1. General Description

2. Basic Specifications

• Compatible System: YASNAC I80 / I80M (all variants)

• Backplane: JANCD-FC001 (1 full slot)

• Dimensions: 216 × 140 mm

• Panel Interface: 50-pin ribbon cable connector (to operator panel)

• Bus Interface: Internal I80 system bus (to FC500 PLC core)

• Operating Current: ~0.3 A (24 V DC)

• Operating Temperature: 0 °C to +60 °C

• Storage Temperature: −20 °C to +70 °C

• Humidity: ≤80% RH (non-condensing)

3. Key Features

Panel Signal Processing

• Connects to operator panel keys, mode switches, cycle start/stop buttons

• Drives panel LEDs (power, alarm, cycle status, axis indicators)

• Converts panel switch inputs to CNC-compatible logic signals

Integrated Circuit Design

• On-board signal conditioning and ESD protection for panel I/O

• Direct connection to FC500 PLC core via internal bus

• No external wiring needed for panel-CNC communication

Compatibility & Reliability

• Matches YASNAC I80 standard operator panels

• Supports Hitachi Seiki machine retrofits (OEM compatibility)

• Compact design with surface-mount components for stability

4. Compatibility & Configuration

Required Boards

• CPU: JANCD-FC250 / FC251

• PLC Core: JANCD-FC500 (mandatory)

• Backplane: JANCD-FC001

Typical System Setup

• Standard I80: FC251 + FC500 + FC903 + FC860 (display board)

• Hitachi Seiki retrofit: FC250 + FC500 + FC903-1B

Limitations

• Max 1 board per system

• Dedicated to operator panel I/O (cannot be used for general I/O)

5. Common Faults

• Panel keys unresponsive: Ribbon cable loose or connector damage

• LED indicators not lighting: On-board driver chip failure

• Intermittent panel communication: Backplane contact issue

• No panel power: 24 V DC input fuse blow

6. Applications

• YASNAC I80 CNC machine tools (lathes, mills, machining centers)

• Hitachi Seiki machine retrofits (OEM replacement)

• Systems requiring dedicated operator panel-CNC interface

• Replacement for aging FC903 boards in legacy I80 installations