1. Overview & Compatibility

• ESR03B = Enhanced / revised version of ESR01B, with improved circuitry and noise immunity

• Backward compatible with ESR01B (direct replacement, no wiring changes)

• Commonly paired with:

  • JANCD-CP01 / CP01B (CPU board)

  • JANCD-PWR (power supply board)

2. Key Functions

1. Machine I/O Signal Handling

   • Connects to operation panels, limit switches, proximity sensors, solenoids, tool changers, coolant/lubrication systems

   • 64-point digital I/O (32IN / 32OUT) with full optical isolation
2. Spindle & Servo Signal Interface

   • Processes spindle encoder signals, servo enable, alarms, orientation/gear signals

   • Supports spindle VFD / servo drive coordination
3. Isolation & Noise Suppression

   • Optical isolation + surge suppression for 24VDC systems

   • Designed for harsh shop-floor environments
4. Auxiliary Function Control

   • Manages M-code (coolant, clamp, tool rotation), S-code (spindle speed), T-code (tool number) signal exchange

3. Specifications

• Model: JANCD-ESR03B (Rev.A)

• I/O Points: 32 x Input / 32 x Output (64 total), optically isolated

• Input Voltage: 24VDC ±10%, NPN/PNP compatible

• Output Type: Transistor output, 0.5A max per point (drives small relays)

• Connectors: 2 x 50-pin flat cable headers (to machine terminal block)

• Operating Temperature: 0°C ~ +55°C

• Weight: Approx. 1.4 kg

• Mounting: Standard CNC rack slot

4. Typical Applications

• Yaskawa YASNAC 2000B / B Series CNC lathes, machining centers

• Replacement for failed machine-side I/O boards (panel & auxiliary function control loss)

• System retrofit & maintenance of legacy Yaskawa CNC installations

5. Common Faults & Replacement

• Symptoms: Unresponsive I/O points, lost spindle signals, dead panel keys, “EXTERNAL I/O ERROR” alarms

• Replacement: ESR03B directly replaces ESR01 / ESR01B (plug-and-play, parameter-compatible)