New PC Process Counter/Totalizers

NEW Nidec-SHIMPO PC-QD Process Counter Totalizer

Shimpo Instruments, A Division of Nidec-Shimpo America Corp., has released its new PC-QD 1/8 DIN Process Counter/Totalizer, designed for process automation counting or totalizing applications. The PC-QD is a quadrature meter that accepts the A & B quadrature signals from linear encoders or shaft 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 PC-QD meter totalizes the counts and then scales the total for display and control. A zero index signal, or Z signal, may be added as a third input to the A & B signals.

The PC-QD can count one, two or four transitions at a maximum combined rate of 250 kHz and be mathematically scaled for display in engineering units from -999,999 to +999,999. The quadrature board has input circuitry which may be jumpered for either single-ended input signals or for balanced line driver signals. Anti-jitter circuitry eliminates errors produced by vibration of the encoder. In the event of a power failure, the latest total may be stored in non-volatile memory and can be used as the starting point for counting when power resumes.

If provided by the encoder, a zero index pulse is interpreted by the meter as indicating a zero reference for an integral number of revolutions of a rotary shaft encoder or the home position of a linear encoder. It is used by the meter for initializing and to correct for any cumulative pulse count errors. Special circuitry corrects for width of the zero index pulse. Use of the optional extended counter can convert the quadrature meter from scaled position to scaled rate. For example, it can display the speed of a moving slab in ft/sec or other engineering units.

The PC-QD’s offer Universal AC or DC power selections which enables flexibility with usage in various power situations. Optional 8 A contact or 120 mA solid state relay outputs, plus an analog process signal output with 4 user-selectable current or voltage ranges are available. To provide a higher level of communication and integration into a system’s network, several communication protocols such as RS-232, RS-485 and even USB options are available. Units come standard with an isolated excitation output to power transducers, eliminating need for additional power supply.

The excellent offering provided by the PC-QD Process Counter/Totalizer make them ideal in various speed and motion applications utilizing quadrature rotary encoder sensors.

NEW Nidec-SHIMPO PC-AN Process Counter Totalizer

Shimpo Instruments, A Division of Nidec-Shimpo America Corp., has released its new PC-AN 1/8 DIN Process Counter/Totalizer, designed for process automation counting or totalizing applications. The PC-AN displays rate or totalized rate to six digits for 0-1 mA, 4-20 mA or 0-10 V analog process signal inputs. The scaling capability allows the unit to display flow rates in gallons/minute or liters/sec or volumes in gallons or liters corresponding to the output of a flow transducer. Another typical application for the PC-AN’s is to scale the unit to display power consumption in kilowatts or total utilized energy in kilowatt-hours based on an output of a power transducer. Square root extraction is selectable and can be applied to rate or total, ideal for use with differential pressure flow meters which have a squared output.

Extended PC-AN models can provide batch control based on linearized total. Extended units can totalize linearized flow from an analog rate signal, count up to a preset value, or count down to zero from a preset value for batch control. Another offering of extended models is the time based on rate calculation where units display the time inversely proportional to measured rate, ideal in applications such as the time that it will take a conveyor to traverse an oven. As the rate of the conveyor is increased, the displayed baking time is decreased.

The PC-AN’s offer Universal AC or DC power selections which enables flexibility with usage in various power situations. Optional 8 A contact or 120 mA solid state relay outputs, plus an analog process signal output with 4 user-selectable current or voltage ranges are available. To provide a higher level of communication and integration into a system’s network, several communication protocols such as RS-232, RS-485 and even USB options are available. Units come standard with an isolated excitation output to power transducers, eliminating need for additional power supply.

The excellent offering provided by the PC-AN Process Counter/Totalizer make them ideal in various flow rate applications such as the display of flows from various transmitters, plus differential pressure sensors with their square root extraction capabilities

NEW Nidec-SHIMPO PC-FR Process Counter Totalizer

Shimpo Instruments, A Division of Nidec-Shimpo America Corp., has released its new PC-FR 1/8 DIN Process Counter/Totalizer, designed for process automation counting or totalizing applications. The PC-FR is a dual-channel frequency, rate and period counter or totalizer that accepts inputs from contact relays or proximity and magnetic sensors that produce one of the following outputs: PNP/NPN, TTL or CMOS logic, contact closure, or AC signals from 12 mV to 250 V ac. Each channel (A or B) may be independently set up and scaled to count up from zero or a set value to a preset limit, or down from a set value to zero or limit. Either channel can easily be displayed via a front panel pushbutton.

The PC-FR Counter/Totalizer comes with a versatile, decimal point adjustable 6 digit display capable of any value from +/-999,999 for frequencies ranging from 0.005 Hz to 1 MHz, rates in various engineering units and period (inverse of frequency). The scaling function allows direct readout in any engineering unit such as gallons or cubic feet sensed from a turbine flow meter, or the ability to show the total quantity of containers in cartons detected on a conveyor from an optical sensor. Totaled values are stored in non-volatile memory enabling retention in the absence of power.

Available extended models can provide rate and total simultaneously with one channel displaying total while the other displays process rate. This mode is ideal for flow applications when the same signal is applied to both channels. Included with extended models are several arithmetic functions such as A+B, A-B, AxB, A/B and A/B-1 (draw). For example, A+B allows two input flows to be summed for total flow, while A-B allows outflow to be subtracted from inflow for a net flow result. If transducers with a frequency output are used, AxB allows horsepower to be displayed based on measured torque and RPM or based on force and velocity. A/B can be used for the proper mixing of ingredients, while A/B-1 (draw) is used to compare rates for stretching or tensioning.

The PC-AN’s offer Universal AC or DC power selections which enables flexibility with usage in various power situations. Optional 8 A contact or 120 mA solid state relay outputs, plus an analog process signal output with 4 user-selectable current or voltage ranges are available. To provide a higher level of communication and integration into a system’s network, several communication protocols such as RS-232, RS-485 and even USB options are available. Units come standard with an isolated excitation output to power transducers, eliminating need for additional power supply.

The excellent offering provided by the PC-FR Process Counter/Totalizer make them ideal in various applications such as the display of AC line frequencies to 250 V ac, RPM monitoring, speed detection from proximity switches and flow rate from turbine meter inputs down to 12 mV.

< More News

Comments are closed.