The Allen-Bradley 1794-IA8 is a FLEX I/O discrete AC input module that integrates eight 120 VAC input points into Rockwell Automation control systems. Each channel includes electronic fuse protection rated at 0.5 A and individual LED status indicators for real-time operational feedback. Designed for industrial environments, the module delivers 5 mA typical input current at nominal voltage and provides 2500V AC isolation between module and backplane.
Technical Specifications
Input Characteristics
• Nominal input voltage: 120 VAC
• Input current: 5 mA typical at 120 VAC
• ON state voltage range: 79–132 VAC (50/60 Hz)
• OFF state voltage range: 0–20 VAC (50/60 Hz)
• Input impedance: 26 kΩ typical at 120 VAC
• Input delay ON to OFF: 8 ms typical
• Input delay OFF to ON: 30 ms typical
• Module-to-backplane isolation: 2500V AC, 1 sec.
• Backplane current draw: 100 mA typical at 5 VDC
Protection & Indicators
• Electronic fuse per input: 0.5 A typical
• Individual LED status indicator per input
Environmental
• Operating temperature: −20°C to 55°C (−4°F to 131°F)
• Storage temperature: −40°C to 85°C (−40°F to 185°F)
• Relative humidity: 5% to 95% non-condensing
• Vibration: 5 G @ 10–500 Hz
• Shock: 30 G @ 11 ms
• Enclosure: Open style, suitable for industrial cabinet mounting
– Key Features
• Eight discrete 120 VAC input channels
• Electronic fuse overcurrent protection on each channel
• Per-channel LED status indication
• 2500V AC galvanic isolation between module and system backplane
• Compliant with 50/60 Hz AC line frequencies
• Rugged industrial environmental specifications
– Compatibility & Integration
The 1794-IA8 integrates with Rockwell Automation ControlLogix, MicroLogix, and SLC 500 programmable logic controllers through the FLEX I/O backplane architecture. The module operates as a discrete I/O node within distributed automation systems.
