CALT GHS38 Series
CALT GHS38 Series 1024P/R Rotary Encoder Instruction Manual
Model: 1024P/R Shaft 6mm ABZ 3 Channels Open Collector Output 5 to 26V Rotary Encoder
1. Product Overview
The CALT GHS38 Series Rotary Encoder is a compact and high-quality incremental encoder designed for precise rotational position and speed sensing in various industrial applications. This specific model features 1024 pulses per revolution (P/R), a 6mm shaft, and provides ABZ 3-channel open collector output compatible with 5 to 26V power supplies. Its robust design ensures reliable performance in diverse environments.
- Output Type: NPN open collector output.
- Resolution: 1024 pulses per revolution (P/R).
- Dimensions: 38mm outer diameter, 6mm shaft.
- Features: Easy installation, multiple application compatibility, cost-effective, light weight, small size, compact, and high quality.
2. Setup and Installation
Proper installation is crucial for the accurate and reliable operation of the rotary encoder. Follow these steps for mechanical mounting and electrical wiring.
2.1 Mechanical Mounting
Mount the encoder securely to the rotating shaft of the equipment. Ensure the encoder shaft is properly aligned with the equipment's shaft to prevent stress on the bearings. Use the provided mounting holes for stable attachment. Avoid excessive force during installation to prevent damage to the encoder shaft or internal components.
Figure 1: Top view of the CALT GHS38 Rotary Encoder with its connected cable, highlighting the shaft and mounting points.
2.2 Electrical Connections
Connect the encoder to your control system according to the wiring diagram below. This model features an NPN open collector output. Ensure the power supply voltage is within the specified range of 5 to 26V DC.
Figure 2: CALT GHS38 Rotary Encoder with its cable, illustrating the complete unit.
Wiring Diagram (Open-Collector Output):
| Signal | Color |
|---|---|
| A | Green |
| B | White |
| Z | Yellow |
| Vcc | Red |
| GND | Black |
Note: For models with inverted signals (A-, B-, Z-), refer to the product label for specific wire colors.
3. Operating Principles
The CALT GHS38 Series Rotary Encoder generates digital pulses corresponding to rotational movement. It provides three output channels: A, B, and Z.
- A and B Channels: These channels output square waves that are 90 degrees out of phase with each other. This phase difference allows for the determination of both rotational direction and speed.
- Z Channel: This channel provides a single pulse per revolution, serving as a reference or home position marker.
The NPN open collector output requires an external pull-up resistor connected to the Vcc line for proper signal detection by your control system (e.g., PLC, microcontroller). When the output transistor is 'ON', it pulls the output line to ground (low voltage). When 'OFF', the external pull-up resistor pulls the output line to Vcc (high voltage).
4. Maintenance
The CALT GHS38 Series Rotary Encoder is designed for durability and requires minimal maintenance. Adhering to these guidelines will help ensure its longevity and performance.
- Cleaning: Keep the encoder's exterior clean. Use a soft, dry cloth to wipe away dust and debris. Avoid using harsh chemicals or abrasive materials that could damage the housing or labels.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges. Protect the encoder from direct exposure to excessive moisture, corrosive substances, or extreme temperatures.
- Shaft and Coupling: Periodically inspect the shaft and any coupling for signs of wear, damage, or misalignment. A damaged or misaligned shaft can lead to inaccurate readings or premature bearing failure.
- Cable Integrity: Check the cable for any cuts, abrasions, or signs of strain. Ensure cable glands are tight to maintain environmental protection.
- Avoid Impact: Protect the encoder from physical impact, which can damage internal components or affect calibration.
5. Troubleshooting
If you encounter issues with your rotary encoder, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| No output signal | Incorrect wiring; No power supply; Damaged cable; Faulty encoder. | Verify wiring against diagram; Check power supply voltage; Inspect cable for damage; Test encoder with known good setup. |
| Inaccurate or erratic counts | Loose mechanical coupling; Electrical noise/interference; Incorrect signal processing; Encoder damage. | Secure mechanical connection; Use shielded cables and proper grounding; Check controller's input settings; Inspect encoder for physical damage. |
| Incorrect direction detection | A/B phase wiring reversed; Controller logic error. | Swap A and B channel wires; Review controller's direction detection logic. |
| Intermittent signal loss | Loose connections; Vibration; Cable fatigue. | Tighten all connections; Reduce vibration if possible; Replace damaged cable. |
6. Specifications
Detailed technical specifications for the CALT GHS38 Series Rotary Encoder.
6.1 General Specifications
- Manufacturer: CALT
- ASIN: B01DIO6882
- Date First Available: March 28, 2016
- Item Weight: 10.6 ounces (approx. 300g)
- Package Dimensions: 3.94 x 3.94 x 3.15 inches (approx. 10 x 10 x 8 cm)
6.2 Electrical Specifications (Open-Collector Output)
| Parameter | Value |
|---|---|
| Supply Voltage | 5-26V |
| Current Consumption | ≤80mA |
| Load Current | 40mA |
| Output High | Min Vcc*70% |
| Output Low | MAX 0.4V |
| Rise Time Tr | MAX 1us |
| Fall Time Tf | MAX 1us |
| Highest Frequency Response | 300kHz |
6.3 Mechanical Specifications
| Parameter | Value |
|---|---|
| Max Speed r/min | 3000 |
| Starting Torque | <0.05Nm |
| Axis Maximum Load (Radial) | 25 N |
| Axis Maximum Load (Axial) | 15 N |
| Impact Resistance | 50G/11ms |
| Anti-vibration | 10G, 10-2000Hz |
| Moment of Inertia | 4 x 10^-5 kgm² |
| Work Temperature | -30~85°C |
| Storage Temperature | -35~85°C |
| Protection Degree | IP65 |
| Weight | 100g |
6.4 Dimensions
The encoder has an outer diameter of 38mm and a shaft diameter of 6mm. Detailed dimensional drawings are available in the product documentation or can be requested from CALT support.
Figure 3: CALT GHS38 Rotary Encoder shown with a coin for visual size reference.
7. Product Images
Side view of the CALT GHS38 Rotary Encoder, highlighting the cable entry point and overall compact design.
The CALT GHS38 Rotary Encoder shown within its protective cardboard packaging, ready for shipment or storage.
8. Product Video
This video provides a visual overview of the GHS38 series Rotary Encoder, demonstrating its physical appearance and key features. It showcases the encoder from various angles, offering a better understanding of its design and construction.
9. Warranty and Support
For warranty information, technical support, or any inquiries regarding the CALT GHS38 Series Rotary Encoder, please contact CALT customer service or visit the official CALT website. Ensure you have your product model number and purchase details available for faster assistance.
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