1756-OB32 Allen Bradley ControlLogix Digital Output Module
The Allen-Bradley 1756-OB32 is a high-reliability digital output module in the ControlLogix series, designed for industrial automation systems requiring precise control of external devices. It provides 32 isolated digital output points with a 10-31V DC operating range, enabling seamless integration with ControlLogix controllers and compatibility across diverse industrial applications.
Key Features
High-Capacity Output
32 Digital Outputs: Each channel supports independent configuration and force functions, allowing flexible control of devices like indicators, relays, contactors, solenoid valves, buzzers, and alarms.
Robust Drive Capability: Directly drives loads such as 24V DC relays, contactors, and solenoid valves, with each channel handling up to 0.5A (module total ≤4A).
Visual Monitoring & Diagnostics
32 LED Indicators: Green LEDs per channel provide real-time status feedback (on/off), enabling quick fault identification and operational verification.
Modular Design & Installation
Single-Slot Footprint: Occupies one slot in a ControlLogix chassis, optimizing space in compact systems.
Removable Terminal Block (RTB): Uses 1756-TBCH (cage clamp) or 1756-TBS6H (spring clamp) for tool-free wiring, reducing maintenance time.
System Integration
Producer/Consumer Technology: Leverages ControlLogix architecture for efficient data sharing with other controllers, enhancing system-wide coordination.
Universal Compatibility: Works with all ControlLogix processors (e.g., 1756-L71, 1756-L72) and supports hot-swap under power (RIUP) for minimal downtime.
Applications
The 1756-OB32 is ideal for:
Industrial Automation: Controlling conveyor systems, packaging machinery, and assembly lines.
Process Industries: Managing valves, pumps, and actuators in oil/gas, water treatment, and power generation.
Machine Control: Driving relays, indicators, and solenoids in CNC machines and robotic systems.
Configuration & Maintenance
Wiring: Connect field devices to RTB terminals (COM terminals grouped in 16-point pairs for shared power).
Software Setup: Define the module in RSLogix 5000/Studio 5000, assign I/O addresses, and configure channel parameters (e.g., output force, fault handling).
Maintenance: Replace modules under power using RIUP (Removal/Insertion Under Power) to avoid system shutdowns.