Allen-Bradley 1762-IA8 8-Point 120V AC Input Module

Product Overview

The Allen-Bradley 1762-IA8 is an 8-point 120V AC digital input expansion module for the MicroLogix 1200 controller family. It provides isolated AC input channels with LED status indication, expanding the input capacity of MicroLogix 1200 systems for industrial automation applications requiring additional AC input points.

Key Specifications

• Product Family: MicroLogix 1200 Expansion I/O
• Number of Inputs: 8 digital AC inputs
• Voltage Category: 100/120V AC
• Operating Voltage: 79–132V AC @ 47–63 Hz
• ON-State Voltage (min): 79V AC
• ON-State Voltage (max): 132V AC
• OFF-State Voltage (max): 20V AC
• ON-State Current (nom): 12.0 mA @ 120V AC, 60 Hz
• ON-State Current (max): 16.0 mA @ 132V AC, 63 Hz
• ON-State Current (min): 5.0 mA @ 79V AC, 47 Hz
• OFF-State Current (max): 2.5 mA
• Inrush Current (max): 250 mA
• Nominal Impedance: 12 kΩ @ 50 Hz
• Signal Delay (On): 20.0 ms
• I/O Isolation: Isolated
• Input Group: Group 1: inputs 0–7 (internally connected commons)
• Isolation Voltage: 1517V AC @ 1s or 2145V DC @ 1s (132V AC working)
• Bus Current Draw: 50 mA @ 5V DC (0.25 W)
• Heat Dissipation (max): 2 W
• Power Supply Distance Rating: 6 (max 6 modules from power supply)
• Operating Temperature: −20 to 65 °C (−4 to 149 °F)
• Storage Temperature: −40 to 85 °C (−40 to 185 °F)
• Operating Humidity: 5–95% non-condensing
• Dimensions: 90 mm (H) × 40.4 mm (W) × 87 mm (D)
• Weight: 209 g
• Mounting: DIN rail or panel mount
• Wire Size: #14 to #22 AWG (solid); #16 to #22 AWG (stranded)
• IEC Input Compatibility: Type 1+
• Certifications: UL Listed, Class I Div 2 (Groups A, B, C, D), CE

Features & Benefits

• Isolated Input Channels: 132V AC working isolation protects controller from field-side transients
• Wide Operating Temperature: −20 to 65 °C extends application range to harsh environments
• LED Status Indication: Individual input LEDs provide immediate visual diagnostics
• Compact Footprint: 40.4 mm width maximizes panel space efficiency
• Hazardous Location Rated: Class I Division 2 certification for use in classified areas
• Low Power Consumption: Only 50 mA @ 5V DC and 2W heat dissipation
• Flexible Mounting: DIN rail or panel mount options for installation versatility

Applications

• AC limit switch and proximity sensor expansion
• Pushbutton and selector switch panels
• Motor starter auxiliary contact monitoring
• Machine control input expansion
• Hazardous location signal acquisition

Installation Guide

1. Controller Compatibility: Verify the 1762-IA8 is installed within 6 modules of the MicroLogix 1200 power supply (distance rating = 6).
2. Mounting: Mount on 35 × 7.5 mm or 35 × 15 mm DIN rail (EN 50 022). For high-vibration environments, use DIN rail end anchors (1492-EA35 or 1492-EAH35) or panel mount with M4/#8 screws.
3. Module Connection: Connect the expansion module to the controller or adjacent module using the provided ribbon cable.
4. Field Wiring: Use #14–22 AWG solid or #16–22 AWG stranded wire. Torque terminals to specification per the installation manual.
5. Clearance: Maintain 50.88 mm (2 inches) clearance on all sides for adequate airflow and ventilation.
6. Environmental: Install in enclosures rated for the application environment. Maintain −20 to 65 °C operating temperature.
7. Power-up: Apply power and verify input LEDs respond correctly to field device activation.

FAQ

Q: Which MicroLogix controllers are compatible with the 1762-IA8?
A: The 1762-IA8 is compatible with MicroLogix 1100, 1200, and 1400 controllers.

Q: Can I use 240V AC with the 1762-IA8?
A: No. The maximum operating voltage is 132V AC. For 240V AC applications, use a different input module rated for higher voltage.

Q: What does the distance rating of 6 mean?
A: The module must be installed no more than 6 modules away from the system power supply to ensure adequate power distribution.

Q: Is the 1762-IA8 suitable for outdoor installation?
A: The module itself requires enclosure protection. It is rated for −20 to 65 °C operating temperature but must be installed in a suitable NEMA/IP-rated enclosure for outdoor use.

Selection Tips

• Verify all field devices operate at 120V AC within the 79–132V range
• Count total expansion modules and ensure distance rating of 6 is not exceeded
• For panel mount in high-vibration environments, use screws and washers per specification
• Consider total heat dissipation (2W per module) when planning panel ventilation
• Order compatible DIN rail (35 × 7.5 mm or 35 × 15 mm) if not already installed