Allen-Bradley ControlLogix | 1756-OF8IH Output Module

Allen-Bradley 1756-OF8IH – Advanced Isolated HART Output Module for ControlLogix

Why Choose the 1756-OF8IH?

• ✔ 8 fully isolated output channels
• ✔ Built-in HART 5/6/7 communication
• ✔ 15-bit precision for accurate control
• ✔ Short-circuit and overvoltage protection
• ✔ Works with 0-20mA & 4-20mA signals

Key Specifications

• Model: 1756-OF8IH (ControlLogix Series)
• Output Type: Isolated current (0-20mA/4-20mA)
• Resolution: 15-bit (across 24mA range)
• Response Time: <23ms (HART off), <100ms (HART on)
• Isolation: 250V outputs-to-backplane
• Power Use: 400mA @ 24V DC
• Temp Range: 0°C to 60°C
• Humidity: 5-95% non-condensing

Protection Features

• Auto-shutdown at >21mA
• Withstands ±24V overvoltage
• Tested at 3535V DC isolation

Warranty & Support

• 🔧 12-month product warranty
• 🚚 Fast shipping: FedEx/UPS/DHL
• 📞 Technical support available

Expert FAQs

• Q: How many HART modems does the 1756-OF8IH have?
  A: Each of the 8 channels has its own HART modem.
• Q: What’s the maximum load reactance supported?
  A: 10μH with short-circuit survival capability.
• Q: Is calibration required for this module?
  A: Yes, recommended every 12 months for best accuracy.
• Q: What isolation tests has this module passed?
  A: 3535V DC for 60s (outputs-to-backplane).
• Q: Can it operate in humid environments?
  A: Yes, works at 5-95% non-condensing humidity.

Get Started

• 📥 Download 1756-OF8IH manual for full details