Allen-Bradley 1756-OF8IH | 8-Channel Isolated HART Module

Allen-Bradley 1756-OF8IH ControlLogix Isolated HART Analog Output Module

8-Channel High-Resolution Analog Output with Integrated HART

Key Features

• 8 fully isolated differential outputs
• Integrated HART modem per channel (HART 5/6/7)
• 15-bit resolution (0-20mA / 4-20mA)
• ±24V DC overvoltage protection
• Channel-to-channel isolation
• Weight: 0.32 kg (0.71 lbs)

Technical Specifications

• Output Range: 0-20mA or 4-20mA
• Resolution: 15-bit
• Isolation: 250V outputs-to-backplane (3535V tested)
• Accuracy: ±0.15% @ 4-20mA
• Response Time: <100ms (HART mode), <23ms (non-HART mode)
• Power: 400mA @ 24V DC
• Backplane Current @ 5.1V: 350 mA
• Power Dissipation: 5.5 W max

Protection Features

• Output short-circuit protection (≤21mA)
• ±24V overvoltage protection
• 10μH load reactance capability
• 50-750Ω drive capability

Environmental Specifications

• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Relative Humidity: 5-95% non-condensing
• Vibration: 2g @ 10-500 Hz
• Shock (Operating): 30g

FAQ

Q: How many analog output channels?

A: Eight (8) fully isolated differential output channels.

Q: What HART versions does it support?

A: HART 5, HART 6, and HART 7.

Q: What is the output resolution?

A: 15-bit resolution for precise analog control.

Q: What is the response time with HART enabled?

A: Less than 100ms with HART mode enabled.