 |
 |
 |
 |
The Laureate™ quadrature meter with the Standard counter main board accepts the A & B quadrature signals from shaft encoders or linear encoders to provide a highly accurate, scaled display of position, length, or angle in engineering units, such as ft, cm or degrees. The A & B quadrature signals are 90° out of phase, and their phase relationship determines whether up counts (+) or down counts (-) are counted. The meter totalizes the counts and then scales the total in software for display and control. A zero index signal, or Z signal, can be added as a third input to the A & B signals.
The Laureate™ quadrature meter with the Extended counter main board can be set up for scaled position or rate, but not for simultaneous position and rate. For example, it can display the speed of a moving slab in ft/sec. The display and control output update rate for position or rate is normally set to a maximum of 25/sec, as determined by a user-programmable gate time.
If the counts are only for one direction, for example for extusions measured by an encoder wheel, only the encoder's "A" channel can be used and be output to an Extended Laureate totalizer. This model accommodates very high pulse rates up to 1 MHz, and unlike the quadrature meter, it can simultaneously track rate and total. It can also be programmed for batch control, which allows it to simultaneously track rate, batch (or current) total, and grand total or number of batches.
Optional plug-in boards for communications and control include Ethernet, WiFi and serial communication boards, dual or quad relay boards, and an isolated analog output board. Laureates may be powered from 85-264 Vac or optionally from 12-32 Vac or 10-48 Vdc. The display is available with red or green LEDs. The 1/8 DIN case meets NEMA 4X (IP65) specifications from the front when panel mounted. Any setup functions and front panel keys can be locked out for simplified usage and security. A built-in isolated 5, 10, or 24 Vdc excitation supply can power transducers and eliminate the need for an external power supply. All power and signal connections are via UL / VDE / CSA rated screw clamp plugs.
| Display | |
|---|---|
| Readout | 6 LED digits, 7-segment, 14.2 mm (.56"), red or green. |
| Display Range | -999999 to +999999, XXXXEX notation beyond 999999 |
| Zero Adjust | -999999 to +999999 |
| Span Adjust | 0 to 999999 |
| Indicators | Four LED lamps |
| Inputs | |
| Types | Differential or single-ended quadrature |
| Transitions Monitored | X1, X2 or X4 |
| Max Pulse Rate | 250 kpulses/sec at X1, 125 kpulses/sec X2, 62.5 kpulses/sec at X4 |
| Position Error | No error contributed by meter |
| Differential High Threshold | +200 mV |
| Differential Low Threshold | -200 mV |
| Differential Limits | -11V to +14V |
| Single-ended High Voltage | 2.5V to 10V |
| Single-ended Low Voltage | -1V to +1V |
| Input Resistance, Typ. | 17 kOhm |
| Quadrature Position Mode | |
| Zero Adjust | -999999 to +999999 |
| Span Adjust | 0 to 999999 |
| Quadrature Rate Mode | |
| Freq. Technique | Inverse period |
| Conversion Time | Gate time + 30 ms + 0-2 signal periods |
| Gate Time | Selectable 10 ms to 199.99 s |
| Time Before Zero Out | Selectable 10 ms to 199.99 s |
| Output & Display Update | Same as conversion time |
| Time Base Accuracy | Calibrated to ±2 ppm |
| Power Supply Boards (one required) | |
| Voltage, standard | 85-264 Vac or 90-300 Vdc |
| Voltage, optional | 12-32 Vac or 10-48 Vdc |
| Frequency | DC or 47-63 Hz |
| Power Consumption (typical, base meter) | 1.2W @ 120 Vac, 1.5W @ 240 Vac, 1.3W @ 10 Vdc, 1.4W @ 20 Vdc, 1.55W @ 30 Vdc, 1.8W @ 40 Vdc, 2.15W @ 48 Vdc |
