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iLD Driver

ARM (Automatic Recovery Mode)

Overview

Section titled “Overview”

In ARM mode, the driver starts automatically after a power-up delay if the start conditions are fulfilled.

Start Conditions

Section titled “Start Conditions”

The driver will start when ALL of the following conditions are met:

  1. ✅ Modulation voltage higher than threshold voltage (>0.2-0.3V)
  2. ✅ Interlock loop closed
  3. ✅ Temperature below adjusted threshold (if NTC connected)

Behavior During Operation

Section titled “Behavior During Operation”

Interlock Failure

Section titled “Interlock Failure”

When interlock loop opens:

  • ❌ Driver disables the laser immediately
  • 🔴 Interlock LED starts flashing
  • Driver remains disabled until interlock loop closes

Recovery:

  • When interlock loop closes → 5 second delay → laser enabled

Temperature Failure

Section titled “Temperature Failure”

When temperature exceeds threshold:

  • ❌ Driver disables the laser immediately
  • 🔴 TEMP LED starts flashing
  • Driver remains disabled until temperature drops below hysteresis threshold

Recovery:

  • When temperature drops below hysteresis → 5 second delay → laser enabled

Modulation Behavior

Section titled “Modulation Behavior”

When modulation voltage is below threshold (0.2-0.3V):

  • ✅ Laser LED is ON (driver enabled)
  • 📴 Laser does NOT emit
  • Laser will emit when modulation voltage rises above threshold

Activating ARM Mode

Section titled “Activating ARM Mode”

Activation Instructions

Section titled “Activation Instructions”
  1. Disconnect or switch off the power supply
  2. Set Mode jumper (install the jumper on the MODE connector)
  3. As long as the jumper is set, the driver will start in this mode
  4. Connect or switch on the power supply

The laser will emit if all start conditions are met after the 5-second power-up delay.

ARM Mode Flow

Section titled “ARM Mode Flow”
Power On
   ↓
5s Power-up Delay
   ↓
Check Start Conditions
   ↓
┌─────────────────┐
│ All Conditions  │
│ Met?           │
└────┬─────┬──────┘
     │     │
    YES   NO
     │     │
     ↓     ↓
  Enable  Wait & Monitor
  Laser   (check conditions continuously)
     │     │
     └──┬──┘
        ↓
    Monitor During Operation
        ↓
  ┌─────────────┐
  │ Failure?    │
  └─┬────────┬──┘
    │        │
   YES      NO
    │        │
    ↓        ↓
 Disable  Continue
 & Flash  Operation
  LED       │
    │        │
 Recovery    │
  after      │
 5s delay    │
    │        │
    └────┬───┘
         ↓
    Continue Monitoring

Advantages of ARM Mode

Section titled “Advantages of ARM Mode”
  • ✅ Automatic operation - No manual intervention required
  • ✅ Automatic recovery - Resumes after fault conditions clear
  • ✅ Simplified setup - Ideal for automated systems
  • ✅ Continuous monitoring - Always checking safety conditions

Use Cases

Section titled “Use Cases”

ARM mode is ideal for:

  • Automated production systems
  • Remote installations
  • Applications requiring automatic recovery after power loss
  • Systems with external safety interlocks
  • Temperature-controlled laser systems