The ASS40K-12 is an older encoder model that has become increasingly difficult to purchase in recent years. Many users in the heavy industrial field have reported sourcing challenges for this model. To solve these issues, we provide a fully compatible 1:1 customized replacement solution for the ASS40K-12 encoder. Our product replicates the original mechanical dimensions, electrical interface, and signal output, ensuring seamless integration with existing systems. The entire manufacturing process is optimized for speed, allowing us to deliver replacement units in a very short lead time. This helps reduce machine downtime and ensures continued stable performance for customers who depend on this encoder in production environments.

In terms of application, the ASS40K-12 encoder is well-known for its reliability in harsh industrial environments such as steel plants, metallurgical equipment, and crane systems. Over the past few years, our customized replacement solution for the ASS40K-12 has been successfully applied in the Middle East, Russia, Southeast Asia, Indonesia, and South America. These markets have strong demand for heavy-duty encoders capable of long-term operation in high-temperature, high-vibration, or high-dust conditions. Customer feedback confirms that our replacement version performs with consistent precision, strong durability, and excellent compatibility, making it a reliable alternative to the original product.

Replacement solution reference image.

ASS40K-12 Heavy-Duty Absolute Encoder Replacement Solution-LinkChina
ASS40K-12 Heavy-Duty Absolute Encoder Replacement Solution-LinkChina

Technical data

1. Connection data

ParameterDetails
Supply voltage12…30 V DC
No-load power consumptionapprox. 1 W
Resolution singleturnMax. 16 bit (65536 steps per revolution) see type plate
Resolution multiturn12 bit (4096 revolutions) see type plate
Data formatSSI, binary/gray code (see type plate)

2. SSI-Interface

ParameterDetails
Clock inputRS 422 / 5V
Input current5 mA
Clock frequency80kHz…1 MHz
Clock rate/transmission25 / 13 (multiturn / singleturn)
SSI-time out> 30 μs (without data repetition) < 20 μs (with data repetition)
Data interfaceRS 422 / 5V

3. Control signals

ParameterDetails
V/IR, Z (input)5…30V / 5mA
State (output)HTL
Temperature range-25°C…+85°C; For UL and CSA -25°C…+70°C

4. Degree of protection according to DIN EN 60529

Degree of protectionSealingMech. permissable speedRotor moment of inertiaBreakaway torque
IP 66with Labyrinth seal≤6000 rpmapprox. 580 gcm²approx. 6 Nm
IP 66 / IP 67with axial shaft seal≤4000 rpmapprox. 510 gcm²approx. 8 Nm
IP 66 / IP 67With radial shaft seal (for special applications, e.g. wet areas in rolling mills)≤3000 rpmapprox. 510 gcm²approx. 9 Nm

5. Vibration resistance, shock resistance and shaft load

ParameterStandardValue
Vibration resistanceDIN EN 60068-2-6 / IEC 68-2-6 (10 … 2000 Hz)20 g (=200 m/s²)
Shock resistanceDIN EN 60068-2-27 / IEC 68-2-27 (6 ms)150 g (=1500 m/s²)
Max. encoder shaft load-Fₐ, max. (axial) = 100 N; Fᵣ, max. (radial) = 120 N

6. Shaft dimensions

ParameterDetails
Shaft dimensions11j6 x 30 mm (standard); 14j6 x 30 mm (optional)

7. Weight

ParameterTypeDetails
WeightType K (construction type B5)approx. 3.1 kg
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