I. Product Introduction

1. Positioning

Basic type 40 input / 40 output digital I/O board, included in the LX3 system / commonly used expansion.

Used for CNC machines, special machinery, and small production lines, connecting sensors, buttons, solenoid valves, contactors, etc.

2. Core Specifications

Input: 40 points DC24V (NPN, low level valid)

Output: 40 points transistor DC24V, 0.3A / point

Interface: 2×50-pin flat cable sockets (CN1, CN2)

Power Supply: Backplane DC5V + external DC24V (≥2A)

Size: Approximately 310×215 mm (standard JANCD large board)

Temperature: 0℃～45℃, no condensation

Humidity: 10%～90% RH, no condensation

Version: Common Rev B1/B2

3. Main Functions

✅ 40 input + 40 output universal I/O, meeting the signal point requirements of small and medium-sized equipment

✅ LED status indication: Each I/O has an LED, facilitating on-site line inspection

✅ System bus communication: High-speed data interaction with LX3 main control board

✅ Short-circuit protection: Output end with self-recovery fuse, anti-surge

II. User Manual (Key Points)

1. Installation (LX3 Control Cabinet)

Slot: LX3 dedicated I/O slot (SLOT02/SLOT03, default front slot)

Fixation: 4 M3 screws, torque 0.8～1.0 N·m

Compatibility: Only Yasnac LX3/LX systems; cannot be used in XRC robot cabinets, DX series, or other brand CNC.

2. Wiring (CN1/CN2)

CN1 (50-pin): Input IN0～IN39

Common terminal: COM1 (24V+)

Signal: NPN sensor / switch negative pole → INx (low level valid)

CN2 (50-pin): Output OUT0～OUT39

Common terminal: COM2 (0V)

Load: Positive pole connected to 24V+, negative pole → OUTx

⚠️ Output limit: Single path ≤ 0.3A, entire board ≤ 2A;严禁 overload / short circuit.

3. I/O Address (LX3 System)

Input： IN0～IN39 → Address X000～X039

Output： OUT0～OUT39 → Address Y000～Y039

View： LX3 programmer → Diagnosis → I/O status

4. Fault Diagnosis

No indicator light for input： Check DC24V， COM1 wiring， sensor polarity

Output does not act： Check load wiring， COM2 connected to 0V， program ladder diagram

Communication error： Clean gold fingers， change slot， check backplane bus