EUCHNER Handheld Operating Unit and Electronic Handwheel Field Troubleshooting Guide

Selection switch: Different gear switch units (such as 097029 five gear gray code, 097033 twelve gear gray code) and matching knobs (097141 black) can be ordered separately. When replacing, pay attention to the "disconnect before closing" or "short-circuit" characteristics of the switch, which must be consistent with the original design. C

Chapter 4: Key Points for Installation, Wiring, and Debugging

4.1 Handheld Box Holder Matching

EUCHNER offers dedicated hangers: HBA hangers are available in gray (072828) and black (100221), as well as gray (072935) and black (109979) with large handwheel slots. HBM hanger (112335), HBL hanger (084397). The hanger is fixed to the machine control panel or wall by screws. Choosing the wrong hanger can result in the handwheel not being able to rotate freely in the hanger or being difficult to retrieve and place.

4.2 Correspondence between plugs and sockets

Handheld box connector pin number device side flange socket (with short-circuit plug) matched with cable plug

12-pin 086749 086748

23-pin 074384 074393

28-pin 074385 074394

35-pin 074386 074395

When the device is not in use, the short-circuit plug needs to be inserted into the flange socket for sealing (such as the 103042 set containing a 26 pin flange and short-circuit plug).

4.3 Wiring Checklist

Emergency stop circuit: normally closed dual channel, independently forming a safety circuit without going through PLC logic.

Enable switch: If using secondary buttons (S2, S3), the normally open contacts can be connected to the "enable input" of the safety module or directly connected in series in the servo enable circuit (depending on the safety level design).

Handwheel wiring: RS422 differential signals (A,/A, B,/B) should be twisted pair shielded, with the shielding layer grounded at one end. Power supply 5V ± 5% or 10-30V.

Axis selection/magnification switch: Connect to the PLC digital input module, and it is recommended to use 0V for the common terminal.

Membrane button or illuminated button: LED requires an external current limiting resistor (approximately 1k Ω at 24V), pay attention to polarity.

4.4 Debugging steps

After connecting the handheld box, check the status of the emergency stop input signal on the system diagnostic interface (normally it should be 1, pressing the emergency stop button should be 0).

Enable switch: Press to the second position and check if the corresponding PLC input point has changed to 1.

Rotate the handwheel and observe whether the position counter increases or decreases smoothly, and whether there are any missing steps (the position should change linearly when rapidly rotating continuously).

Test the gear positions of the axis selection switch and the magnification switch to confirm that the coding is correct.

Chapter 5 Maintenance Suggestions and Life Extension Measures

Periodic maintenance project method

Check the cable entrance daily for wear and tear, and visually inspect for broken spiral wires. If the outer skin cracks, repair it promptly with a heat shrink tubing

Test the emergency stop and enable switch functions weekly and observe the machine's response

Use electronic contact cleaner spray to clean connector pins every month

Measure the output signal quality of the handwheel quarterly (using an oscilloscope), record the pulse amplitude and phase, and compare with the initial results

Check the internal welding points and wiring every year, open the shell, and re weld the virtual welding points

Replace frequently operated membrane buttons as needed (HBA provides aluminum panel for front panel without/with handwheel) Order 084395/084396 (without handwheel), 083635/083636 (with handwheel)

Special reminder: The design of the EUCHNER handheld operating unit allows for resistance to oil stains and coolant at IP65 rating, but should not be immersed. Cables should be inspected regularly, and it is recommended to replace the spiral wire every 3-5 years (especially for production lines that operate 24 hours a day).

Chapter 6 Rapid Replacement Process for Discontinued Models

When the handheld box cannot be repaired as a whole or the prototype number is no longer in production (such as when the old HBE series has been replaced by HBA/HBL), the following process can be taken:

Record the original interface pin definitions: including pin assignments for all buttons, handwheels, and emergency stops.

Choose existing models with the same function: for example, the original handheld box has "axis selection switch (6 positions) x 1+magnification switch (5 positions) x 1+emergency stop+handwheel", and HBA-100186 (selection switch 5 positions+6 positions+handwheel+2 secondary buttons+emergency stop) can be selected. If there is no identical configuration, the HBA/HBM/HBL kit can be used for self-assembly (order numbers for HBA housing kit on page 29, HBM kit on page 37, HBL kit on page 41), and individual switches, handwheels, cables, and flange sockets can be selected for self welding and assembly.

Copy wiring: Cut off the original cable plug and re crimp or solder according to the pin definition of the novice holder box (note that the polarity of the emergency stop and enable contacts must match the original safety circuit).