CNA-4mk3 Count Checker

Tohnichi CNA-4mk3 is a multi-channel digital count checker engineered for error-proofing and process verification in high-volume assembly environments such as automotive production, electronics manufacturing, and general industrial lines. Monitoring up to 4 independent tools simultaneously via completion signals, this compact device ensures accurate count tracking, sequence control, and threshold-based judgments to prevent under- or over-tightening errors, with a large LCD for real-time visibility and RS-232C output for seamless data integration. Featuring customizable alarms and robust DIN rail mounting, it supports lean manufacturing by reducing defects and enhancing traceability without interrupting workflows.

Key Performance Specifications

• Channels: 4 independent inputs for multi-tool monitoring
• Count Capacity: 0 - 999,999 per channel (resettable)
• Input Signal: NPN/PNP open collector (tool completion pulses; 5-24V DC)
• Accuracy: 100% count reliability (±1 pulse error margin)
• Judgment Functions: Pass/fail based on preset min/max counts and sequence

Physical and Environmental Specifications

• Dimensions: 120 mm W x 100 mm H x 50 mm D (4.72" x 3.94" x 1.97")
• Weight: 0.5 kg (1.1 lbs)
• Display: Large LCD (backlit, 16 characters x 2 lines) for multi-channel status
• Operating Temperature: 32°F to 104°F (0°C to 40°C); suitable for industrial settings
• Power Supply: AC 100-240V (50/60 Hz); optional DC 24V adapter
• Storage Conditions: Dry environment to prevent corrosion; calibration recommended annually

Key Features

• Multi-Channel Sequence Control: Monitors 4 tools independently with programmable sequences to enforce correct assembly order and prevent skips
• Real-Time LCD Monitoring: Displays current counts, status, and alarms across channels for immediate operator feedback in dynamic production lines
• Customizable Thresholds: User-set min/max counts per channel with audible/visual alarms for error detection and automatic reset options
• RS-232C Data Output: Interfaces with PC/software for logging up to 999,999 events with timestamps, enabling traceability and quality reporting
• DIN Rail Mounting: Compact design with easy clip-on installation for control panels, supporting integration with PLCs and other error-proofing systems
• Applications: Essential for torque tool count verification in automotive assembly, electronics PCB production, and general manufacturing; excels in defect prevention and process auditing