Introduction to CELESCO PT801-0005-611-1111
Product Description
The CELESCO PT801-0005-611-1111 is a precision-engineered string potentiometer (draw-wire sensor) tailored for linear position measurement in demanding industrial settings. Building on the reliability of the PT801 series, this model is optimized for applications requiring consistent performance in dynamic environments, such as robotic arm positioning, material handling equipment, and hydraulic system feedback across automotive, aerospace, and manufacturing industries.
Like its counterparts, it operates on the draw-wire principle: a high-tensile stainless-steel cable extends from a spring-loaded spool, with its free end attached to the moving object. Linear displacement of the object causes the cable to unwind or retract, rotating the spool and translating motion into a proportional electrical signal via an integrated transducer. The PT801-0005-611-1111 is distinguished by its specialized electrical connector and enhanced compatibility with legacy control systems, making it a versatile choice for both new installations and retrofits.
Technical Parameters
- Measurement Range: 5 inches (127 mm) full scale
- Output Signal: 4-20 mA analog current loop (two-wire)
- Accuracy: ±0.1% of full scale (encompassing linearity, hysteresis, and repeatability)
- Resolution: Effectively infinite (analog output), limited by signal conditioning to ~0.01% of range
- Operating Temperature Range: -40°C to +85°C (-40°F to +185°F)
- Cable Specifications: 0.018-inch diameter stainless steel; maximum extension speed 10 ft/s (3 m/s)
- Spring Return Torque: 1.5 oz-in (1.06 N-cm) at full extension
- Electrical Connections: 11-pin circular connector (industry-standard mating part required)
- Power Supply: 10-30 V DC (typically 24 V DC)
- Current Consumption: ≤ 25 mA (including load)
- Environmental Protection: IP67 (housing and cable exit); NEMA 6
- Shock Resistance: 1000 g peak (11 ms duration, half-sine)
- Vibration Resistance: 20 g (10-2000 Hz)
- Weight: Approximately 1.1 lbs (0.5 kg)
- Mounting: Two M5 threaded holes (recommended torque 8 in-lbs)
Usage Methods
- Installation:
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- Secure the sensor to a fixed structure using the M5 mounting holes, ensuring alignment with the moving object’s path to minimize cable side loading.
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- Attach the cable’s swivel connector to the target object, maintaining a straight line between the sensor and attachment point to prevent cable wear.
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- Allow 1-2% cable slack to avoid tension at the minimum position.
- Wiring:
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- Connect the 11-pin circular connector to a compatible mating part (e.g., industry-standard 11-pin receptacle).
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- Wire the 4-20 mA output to the control system: positive lead to the analog input, negative lead to the system common (0 V).
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- Apply 10-30 V DC power, verifying polarity to prevent damage.
- Calibration:
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- Confirm output at extreme positions: 4 mA (0 inches) and 20 mA (5 inches).
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- Use the controller’s tools to adjust for offset/gain errors if needed.
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- Perform a full-range test to validate linearity.
- Maintenance:
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- Inspect the cable quarterly for damage (fraying, kinks) and replace if compromised.
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- Clean the cable with a dry cloth to remove debris.
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- Check mounting hardware annually for tightness, especially in high-vibration areas.
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- Avoid exposure to temperatures outside -40°C to +85°C.
System Introduction
The CELESCO PT801-0005-611-1111 serves as a critical position feedback component in closed-loop systems, integrating three key layers:
- Mechanical Interface: The draw-wire assembly converts linear motion of the target object into rotational motion of the spool.
- Sensing Layer: A transducer converts spool rotation into a 4-20 mA signal, with current proportional to displacement (4 mA = 0 inches, 20 mA = 5 inches).
- Control Integration: The analog signal is transmitted to a PLC/DCS, which uses the data to adjust actuators (e.g., motors, valves) and maintain desired positions.
In a typical application, such as monitoring a robotic arm’s linear extension, the sensor provides real-time position data. The 4-20 mA signal enables the controller to adjust motor speed, ensuring precise movement and preventing overshoot, critical for tasks like assembly line part placement.
Related Models in the Series
- PT801-0010-611-1111: 10-inch (254 mm) range with 11-pin connector, suited for longer displacements.
- PT801-0005-613-1111: 5-inch range with 0-10 V output and 11-pin connector, for voltage-based systems.
- PT801-0005-621-1111: 5-inch range with RS485 (Modbus RTU) and 11-pin connector, ideal for networked setups.
- PT850-0005-611-1111: Heavy-duty 5-inch model with 2000 g shock resistance and 11-pin connector, for extreme environments.
- PT801-0005-611-1122: 5-inch range with extended 11-pin cable (10 ft) for remote mounting.
- RT900-0005-611-1111: Rotary variant (0-360°) with 11-pin connector, matching electrical specs for angular measurement.
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