Yaskawa EN4-00387 Control Board Specification

Brand: Yaskawa (Yaskawa Electric)

Model: EN4-00387

Product Type: I/O Control Board / Machine Interface Board

Applicable System: Yasnac Series CNC Control System of Yaskawa (for older machines)

Origin: Japan 

I. Model Explanation

EN4: Coding for the I/O interface board series of Yaskawa CNC system

00387: Product serial number (standard model of I/O expansion board)

Hardware Alias: JANCD-xxxx series (equivalent spare part number with the same function)

II. Core Functions

EN4-00387 is a dedicated I/O expansion control board for Yasnac CNC system, mainly responsible for:

Machine tool I/O signal expansion: Increasing system input and output points

Logic signal processing: Connecting buttons, switches, sensors, solenoid valves

Safety circuit control: Emergency stop, door switch, overtravel interlock

Auxiliary mechanism control: Tool magazine, cooling, lubrication, fixture operation

Communication with the main CPU: Transmitting I/O status through a dedicated bus

III. Technical Parameters

1. Electrical Specifications

Operating Voltage: 24V DC ±10%

I/O Type: Isolated by optocoupler 24V DC

I/O Points:

Digital Input (DI): 32 points

Digital Output (DO): 16 points

Signal Logic: NPN leakage input / collector output

Response Time: ≤ 1ms

Isolation Voltage: 2500V AC

Power Consumption: Approximately 8W

2. Hardware Characteristics

Processor: Special logic control chip

Communication Interface: Yaskawa dedicated CNC bus (connected to the main CPU)

Status Indicators: POWER, RUN, ALM, I/O operation LED

Memory: SRAM (backup of I/O parameters, battery support)

Size: Standard long card (approximately 220mm × 150mm)

Installation: Standard slot of Yasnac control cabinet

3. Environmental Parameters

Operating Temperature: -10°C ~ +60°C

Storage Temperature: -20°C ~ +70°C

Humidity: 5% ~ 95% RH (no condensation)

Anti-vibration: 5–90Hz, 0.5G

Anti-shock: 15G (11ms)

IV. Applicable Systems

Standard Compatibility:

Yaskawa Yasnac 2000 series CNC

Older models of machine tools (such as Mori Seiki, OKUMA)

Complement: D-GSC01B, DF920/DF930 series main control boards

Not Applicable:

XRC / DX series robot controllers

New MP3000 /i80 system

V. Functional Characteristics

Independent I/O Expansion: Does not occupy resources of the main CPU

Full Opto-isolation: Strong anti-interference, suitable for industrial harsh environments

Short-circuit Protection: Automatic protection for overcurrent of output points

Fault Diagnosis: Alarm for I/O short circuit, communication abnormalities

Plug-and-play: Direct replacement of the same model board

Battery Backup: I/O parameters remain after power loss

VI. Spare Parts Compatibility

Direct Replacement:

Full version of EN4-00387 (A/B/C versions)

JANCD-xxxx I/O board with the same function

Standard I/O spare parts of the old Yasnac system

VII. Summary

EN4-00387 is the core I/O expansion board of the old Yasnac CNC system of Yaskawa, dedicated to machine tool I/O signal expansion, logic control and safety interlock. It is a key component for the maintenance and spare part replacement of old CNC machine tools.