BES58-P0CA0P-CD0H3PB0 Absolute Encoder 85409
The BES58-P0CA0P-CD0H3PB0, order code 85409, is a heavy-duty multiturn absolute encoder from the BES58 series. It provides absolute position data even after power loss, eliminating the need for referencing on startup. This encoder is widely used in crane systems, wind turbines, and packaging machines.
Resolution and Interface
Singleturn resolution: 16 bits (65536 steps per revolution). Multiturn resolution: 14 bits (16384 revolutions). Total resolution: 30 bits. The output interface is synchronous serial interface (SSI) with 25- or 26-bit frame format, selectable via configuration. Data transmission baud rate up to 1 MHz. Additional outputs include a complementary SSI clock and a zero pulse (optional).
Mechanical Specifications
Shaft type: solid shaft with 10 mm diameter and 20 mm length (with keyway). Flange mounting: synchro flange with 60 mm pilot diameter (clamp or anti-rotation pin). Housing material: anodized aluminum. Shaft material: stainless steel. Maximum mechanical speed: 6000 rpm. Starting torque: < 0.03 Nm at 20°C. Rotor moment of inertia: 50 gcm². Protection class (housing): IP67, shaft seal: IP64.
Electrical Parameters
Supply voltage: 10 to 30 V DC (reverse polarity protected). Current consumption: max 100 mA (no load). Output driver: RS-422 compatible. Clock input: opto-isolated, max 1 MHz. Update rate: 50 µs per position request. EMC immunity according to EN 61000-6-2, emission to EN 61000-6-4. Shock resistance: 200 g (6 ms). Vibration: 20 g (10–2000 Hz).
Configuration and Diagnostics
The encoder is factory preset with binary code (Gray code optional). An internal EEPROM stores the zero point offset and counting direction. A diagnostic LED blinks green for normal operation, red for internal error (e.g., overvoltage or light source failure). The SSI interface also transmits warning bits (e.g., temperature warning at >85°C).
Typical Applications
Due to its robust IP67 rating, it is used in outdoor gantry cranes, solar trackers, and hydraulic presses. The multiturn feature ensures accurate positioning after mechanical transmission through gearboxes. The encoder works with Siemens, Rockwell, and Beckhoff PLCs that support SSI master modules.