| Power Isolation | 250V rms working, 2.3 kV rms per 1 min test |
| Excitation Output (standard) | |
| 5 Vdc | 5 Vdc ± 5%, 100 mA |
| 10 Vdc | 10 Vdc ± 5%, 120 mA |
| 24 Vdc | 24 Vdc ± 5%, 50 mA |
| Output Isolation | 50 Vdc to meter ground |
| Analog Output Boards (one optional) | |
| Output levels | 4-20 mA, 0-20 mA, 0-10V, -10 to +10V (single-output option) |
| Current compliance | 2 mA at 10V ( > 5 kΩ load) |
| Voltage compliance | 12V at 20 mA (< 600 Ω load) |
| Scaling | Zero and full scale adjustable from -99999 to +99999 |
| Resolution | 16 bits (0.0015% of full scale) |
| Isolation | 250V rms working, 2.3 kV rms per 1 min test |
| (dual analog outputs share the same ground) | |
| Relay Output Boards (one optional) | |
| Dual magnetic relays | 2 Form C, 8A at 250 Vac or 24 Vdc, 0.3A at 250 Vdc, resistive load |
| Quad magnetic relays | 4 Form A (NO), 8A at 250 Vac or 24 Vdc, 0.3A at 250 Vdc, resistive load |
| Dual solid state relays | 2 Form A (NO), 120 mA at 140 Vac or 180 Vdc, resistive load |
| Quad solid state relays | 4 Form A (NO), 120 mA at 140 Vac or 180 Vdc, resistive load |
| Relay commons | Isolated commons for dual relays or each pair of quad relays |
| Relay isolation | 250V rms working, 2.3 kV rms per 1 minute test |
| Relay latching modes | Latching or non-latching |
| Relay active modes | Active on or off, active high or low |
| Hysteresis modes | QA passband mode, split hysteresis, span hysteresis |
| Communication Boards (one optional) | |
| Board selections | RS232, RS485 with dual RJ11 connectors, RS485 with dual RJ45 connectors, USB, Ethernet, USB-to-RS485 gateway, Ethernet-to-RS485 gateway, WiFi with built-in antenna plus USB & RS485, WiFi with external antenna plus USB & RS485 |
| Protocols | Laurel Custom ASCII (serial), Modbus RTU (serial), Modbus TCP (Ethernet or WiFi) |
| Digital addresses | 247 (Modbus), 31 (Laurel ASCII), |
| Isolation | 250V rms working, 2.3 kV rms per 1 min test |
| Environmental | |
| Operating temperature | 0°C to 55°C standard, -40°C to 70°C with -X option |
| Storage temperature. | -40°C to 85°C |
| Relative humidity | 95% at 40°C, non-condensing |
| Protection | NEMA-4X (IP-65) when panel mounted |
| Using Quadrature for Cutting to Length | |
|---|---|
 |
Controlling the repetitive cutting of material to length is an excellent application of the Laureate quadrature meter. The quadrature encoder shares the shaft of a sensing wheel, whose rotation corresponds to lineal displacement of material. The meter compares the displacement reading against setpoint information, and then uses its dual relays to first slow down and then cut the material. |
| Using Quadrature for X-Y Positioning | |
 |
Accurate X-Y position or rate can be obtained from two shaft encoders, which convert linear position to quadrature signals as a shaft turns. In addition to serving as a display, each Laureate can use its optional dual relay setpoint capability for closed loop control. It can also transmit data via RS232, RS485, or a 4-20 mA analog signal. |
| Using Quadrature to Monitor a Drilling Operation | |
 |
Quadrature can be used to track position and vertical drilling speed of the bit in an oil drilling operation. A shaft encoder is rotated by a cable that moves with the drilling shaft. In this application, the same encoder signal is applied to a Laureate quadrature meter for position, and to a second quadrature meter for rate. Both meters can be scaled to read out in appropriate engineering units, such as feet and inches per minute, and can be alarmed. A Laureate 6-digit remote display could be added to read out peak rate. |
 |
|
|||||||||
| © 1990-2024 Laurel Electronics | ||||||||||
