JUKI 40002235 HPJ-A21 Output Sensor Assembly for KE-2050 KE-2055 KE-2060 KE-2070 KE-2080

JUKI 40002235 HPJ-A21 Output Sensor Assembly for KE-2050 KE-2055 KE-2060 KE-2070 KE-2080

The JUKI 40002235 HPJ-A21 C.OUT Sensor Assembly is a compact photoelectric detection component designed for compatible JUKI KE-series SMT placement machines. The official parts description is commonly referenced as C.OUT SENS ASM, while HPJ-A21 identifies the photoelectric sensor model used in the assembly. JUKI maintenance documentation specifically identifies part number 40002235 as the C.OUT sensor assembly in the conveyor and stopper area.

The HPJ-A21 uses a limited diffuse scanning principle with an infrared LED, a nominal sensing distance of 30 +/- 5 mm, Light ON operation, and NPN open-collector output. Its compact construction makes it suitable for machine mechanisms where stable, repetitive, non-contact detection is required.

For SMT factories, equipment service companies, and maintenance departments, accurate identification by 40002235 + HPJ-A21 + machine model helps reduce incorrect replacement orders and unnecessary machine downtime.

During normal SMT production, the C.OUT sensor performs repeated detection cycles as PCBs move through the machine transport system. Long operating hours, contamination, vibration, cable stress, improper alignment, or physical damage may gradually affect sensing reliability.

Typical conditions that may require inspection or replacement include:

A sensor-related alarm does not always mean that the sensor itself has failed. The cable, connector, mounting position, PCB position, power supply, and machine input circuit should also be inspected before replacement.

JUKI's maintenance instructions for this assembly specifically require correct C.OUT sensor positioning and sensitivity adjustment so that a matte black glass epoxy PWB can be detected reliably.

When an existing C.OUT detection system becomes unstable, the replacement process should begin with accurate part identification rather than visual comparison alone.

The recommended identification information is:

JUKI Part Number: 40002235
Sensor Model: HPJ-A21
Part Description: C.OUT SENSOR ASM

Before replacing the sensor, maintenance personnel should inspect the sensing surface and remove contamination. Check that the mounting screws are secure and confirm that the PCB or detection target passes through the correct sensing area.

The sensor cable and connector should also be inspected for bending, pinching, looseness, or damaged insulation.

If replacement is necessary, installation should reproduce the original mounting position and cable routing. Sensitivity and detection operation should then be checked according to the applicable machine maintenance procedure.

This structured approach helps avoid unnecessary replacement and makes troubleshooting more efficient.

HPJ-A21 manufacturer documentation confirms the limited diffuse scanning method, 30 +/- 5 mm nominal sensing distance, 10.8 to 26.4 VDC supply, NPN output, infrared LED, Light ON operation, and maximum 1 ms response time.

Different sensors may be installed in the same transport mechanism. They should not be selected only by appearance.

JUKI maintenance documentation distinguishes the STOP sensor 40002214 from the C.OUT sensor 40002235, confirming that they are separate assemblies used at different detection positions.

Therefore, replacing 40002235 with another sensor assembly simply because the body looks similar is not recommended.

The 40002235 HPJ-A21 C.OUT Sensor Assembly is mainly used for detection within compatible JUKI KE-series SMT equipment.

Commonly referenced compatible machine models include:

• KE-2050
• KE-2055
• KE-2060
• KE-2070
• KE-2080

Supplier parts references also list these KE-series machines for the 40002235 HPJ-A21 assembly.

Typical application environments include:

Used as a replacement sensor when C.OUT detection becomes unstable or fails during PCB transportation.

Suitable for maintenance departments operating multiple SMT machines and maintaining commonly required electronic spare parts.

Helps restore machine detection functions during preventive maintenance or unplanned equipment repair.

Useful for field servicing, machine refurbishment, and troubleshooting of compatible KE-series equipment.

Because a small sensor can stop an entire machine sequence when it fails, many factories keep critical sensor assemblies available as maintenance stock.

The HPJ-A21 performs detection without direct mechanical contact.

First, the sensor emits infrared light toward its sensing area. When the intended target or PCB reaches the detection zone, reflected light returns to the receiving element.

The sensor's internal circuit evaluates the optical signal and changes its electrical output when the required detection condition is reached.

The HPJ-A21 operates in Light ON mode and uses an NPN open-collector output. The machine control system receives this signal and uses it as part of the programmed transport or positioning sequence.

The operating sequence can be summarized as follows:

This non-contact method reduces mechanical wear compared with a physical limit switch and supports fast repetitive detection in automated equipment.

Correct selection is particularly important because several JUKI sensor assemblies may have similar shapes.

The primary purchasing reference should be:

40002235

Do not order only according to the appearance of the sensor.

Check whether the installed sensor is marked:

HPJ-A21

Different HPJ-series models may have different sensing or output characteristics.

Provide the exact SMT machine model when requesting a quotation.

For example:

KE-2050 / KE-2055 / KE-2060 / KE-2070 / KE-2080

The required description should be:

C.OUT SENSOR ASM

Do not confuse it with IN SENSOR, OUT SENSOR, WAIT SENSOR, or STOP SENSOR assemblies.

For older machines, maintenance history may have resulted in modifications or previously substituted components.

A clear photograph showing the sensor label, connector, cable, and mounting position can help confirm compatibility before shipment.

Factories operating several KE-series machines may consider keeping one or more sensors in maintenance inventory to reduce downtime caused by international sourcing lead times.

Providing this information with the initial inquiry can shorten confirmation time and improve quotation accuracy.

The 40002235 is a C.OUT Sensor Assembly used to detect PCB or machine mechanism position in compatible JUKI SMT equipment. It sends an electrical detection signal to the control system so the related automatic sequence can continue correctly.

No. Part number 40002235 is the C.OUT SENSOR ASM, while 40002210 is a separate OUT SENSOR ASM. JUKI parts and maintenance references identify them as different assemblies, so buyers should confirm the exact part number before ordering.

HPJ-A21 is a limited diffuse photoelectric sensor with a nominal 30 +/- 5 mm sensing distance, 10.8 to 26.4 VDC supply, NPN open-collector output, infrared LED, Light ON operation, and maximum 1 ms response time.

Please provide part number 40002235, sensor model HPJ-A21, machine model, required quantity, and clear photographs of the existing sensor. Comparing these details is more reliable than selecting the replacement by appearance alone.

Yes. It is suitable for preventive maintenance inventory, emergency repairs, machine refurbishment, and service-company stock. Keeping critical sensors locally can help reduce production downtime when an installed unit requires replacement.

Need JUKI 40002235 HPJ-A21 C.OUT Sensor Assembly or other SMT machine spare parts?

Please send your part number, machine model, required quantity, and product photos for checking.

Multiple SMT spare-part numbers or complete BOM lists are also welcome. We can assist with product identification, availability checking, combined quotation, packaging requirements, and international shipment preparation for professional SMT maintenance and production requirements.