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Dynapar ACURO absolute encoders

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The Danaher Industrial Controls Group (DICG) announced an expansion of its Dynapar ACURO series of absolute encoders with two new models that incorporate the company’s new opto-ASIC technology platform. ACURO is already a market leader in several key performance metrics, such as communication compatibility, networking speed, high resolution, and lowest current draw, among others.

The application / function are as follows:
The new opto-ASIC platform extended throughout the ACURO line now provides advantages that make absolute encoder technology applicable to a wider range of motion control and servomotor feedback applications. The new ACURO 36 and ACURO 110 models extend the ACURO series to applications in the small motor, packaging and textile machinery, and medical equipment sectors.

Absolute encoders improve machine reliability because, unlike incremental encoders, they always know their position, even at startup or after a power failure. DICG technology and manufacturing breakthroughs have reduced the cost of absolute encoders, so that they are now finding acceptance in every kind of application, not just the high end, demanding few.

Broader range of sizes – Only 36mm in diameter, the new hollowshaft ACURO 36 encoder is more than a third smaller than previous models in the ACURO line. At 110mm, the new hollowshaft ACURO 110 encoder accepts shaft sizes up to 50mm. Both are available in motor drive or standard industrial versions.

Low-profile gears shrink size, increase reliability – The ACURO 36 is one of the few encoders that use a gearbox instead of a battery to provide multiturn resolution. The low-profile mechanical gearbox allows a lower installation height than battery-buffered counter solutions.

Thin as a dime, the gear set facilitates an installation depth of just 31 mm – one of the shortest in the industry. Small encoders are especially important to motor OEMs, who are under pressure to continually shrink their designs.

In addition, the gears eliminate dead batteries as a potential source of downtime, and eliminate the need for battery maintenance. Running at speeds up to 12,000 rpm, the gear set is nonmagnetic and immune to interference in such applications as welding or motors equipped with powerful brakes.

New OPTO-ASIC generation platform:
The ACURO 36 and ACURO 110 encoders are based on DICG’s new generation platform based on opto-ASIC electronics, into which multiple functions are highly integrated. ACURO was engineered for field dependability, re-designed from the predecessor’s 150 parts and five circuit boards to less than 30 parts and just one board. Reliability is enhanced by minimizing the number of printed circuit boards and soldered connections. The new electronics also enabled Danaher designers to increase the temperature specs on the motor drive version to an industry-leading 120 degrees C – ideal for today’s smaller, hotter running motors.

The ACURO Series has the lowest current draw of any absolute encoder, at just 45mA for the single-turn version and 85mA for the multiturn version.

The new platform is consistent across DICG’s manufacturing plants worldwide. Globally based companies are assured of receiving the same design encoder no matter which region it was manufactured in. This allows company managers to reduce costs through component standardization.

The most communications protocols -The ACURO Series encoders can communicate with any type of control system using common formats, ranging from parallel to such field buses as profibus, DeviceNet, CANopen, CAN Layer2 Interbus, and SSI.A 2048-step sine/cosine signal (1Vpp) is also available for dynamic control. No other encoder offers as many communication options.

Network speeds five times faster:
The ACURO Series was the first to use the new BiSS (Bidirectional Synchronous Serial Interface) protocol. This freely licensable, open-standard protocol supports networking speeds five times faster than proprietary encoder protocols. Using the BiSS protocol, engineers free themselves from restrictive, proprietary bus standards, and achieve data throughput up to 10Mbaud using standard drivers and cables longer than 50m.

As BiSS is all digital, it eliminates the added cost of A/D converters needed in drive systems that connect to encoders using proprietary protocols. BiSS is hardware-compatible with the SSI protocol, simplifying integration.

Differentiate features are:
High accuracy:
The ACURO 36 offers up to 12-bit multiturn and 22-bit single turn resolution – one of the highest accuracy encoders on the market. The ACURO 110 offers 17-bit single turn resolution. High resolution allows precise control of machine motion and increases machine reliability.

More diagnostics than any other encoders:
The new ACURO Series offers more built-in diagnostics and alarms to monitor current and temperature than any other encoder. Optical sensors internally monitor the amplitude of the encoder signals, and exceeding the limit values will result in warning messages. A single-step code check ensures that the encoder signal reflects the recorded turn, bit by bit. The internal signal processing function checks each individual increment for possible occurrence after the previous event. Any violation of this rule, possibly due to disk breakage or mechanical overload, will lead to an alarm.

In addition, a self-monitoring feature checks the operating hours and signals a warning message to initiate preventive maintenance. What’s more, the BiSS protocol can report operation information that can be used diagnostically, such as torque, temperature, and acceleration.

