Overview
The Allen-Bradley 1762-IQ8 is a compact 8-point 24VDC discrete input module designed for the MicroLogix 1200, 1100, and 1400 programmable logic controller (PLC) systems. This sink/source input module processes digital signals from field devices such as pushbuttons, limit switches, proximity sensors, and photoelectric sensors. It delivers the reliability and industrial robustness required for small- to mid-sized control systems in OEM machines, packaging equipment, HVAC control panels, and process control applications.
Key Features
- 8-channel discrete input capability with single-group configuration
- Dual sink/source wiring support for flexible field device integration
- Input voltage range 10–30V DC at 30°C (86°F); 10–26.4V DC at 55°C (131°F); nominal 24V DC
- 8 millisecond signal delay on all channel transitions (OFF→ON, ON→OFF)
- Optical isolation rated to 1500V AC, protecting internal electronics from voltage spikes
- Industrial-grade immunity to ESD, RF, EFT, surge, and conducted noise
- Single-slot, compact form factor for space-constrained panels
- DIN rail or direct panel mounting; up to six modules distance from power supply
- Hazardous location rated (Class I, Division 2, Groups A–D)
- Operating temperature –20°C to +65°C; up to 95% RH non-condensing
- 30G shock and 5G vibration rated for rugged environments
- UL, CE, and c-UL certified for global compliance
Technical Specifications
- Input Channels: 8 points, single group with internally connected commons
- Input Voltage (Nominal): 24V DC
- Input Voltage (Range): 10–30V DC @ 30°C (86°F); 10–26.4V DC @ 55°C (131°F)
- Input Current: Approximately 7 mA per channel (typical)
- Signal Delay: 8 ms (both OFF→ON and ON→OFF transitions)
- Backplane Current Draw: 50 mA @ 5V DC
- Power Consumption: 0.25 Watts
- Heat Dissipation: 3.7 Watts total
- Group-to-Backplane Isolation: 1200V AC (1 sec) or 1697V DC (1 sec); 75V DC working voltage (IEC Class 2 reinforced insulation)
- I/O Isolation Type: Optical isolation, 1500V AC rated
- Connection Type: Screw terminal contacts with finger-safe cover
- Mounting: DIN rail or panel mount
- Enclosure Rating: IP20
- Operating Temperature: 0°C to 55°C (standard); –20°C to +65°C (extended range)
- Storage Temperature: –20°C to +65°C
- Relative Humidity: 5–95% non-condensing
- Certifications: UL, CE, c-UL (C-Tick), Class I Division 2
- Part Number: 1762-IQ8 /A
- Manufacturer: Rockwell Automation (Allen-Bradley)
- UPC: 612598207206
- Module Width: 40 mm (single-slot)
- Power Supply Distance Rating: Up to 6 modules from power supply
Typical Applications
The 1762-IQ8 is well-suited for:
- Small to mid-sized manufacturing machines requiring discrete input monitoring
- Packaging and material handling equipment
- HVAC control systems and building automation
- Process control and monitoring in food, beverage, and light chemical processing
- Machine tool control and OEM system integration
- Safety-critical input logic for interlocks and emergency stops
- Hazardous location (Class I, Division 2) control environments
- Any MicroLogix 1200, 1100, or 1400 system requiring digital signal input expansion
Compatibility & Replacements
Compatible With
- MicroLogix 1200 programmable logic controller
- MicroLogix 1100 programmable logic controller
- MicroLogix 1400 programmable logic controller
- 1762 series I/O modules and expansion chassis
- Allen-Bradley automation control systems
Replaces / Drop-In Replacement For
The 1762-IQ8 serves as a primary 8-point sink/source input module. Modern drop-in replacements include the 2085-IQ16 (16-point input module) for systems requiring expanded I/O capacity. Verify compatibility with your system integrator before ordering.
Works With
- RSLogix 500 programming software (full compatibility)
- Studio 5000 (Logix Designer) for legacy program migration
- MicroLogix 1762 series backplane interface
- Rockwell Automation FactoryTalk View HMI platform
- Standard 24V DC industrial field devices (pushbuttons, proximity sensors, limit switches, photoelectric sensors)
- Discrete input signal monitoring in PLC ladder logic
