Yaskawa HMK-3993 CNC Keyboard Circuit Board

Technical Specifications

Model:HMK-3993

Brand:Yaskawa

Product type:Yasnac CNC MDI operator keyboard PCB board

Power supply:DC5V

Control function:Key press signal scanning,MDI manual input signal encoding,key data transmission to CNC main controller

Communication:Parallel interface to CNC main board

Mounting:Operator panel mount

Operating temperature:0~55℃

Relative humidity:5~95% non-condensing

Weight:0.22kg

Certification:CE

System compatibility

HMK-3993 belongs to Yaskawa Yasnac MX3 CNC controller family,matched with Yasnac MX3 old CNC systems. Widely used in old machining centers and CNC lathes. This is a discontinued legacy keyboard PCB for machine tool operation panel maintenance spare replacement.

Function

HMK-3993 serves as high precision CNC MDI keyboard circuit board. It scans key signals of the operator panel,encodes key press information and transmits input data to CNC main board. It supports manual program input,axis jogging,parameter setting and machine operation commands. Built-in signal debounce circuit to avoid false triggering caused by mechanical key bounce. It realizes human-machine operation interaction for Yasnac CNC machine tools.

Installation

Mount HMK-3993 on the CNC operator panel frame. Connect flat cable between keyboard board and CNC main board according to wiring drawing. Check flat cable integrity before power-up,verify all key input response after power on.

Interface

‑Flat cable connector for CNC main unit

‑Matrix key circuit

‑LED indicator pins

‑Onboard key scanning and debounce circuit

Circuit feature

Compact rugged PCB layout,equipped with surge and ESD suppression circuit. Stable key signal transmission,strong anti-interference performance for workshop environment.

Feature

HMK-3993 is obsolete Yaskawa Yasnac series spare part. Typical failures include key matrix circuit damage,key signal missing,flat cable connector oxidation. Check board integrity and connector pins before replacement. This board must match corresponding Yasnac MX3 CNC controller,direct substitution without key function test is not recommended.

Diagnostic

When some keys no response,key signal loss or input disorder occurs,the board triggers corresponding alarm codes and sends fault signal to CNC main controller.

Built‑in function

Matrix key scanning,key signal debounce,MDI input data encoding,keyboard fault monitoring,used as Yasnac CNC operator MDI keyboard board spare replacement.

Product Brief

HMK-3993 is Yaskawa Yasnac MX3 CNC series MDI keyboard PCB board for CNC machine tools and precision automation equipment. Confirm CNC controller model matching before ordering. ESD protection required during handling and installation.