Product Description
KN40 incremental photoelectric encoder (hollow shaft) is an ultra-thin multi-shaft encoder with compact structure and miniaturization, which is widely used in servo motors and industrial automation fields.
Product Features |
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Product parameters
Project | Parameter | ||||
Dimensions | Outer diameter: 50mm | ||||
Thickness: 30mmm | |||||
Shaft diameter:8mm/10mm/12mm/14mm/15mm | |||||
Pulse | 9;20;30;50;60;100;200;240;250;256;300;360;450;500;512;600;700;800;900;1000;1024;1200;1250;1440; | ||||
Reverse polarity protection | √ | ||||
Short circuit protection | √ | ||||
Output phase | Phase A,B,Z,A-,B-,Z- | ||||
Output mode | Radial Cable & Axial Cable | ||||
Protection level | IP50 & IP65 | ||||
Output type | N - Open Collector (NPN) | V - voltage output | F-Push-pull output | TTL | HTL |
Maximum response frequency | 100KHZ | 200KHZ | 300KHZ | ||
Starting torque | 9.8x10-3N·m (100gf.cm)or less | ||||
Moment of inertia | 6.5x 10-6kg·m2 or less | ||||
Axis allowable force | Radial force 40N; axial force 20N | ||||
Maximum allowable speed | <4000rpm;IP65≤3000rpm; | ||||
Ambient temperature | Working: -20 to +90°; Storage: -25 to +95° | ||||
Ambient humidity | 35-85%RH (no condensation) during operation and storage | ||||
Vibration (durability) | Amplitude 0.75mm, 5-55Hz, 2 hours in each of the three axes | ||||
Impact (durability) | 980m/s2 ，11ms,Three times in each direction | ||||
Casing | Die-cast aluminum alloy | ||||
Line length | 1000mm | ||||
Packing method | Paper Box | ||||
Weight | 200g | ||||
Certificate | CE/ ISO9001 | ||||
Instructions
1. Selection guide
Model composition (selection parameters)
KN40- | J | 6 | C | 1024 | B8 | － | 000 | |||||||||
↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ||||||||
Series | Connection interface: |
| Electrical interface: | Resolution PPR:
| Shaft diameter | Supply voltage: H=DC8-30V | Special requirement: | Management |
Notes:
①Z phase signal is valid at low level.
②Z phase signal is valid at high level.
③None means IP40, cable length is 0.5M, if you need to change the length, C+number, the maximum length is 100M (indicated by C100)
2. Output mode
2.1 Incremental signal
2.2 Dedicated to servo motor (with U.V.W)
3. Electrical parameters
Project | Output method | ||||||
OC | Voltage | Push-pull | TTL | HTL | |||
Supply voltage | DC+5V±5% ; DC8-30V±5% | DC+5V±5% | DC8-30V±5% | ||||
Current consumption | 100mA Max | 120mA Max | |||||
Allowable ripple | ≤3% rms | ||||||
Maximum response frequency | 100KHz | 300KHz | 500KHz | ||||
Output capacity | Output | Inflow | ≤30mA | Load resistance 2.2K | ≤30mA | ≤±20mA | ≤±50mA |
Outflow | — | ≤10mA | |||||
Output | "H" | — | — | ≥[(power supply voltage)-2.5V] | ≥2.5V | ≥Vcc-3 VDC | |
"L" | ≤0.4V | ≤0.7V(20mA or less) | ≤0.4V（30mA） | ≤0.5V | ≤1 VDC | ||
Load voltage | ≤DC30V | — | — | ||||
Rise and fall time | 2us or less (wire length: 2m) | ≤100ns 1μs or less (wire length: 2m) | |||||
Insulation withstand voltage | AC500V/60s | ||||||
Insulation impedance | 10MΩ | ||||||
Duty cycle | 45%~55% | ||||||
Reverse polarity protection | ✔ | ||||||
Short circuit protection | — | ✔① | |||||
A.B Phase Difference | 90°±10° (at low frequency) | ||||||
90°±20° (at high frequency)） | |||||||
Shielded wire | Encoder body not connected | ||||||
Note: ① Short circuit with another cable or GND, the maximum allowed time is 30 seconds | |||||||
4. Mechanical specifications
Project | Parameter |
Shaft diameter | Φ8mm, Φ10mm, Φ12mm, Φ14mm, Φ15mm (optional) |
Shaft material | Stainless steel |
Starting torque | 9.8×10⁻³ N・m or less |
Moment of inertia | 6.5×10⁻⁶ kg・m² or less |
Allowable shaft force | Radial 40N; Axial 20N |
Maximum allowable speed | <4000rpm; |
Bearing life | Rated load 1.5×10⁹, 100,000 hours at 2500RPW |
Housing | Aluminum alloy |
Weight | Approx. 200g |
5. Environmental parameters
Project | Parameter |
Ambient temperature | Operating: -20~+90°C (repeated bending cable: -10°C); Storage: -25~+95°C |
Ambient humidity | Operating/Storage: 35~85% RH (non-condensing) |
Vibration (durability) | Amplitude 0.75mm, 5~55Hz, 2h each in three axes |
Shock (durability) | 490m/s², 11ms, 3 times each in X/Y/Z directions |
Protection level | IP50 & IP65 |
6.1 OC/voltage/push-pull (Table 1)
Supply voltage | Incremental signal | ||||
Line color | Red | Black | White | Green | Yellow |
Function | Up | OV | A | B | Z |
6.2 TTL/HTL (Table 2)
Supply voltage | Incremental signal | |||||||
Line color | Red | Black | White | White / Black | Green | Green/Black | Yellow | Yellow/Black |
Function | Up | OV | A+ | A- | B+ | B- | Z+ | Z- |
Twisted Pair | |  | | | ||||
Supply voltage | Incremental signal | |||||||
Line color | Red | Black | White | White / Black | Green | Green/Black | Yellow | Yellow/Black |
Function | Up | OV | A+ | A- | B+ | B- | Z+ | Z- |
Twisted Pair | | | | | ||||
*For the functional status in wire saving mode, refer to the functional mode wiring table of the output circuit.
