Product details
Allen-Bradley 1771-IA2 PLC-5 Digital Input Module
The 1771-IA2 from Allen-Bradley provides reliable 120V AC/DC digital input capability for industrial control systems. This versatile module interfaces directly with various sensors and switches in harsh environments. It offers excellent noise immunity and easy installation in PLC-5 systems.
Technical Specifications
- Brand: Allen-Bradley/Rockwell Automation
- Model: 1771-IA2
- Module Type: Digital Input Module
- Input Channels: 8 isolated points
- Voltage Rating: 120V AC/DC
- AC Operating Range: 87-138V AC
- DC Operating Range: 97-138V DC
- AC Signal Delay: 24ms (±10ms) on/off
- DC Signal Delay: 10ms (±4ms) on, 20ms (±9ms) off
- Off-State Current: 2.8mA maximum
- Backplane Current: 75mA
- Power Dissipation: 10.7W maximum
- Isolation Voltage: 1500V AC continuous
- Operating Temperature: 0-60°C (32-140°F)
- Status Indicators: 8 orange LED indicators
- Dimensions: 3.5 x 6.5 x 2.0 inches
Installation & Wiring
- Installs in 1771 I/O chassis with PLC processor
- Keying bands between pins 10-12 (upper) and 4-6 (lower)
- Input filtering reduces electrical noise interference
- Series A module design for reliable operation
- Thermal dissipation: 36.5 BTU/hour maximum
Packaging & Shipping
- 1× 1771-IA2 Digital Input Module
- 1× 1771-WA Wiring Arm
- Installation documentation
- Protective packaging materials
- Shipping via FedEx, UPS, or DHL
- 12-month warranty
Frequently Asked Questions
- What types of sensors work with this module?
The 1771-IA2 works with AC/DC proximity switches, pushbuttons, and limit switches. - How many input points does this module have?
It provides 8 isolated input channels for field devices. - Can I replace the module without rewiring?
Yes, the 1771-WA wiring arm allows replacement without disconnecting wires. - What is the operating voltage range?
87-138V AC or 97-138V DC input voltage range. - Does it provide electrical isolation?
Yes, it features optoelectrical isolation for protection against transients.
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