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Veeder Root-Meter Register

7887 Meter Register:
Designed for maximum readability – engineered for extra life in fuel deliveries and, fluid flow transactions of all kinds.
1. New crisp, high visibility digital display for optimum readability in all ambient lighting.
2. Latest technology, modern materials give maximum dependability at speeds to 250 rpm of right wheel.
3. Positive action knob reset.
4. Built-in precision totalizer accumulates up to 99,999,999 units.
5. Acetal resin components for smooth operation and extra long life.
6. Fits all popular flow meters.

Description:
The Meter Register is the outstanding choice for recording and displaying delivery data in a wide variety of industries. In the petroleum refining and distribution field, it is used from the well to pipelines and storage centers, then to gasoline and fuel oil delivery trucks. In the chemical processing field, it can be used for displaying totals during mixing and batching operations.

The 7887 Meter Register totalizes and displays high speed deliveries and transactions in large easy-to-read figures. Ideal for increased efficiency in all kinds of liquid inventory and delivery operations. Utilizing a geared drive available in a wide selection of ratios, the Meter Register records in practically any unit of liquid measure – gallons, liters, barrels, etc. – as well as non-liquid units.

Special optional adaptors are available to mate the Meter Register with all standard meters and pumps. It also easily combines with Veeder-Root Meter Preset and Printer to form a complete count, control and print system.

Finished in corrosion resistant epoxy, the sturdy housing protects the Meter Register in demanding environments and extremes in weather.

Example: Veeder-Root 7887 Meter Register & 7889 Preset fitted to TCS-700 Series Flowmeter.

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TC-003 Analog to Pulse Temperature Tramsmitter

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Hockey Puck Style:
The TC-003 Digital RTD Temperature Transmitter is a unique device designed to transmit the temperature measured by a PT100 RTD sensor to a PLC digital input. Although it requires only one normal digital 24VDC input on the PLC, it provides an accurate temperature measurement for use in the PLC program.

It is packaged in a standard ANSI 2”, 50mm “hockey-puck” to be installed in the head of normal industrial temperature probe assembly. The TC-003 transmitter is connected to the normal PT100 RTD.
It measures the resistance of the PT100 RTD and then calculates the corresponding temperature. It then outputs the measurement as a low speed serial pulse train to a standard PLC digital input. The PLC receives 16 bits of data in a format ready to load into a 16 bit data register. The

PLC register ends up containing the value of the measured temperature in degrees C x 10. For example if the measured temperature is -5°C the transmitted data will be -50, and if the measured temperature is +10°C the transmitted data will be 100.

Is it compatible?
The PLC digital input does not need to be a high speed or counter type input. Any normal 24VDC digital input is suitable. The rate of data transmission is selected to allow non-time critical operation of the receiving PLC. The shortest pulse time is 100mS, so the PLC needs
to have a maximum scan time of 50mS. This is normally very easy to achieve. A small section of ladder program collects and interprets the pulses in sequence and loads a register with the measured temperature value. There is no particular limit to the number of TC-003 transmitters that can be used with a single PLC. It depends only on the number of inputs and program and data memory available.

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TWK-Inductive Linear Transducers

Inductive Linear Transducers for engineering and instrumentation.

The half-bridge technology for 1 to 360 mm stroke. The wide range of inductive linear transducers includes items with 10, 12 and 25 mm outside diameter and for measuring ranges from 1 to 360 mm. The smaller IW 10 and IW 120 series require external electronic modules for excitation and signal conditioning. IW 250 series with 25 mm housings have integral electronics consisting of oscillator, demodulater and amplifier. Analogue output signals are either 0(4) to 20 mA, 0 to 10 VDC or ± 10 VDC for full range or calibrated strokes. The transducers are completely potted to meet protection grades up to IP 68. Electrical connection is made either by leads, plug and socket or through cable glands. Various mechanical configurations are available to suit specific mounting conditions.

The IW 260 displacement transducers operate according to the new principle of fractional inductivity allotment within the hollow coil. Depending on the position of the core the inductivity changes within the corresponding coil section. This kind of layout provides for more position data than the classical half-bridge or LVDT configuration. An integral electronic circuit transforms these data into a signal proportional to the displacement of the plunger core.

The electronic circuit contains an oscillator, a demodulator, an amplifier and in some cases a current output source. Its SMD-design is short-circuit proof and protected against reverse polarity. The sensor system is completely sealed within a non-corrosive steel case to ensure positive protection against vibration, shock, humidity, oil and corrosive matter.

The new principle of fractional inductivity allotment as described above brings about an outstanding increase of the measuring stroke. In comparison to the IW 250 model the useful range of the IW 260 model increases by 70 to 100% based on the same length of the case.

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