| Analog Output | |
|
Output Levels Compliance, 4-20 mA Compliance, 0-10V Output Resolution Output Accuracy Output Update Rate Output Isolation |
4-20 mA and 0-10 Vdc (selectable) 10V ( 0-500 ohm load ) 2 mA ( 5 kOhm load ) 12 bits (4,096 steps) ±0.05% of output span Programmed gate time + 30 ms + 0-2 signal periods 250V rms working, 2.3 kV rms per 1 minute test |
| Transducer Excitation Output (standard) | |
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Jumper Selection 1 Jumper Selection 2 Jumper Selection 3 |
10V @ 60 mA, isolated to 50V from signal ground 5V @ 50 mA, isolated to 50V from signal ground 15V @ 60 mA, non-isolated |
| Dual Relay Output (optional) | |
|
Relay Type Load rating |
Two solid state relays, SPST, normally open,
Form A 120 mA at 130 Vac or 170 Vdc, 28 ohms series resistance. |
| Power Input | |
|
Standard power Low power option Frequency Power Isolation |
95-240V AC ±10% or 90-300V DC 12-30V AC or 10-48V DC DC or 47-63 Hz 250V rms working, 2.3 kV rms per 1 min test. |
| Mechanical | |
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Case Dimensions Case Mounting Electrical Connections |
120 x 101 x 22.5 mm 35 mm rail per DIN EN 50022 Detachable screw clamp plug connectors |
| Environmental | |
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Operating Temperature Storage Temperature Relative Humidity |
0°C to
70°C -40°C to 85°C 95% at 40°C, non-condensing |
| Typical
Applications (illustrated with Laureate 6-digit counter) |
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AC Line Frequency |
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Laureate frequency meters or transmitters will accept line voltages up to 250 Vac and display line frequency to 6-digit accuracy (50.0000 or 60.0000) in a few line cycles. Fast low frequency response is achieved by timing the period and taking its inverse. |
RPM and Speed |
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he Laureate frequency meters or transmitters can sense the low-level signals from magnetic pickups or the NPN or PNP transistor output of active sensors. These can be powered directly by the meter. Display in RPM or units of speed is achieved by mathematically scaling the meter. |
Flow Rate and Simultaneous Total |
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Laureate frequency meters or transmitters are compatible with all flow meters which generate pulses at a frequency proportional to flow rate. The Extended version can display scaled rate or total for the same input at the push of a button, and alarm from both the rate and total. The Extended version can also linearize flow transducers so as to extend their dynamic range. |
Combining Two Rates |
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Extended Laureate frequency meters or transmitters offers A+B, A-B and A/B arithmetic functions. A+B allows two input flows to be summed for total flow, while A-B allows outflow to be subtracted from inflow for net flow. Flow ratios aid in the proper mixing of ingredients |
Custom Curve Linearization |
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Extended Laureate frequency meters or transmitters can linearize the output turbine flow meters, which tend to be nonlinear on the low end. Linearizing improves the dynamic range and accuracy of turbine flow meters. |
System-level Capabilities |
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The Laureate dual channel rate meters or transmitters can independently scale, display and alarm two pulse input channels. All signal or alarm data can further be transmitted via RS-232 or RS-485, including peak readings and arithmetic combinations of the two rates. |
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Pinout
Laureate 4-20 mA Transmitters
Pulse Input for Frequency, Rate or Period
(shown with optional dual relay
output)
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Transmitter
Powering a Single Sensor |
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| Transmitter Powering Two Sensors | Transmitter with Active or Passive Sensors |
Ordering
Guide
Laureate 4-20 mA Transmitters
Pulse Input for Frequency, Rate or Period
| Create a model
number in this format: TA602FR. This is for a 4-20 mA transmitter,
Standard main board, 95-240 Vac power, isolated dual
solid state relays, and dual channel pulse input
signal conditioner. Includes detachable screw clamp
connectors. |
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Transmitter Type |
TA Laureate 4-20 mA Transmitter. | $235 |
| Main Board |
6 Standard Main Board. 8 Extended Main Board |
NC $40 |
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With Standard
Main Board: Scalable to ±999,999 for frequency,
rate, square root of rate, up or down total, period,
A-to-B time interval. With Extended Main Board: Above, plus rate and total simultaneously, ratio (A/B), draw (A/B-1), other arithmetic functions (AxB, A+B, A-B), phase angle, stopwatch, up/down counting, batching operation, linearization of nonlinear inputs. |
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| Power |
0 Isolated 95-240 Vac & 90-300 Vdc 1 Isolated 12-30 Vac & 10-48 Vdc. |
NC $30 |
|
Setpoint Output |
0 None. 2 Isolated Dual Solid State Relays. |
NC $30 |
| Input Type | FR Dual-Channel Frequency. | NC |
| Accessories |
CBL03 RS-232 cable, TA to computer. CBL02 USB to RS-232 cable adapter. |
$19 $39 |
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Order from distributors for shipment to USA or Canada. |
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Order online for international shipment. |
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Resource Pages |
