Catalog excerpts
ABSOLUTE POSITION ROTARY ELECTRIC ENCODER HARSH ENVIRONMENT The DF-150 is a member of the DF series of Electric Encoders™, based on Netzer precision proprietary technology. The Electric Encoder™ offers many advantages - some unparalleled • Low profile (13 mm) • Hollow, floating shaft • No bearings or other contacting elements • High resolution and precision • High tolerance to temperature extremes, shock, moisture, EMI, RFI and Magnetic fields • Low weight DATA SHEET The Electric Encoder™ is unique in being holistic, i.e., its output reading is the averaged outcome of the whole area of the rotor, This feature makes the Electric Encoder™ forgiving to mounting tolerances, mechanical wander etc. The absence of components such as ball bearings , flexible couplers, glass disc, light sources and detectors, along with very low power consumption makes the Electric Encoder™ virtually failure free. The internally shielded, DC operated Electric Encoder™ includes an electric field generator, a field receiver, a sinusoidal shaped dielectric rotor, and processing electronics. The output signals of Electric Encoder™ are analog Sine / Cosine representing the rotation angle. The digital outputs are obtained by further processing - which may be either internal or external to the encoder. • Holistic signal generation • Digital interfaces The combination of precision, low profile, low weight and high reliability have made Netzer Precision encoders particularly suitable to a wide variety of critical applications including, but not limited to medical equipment and aerospace. Angular resolution Maximum tested static error Extended accuracy static error Maximum operational speed Measurement range Unlimited rotation Supply voltage Rotation direction Adjustable CW/CCW* Shielded cable Cable length * Default same direction from bottom side of the encoder Allowable axial mounting tolerance ±0.1 mm Operating temperature range Rotor inertia Storage temperature Total weight Relative humidity Outer Ø /Inner Ø/ Height Shock endurance Material (stator, rotor) DF-150-V02 Allowable mounting eccentricity Vibration endurance Nominal air gap (stator, rotor)
Open the catalog to page 1ABSOLUTE POSITION ROTARY ELECTRIC ENCODER HARSH ENVIRONMENT SSi / BiSS Output signal parameters Binary Differential RS-422 Clock frequency Position update rate (Max) Current consumption Power supply Pause time Monoflop time Time between 2 adjacent requests Tr > n*T+26 μsec Warn. Error fr=1/Tr Data request frequency Electric Encoder™ Default Length Period during which the encoder calculates the absolute position, one clock cycle Encoder signal for “start” data transmit “start” bit follower Absolute Position encoder data Warning Error The CRC polynomial for position, error and warning data...
Open the catalog to page 2ABSOLUTE POSITION ROTARY ELECTRIC ENCODER HARSH ENVIRONMENT Ordering Code DF - 150 - 32 - S G DF Product line Cable: 30 AWG twisted pair (3) :2 (30 AWG 25/44 finned copper, 0.15 PFE to Ø0.6 ± 0.05 OD). Temperature rating: -60 to +150 Deg C. Braided shield: Thinned copper braided 95% min. coverage. Jacket: 0.45 silicon rubber jacket Ø3.45 ±0.2 OD 0 250mm Flying leads (default) 2 750mm Flying leads (default) Braided shield 3 1000mm Flying leads (default) S Shielded cable 250 mm (default) Gray / Blue Green / Yellow 30 AWG single insulated wire 1 500mm Flying leads (default) DATA SHEET Cable...
Open the catalog to page 3ABSOLUTE POSITION ROTARY ELECTRIC ENCODER HARSH ENVIRONMENT DATA SHEET Unless Otherwise Specified Dimensions are in: mm
Open the catalog to page 4ABSOLUTE POSITION ROTARY ELECTRIC ENCODER HARSH ENVIRONMENT DATA SHEET Unless Otherwise Specified Dimensions are in: mm
Open the catalog to page 5