Laureate™ Pulse Input Batch Controller
With relay outputs for automated batch control

Features

• Accepts signals from turbine flowmeters, magnetic pickups, NPN or PNP transistors, digital logic, or AC from 12 mV to 250 Vac.
• Frequency input from 0 Hz to 1 MHz.
• 6-digit display scalable to ±999,999
• Count up from 0 to preset or down from preset to 0.
• Selectable "count by" of 10 or 100 with rounding.
• Selectable display of batch total, grand total, or number of batches, and rate.
• 8A relay for batch total, with settable delay between cycles.
• Additional 8A relay assignable to batch total for prewarn, grand total, number of  batches, or rate.
• Isolated 5, 10 or 24 Vdc excitation supply to power sensors.

• NEMA 4X, 1/8 DIN case

• Dual relay option

• Analog output option

• Serial communication options

• Low voltage AC & DC power

• Certified to UL 61010C-1 (UL mark), EN 61010-1 (CE mark), and RoHS.

The Laureate pulse-input batch controller is a powerful and highly accurate production workhorse in the form of a compact 1/8 DIN panel meter to control repetitive fill operations. It utilizes the Laureate FR dual channel pulse input signal conditioner and the Laureate dual relay board (8A contact or 120 mA AC/DC solid state relays).

The built-in six digit LED display can show the current batch total (Item #1), grand total or number of batches (Item #2), and flow rate (Item #3). All displayed values are scaled to engineering units of volume or flow. The batch total (Item #1) can be set up to count up from zero to a preset limit, or down from a preset limit to zero.

Either relay of the dual relay board can be assigned to the batch total (Item #1) to serve as a pre-warn to slow down filling near the setpoint, to the grand total or number of batches (Item #2), or to flow rate (Item #3). Fill operations are repeated continually with a programmable delay from 10 ms to 199.99 sec, or based on an external control input.

An optional RS-232 or RS-485 board allows the batch controller to transmit Items #1, #2 and #3, as well as peak for #3 (rate). If required, all four items can be displayed simultaneously by augmenting the batch controller with up to three Laureate remote displays. Each of these can have its own analog output and dual relays for alarm or control.

The pulse-input batch controller utilizes the Extended counter main board and FR dual channel signal conditioner board to accept a wide range of pulse signals, in particular those from turbine flow meters. The same signal is applied in parallel to the A and B channels, which are used independently. Either channel can accept pulse rates from 0.005 Hz to 250 kHz, which exceeds the working range of turbine flow meters.

• Channel A is used for totalizing. The measured total is scaled mathematically for control and display in engineering units, such as liters.

• Channel B is used for rate. The pulse frequency is determined by timing an integral number of periods over a specified gate time (plus 30 ms and 0-2 periods), and then taking the inverse of period. The inverse period approach allows much greater accuracy and faster update times than conventional rate meters which count signal pulses over a specified time interval. Update times can be as high as 25/sec. Rate in engineering units, such as liters per second, is obtained by multiplying the input by a scale factor.

For either total or rate, displayed values can be up to six digits (999,999) with a selectable decimal point.

Flow Meter Signal Conditioner

The FR dual-channel signal conditioner accepts pulses from all types of turbine flow meters and most industrial transducers with a pulse output such as proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickup pulses down to 12 mV, as well as AC inputs up to 250 Vac. Jumper selections provide optimum operation for different sensor types and noise conditions.

A built-in isolated 5, 10, or 24 Vdc excitation supply can power proximity switches and other sensors, and eliminate the need for an external power supply.

Other Features

The 1/8 DIN case of Laureate meters and counters meets NEMA 4X (IP-65) standards from the front for high pressure wash-down when panel mounted. All power and signal connections are via UL / VDE / CSA rated screw clamp plugs, which are standard.

AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups.
1 MHz.
250 kHz.
Common ground for channels A & B.
Nine ranges from (-12 to +12 mV) to (+1.25 to +2.1V).
250 Vac
1 MHz, 30 kHz,  250 Hz (selectable).
0, 3, 50 ms (selectable).

Crystal calibrated to ±2 ppm
±1 ppm/°C (typ)
±5 ppm/year

Drum Filling Application Utilizing Two Relay Outputs

Controlling the Mixing of Materials

Controller setup and monitoring of the mixing operation are facilitated by optional serial communications. RS-485 allows a single data line to handle multiple controllers.

Up-Counting Batch Control

Down-Counting Batch Control

Discrete Filling and Batch Counting