6.4 Dedicated for servo motor (Table 4)
Supply | Incremental signal | |||||||||||||
Line color | Red | Black | White | White / | Green | Green/ | Yellow | Yellow/ | Blue | Blue/ | Gray | Gray/ | Pink | Pink/ |
Function | Up | OV | A+ | A- | B+ | B- | Z+ | Z- | U+ | U- | V+ | V- | W+ | W- |
Twisted Pair | | | | | | | | |||||||
Up = power supply voltage.
The shielded wire is not connected to the internal circuit of the encoder.
Cable Connection
7. Basic dimensions
8. Installation shaft requirements
9. Accessories (installation spring plate optional)
Technological Innovation
Product Display
Ultra-thin and compact design:
40mm diameter, 20mm thickness,
suitable for space-constrained scenarios
Multi-axis adaptation:
hollow shaft design, shaft diameter up to 10mm,
supports blind hole/through/tapered shaft types
High-resolution feedback:
up to 40,000 PPR, non-contact photoelectric principle ensures accuracy
Multiple electrical protections:
reverse polarity, short circuit protection, improve system stability
Multiple interface compatibility:
supports TTL/HTL/push-pull and other electrical interfaces, adapting to different controllers
Industrial protection:
IP40 protection level, anti-vibration/shock, adaptable to complex environments
Lightweight design:
weighs only 90g, aluminum alloy shell takes into account both strength and portability
Quality Control
The quality of encoders is directly related to the stability and reliability of industrial automation systems. We have built a full-process quality control system, strictly screening suppliers from raw material procurement to ensure that the performance of core components meets standards; in the production process, we use high-precision equipment and standardized processes, and cooperate with online detection technology for real-time monitoring; in the finished product stage, we conduct rigorous tests such as high and low temperature, electromagnetic compatibility, and life aging to eliminate performance risks. Each encoder has passed multiple quality inspection levels, and its excellent quality has laid a solid foundation for intelligent manufacturing, providing customers with long-term and stable use guarantees.
Application Cases
With its ultra-thin and compact design and multiple shaft types (maximum shaft diameter 10mm), the KN40 series encoders achieve precise angle feedback in the servo motor field through non-contact photoelectric principles and a maximum resolution of 40,000PPR. In subway and elevator scenarios, its reverse polarity/short-circuit protection function improves system stability. In the CNC field, a variety of electrical interfaces are compatible with different controllers, supporting high-precision positioning of tools, and the miniaturized structure saves installation space to meet the compact requirements of automation equipment.
Service
I. Precautions for using the encoder
Places where the ambient temperature does not exceed the storage temperature; places where the relative humidity does not exceed the storage humidity; places where the temperature changes sharply and fogging occurs; places close to corrosive gases and flammable gases; places away from dust, salt, and metal powder; places where water, oil, and medicines are used; places where excessive vibration and impact will be transmitted to the body
II. Precautions for installing the encoder
Electrical components must not be subjected to overvoltage and other phenomena. Please conduct an electrostatic assessment of the setting environment, etc. Do not bring the motor power line close to the encoder; the FG line of the motor and the FG of the mechanical device must be reliably grounded; due to shielding The wire is not connected to the encoder body. Please make sure that the shielded wire is effectively connected to the ground at the user end.
III. Precautions on wiring
When used under the specified power supply voltage, please pay attention to the power supply voltage amplitude drop caused by the long wiring; please do not use the encoder wire and other power wires in the same pipe or bundle them in parallel; please use twisted pair wires for the signal wire and power wire of the encoder wire; please do not apply excessive force to the encoder harness, there will be a risk of disconnection
IV. About encoder warranty
Within twelve months after purchasing our company's products, users can get free warranty when they use them correctly according to the instructions,warning signs and other precautions and cause failures.
The following situations will be charged even during the warranty period: (freight is at your own expense)
1. Failures and damages caused by the user falling to the ground during transportation and handling, improper installation;
2. Failures of this product caused by the machine connected to it;
3. Failures and damages caused by fire, salt water, corrosive gas, abnormal voltage and other natural disasters such as earthquakes, thunder, wind, floods, etc.;
4. Repairs, adjustments, and modifications without the permission of our company (labels are not there or the outer cover is disassembled by yourself).
5. Failures that occur when the product is not used in accordance with the instructions and precautions in the instruction manual.
6. Except when other agreements are signed with the customer.
