Allen-Bradley 1771-VHSC - Precision High-Speed Counting for Industrial Automation

Key Performance Features

• Ultra-fast counting: 1MHz maximum frequency
• Flexible inputs: 5V or 12-24V selectable
• Rugged design: 1500V input/output isolation
• Multi-channel: 4 independent counters

Technical Specifications

• Brand: Allen-Bradley (Rockwell Automation)
• Model: 1771-VHSC
• Count range: 0-999,999 (programmable)
• Input current: 7mA @5V, 7-15mA @12-24V
• Output capacity: 2A per channel (8 total)
• Response time: <10μs (on), <100μs (off)
• Temperature range: 0°C to 60°C operation

Industrial Advantages

• Safety certified: UL Class I, Division 2
• Chassis compatible: Fits 1771 Series A/B I/O
• Reliable counting: Handles switch bounce up to 100Hz
• Fast processing: 1.5-2.9ms typical BTW time

Package & Support

• Shipping: FedEx, UPS, DHL available
• Warranty: 12-month manufacturer coverage
• Certifications: UL, CE compliant

Expert FAQs

• Q: Can it count in both directions?
  A: Yes, using A/B quadrature inputs
• Q: What's the maximum count value?
  A: Programmable up to 999,999
• Q: Suitable for harsh environments?
  A: Yes, -40°C to 85°C storage rating
• Q: How many outputs can trigger simultaneously?
  A: All 8 outputs can operate at once
• Q: Power requirements?
  A: 650mA backplane current