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SCA-BM

Product catalog summary

Mechanical Specifications
The SCA-BM encoder features a brass housing and electroplated steel cap, with an aluminum option for flat cables. The shaft is made of stainless steel. The encoder weighs approximately 40 grams, with the cable adding 50 grams per meter. It supports a shaft speed of up to 12,000 rpm and has a bearing life exceeding 1.9 x 10¹⁰ revolutions. The starting torque is less than 0.005 Nm at 25°C, and it can handle axial loads up to 10 N and radial loads up to 20 N.

Electrical Specifications
The encoder operates on a supply voltage ranging from 4.5 Vdc to 30 Vdc, with a maximum current of 35 mA without load. It provides incremental output with resolutions from 1 to 7500 pulses per revolution (ppr). The output format includes two-channel quadrature with an index and optional complementary outputs. It supports a frequency response of up to 200 kHz and offers various output options, including push-pull and differential line drivers. The device is protected against reverse polarity and output short circuits and complies with EMC standards EN61000-6-2:2005 and EN61000-6-3:2007.

Environmental Specifications
The operating and storage temperature range is -40°C to +85°C. It can withstand shocks of 100 G for 11 ms and vibrations from 10-2000 Hz at 10 G. The enclosure rating is IP 50 or IP 64 for flat cable options, and it can operate in up to 98% relative humidity without condensation.

Connection Options
The encoder offers standard and flat cable options, with differential and standard outputs. Cable lengths are available in 0.5 m, 1 m, or 2 m, with specific configurations for each type.

Ordering Code
The ordering code for the SCA-BM encoder includes specifications for pulses per revolution, output type, shaft diameter, shaft length, IP rating, cable length, and cable takeout. Additional options are available upon request, particularly for wind power applications.

Catalog excerpts

Automation / Mini Type SCA-BM Supply Voltage: Output Voltage: Output Current: Frequency Response: Output Format: Phase Sense: Electrical Specifications Mechanical Specifications Incremental 1 to 7500 ppr (pulses per revolution) 4,5 Vdc min. to 30 Vdc max. (35 mA max. - no load) Low: 500 mV max. at 10 mA High: (Vin – 0,6) at -10 mA (Vin – 1,3) at -25 mA 25 mA max. load per output channel 200 kHz max. Housing: Brass Cap: Electroplated Steel Aluminum (flat cable option) Shaft: Stainless Steel Encoder: ~ 40 gr (1,41 oz) Cable: 50 gr / meter (1,76 oz / meter) Bearing Life: > 1,9 x 1010 revolutions at rated load Shaft Speed: Starting Torque: Mass Moment of Inertia: Shaft Loads: Two channel (A, B) quadrature with Index (Z) and optional complementary (A-, B-, Z-) outputs A leads B clockwise (CW) from the mounting end of the encoder Environmental Specifications Operating Temp.: Gated with Channels A and B high Storage Temp.: ASIC Push pull and Differential OL7272 Push-pull and Differential Line Driver 26C31 Differential Line Driver 5V output (with 5V input) Reverse polarity and output short circuit protected Enclosure Rating: IP 50 / Nema 5 (approx.) IP 64 / Nema 4 (approx.) – flat cable Electrical Protection: Noise Immunity: Tested to EN61000-6-2 : 2005 (industrial environments) Electromagnetic compatibility (EMC) and EN 61000-6-3 : 2007 (residential, commercial, and lightindustrial environments) for Electromagnetic compatibility (EMC) Connection Options Cable: 8 leads (0,05 mm2, 30 AWG) - Differential 5 leads (0,14 mm2, 26 AWG) - Standard twisted pairs; shielded Flat Cable: 10 lead flat cable with IDC connector **= It is recommended, not to combine max. Value for all 3 parameters

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Type SCA-BM Output waveform Disk Resolutions (pulses per revolution) Other options on request Pulses per revolution, min. 1 – max. 7.500 Channel tolerance Phase difference tolerance Z channel tolerance Mechanical Dimensions

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Type SCA-BM Output Terminations Standard Cable Standard Output Channel A AB BZ ZVsup GND Flat Cable w/ IDC Connector Differential Output Wire Color Green NC Yellow NC Gray NC Brown White GND = Circuit Ground Differential Output * Position Pink Gray Green Yellow White Brown Red Blue * Hewlett Packard (HP) compatible mm (inches) mm (inches) mm (inches) IP 50 rating CE mark not available 0,5 m, 1 m, or 2 m cable length only

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Type SCA-BM Ordering Code Type SCA-BM Shaft Length Cable Length Cable Takeout Standard Standard – Open Collector NPN Standard – Open Collector PNP Differential 26C31 Line Driver OL 7272 Line Driver Standard - with built-in TSM ** Standard Cable Standard is 1 meter Specify length Flat Cable w/ IDC 0,5 meter Side (radial) Back (axial) Flat cable w/ IDC connector ** Designed specifically for Wind Power applications. Other options on request: Please contact Scancon A/S See SCA24 COC under Industries – Wind Power – SCA24 for additional conformity standards testing. TSM = Transient Suppression Module...

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