The Allen-Bradley 1771-OGD is a 16-point TTL (Transistor-Transistor Logic) digital output module designed for integration with PLC-5 series controllers. It facilitates precise control of low-voltage digital signals in industrial automation systems.
Key Features
- 16 TTL Outputs: Provides sixteen channels for efficient digital signal management.
- Configurable Logic Levels: Supports both “High = True” and “Low = True” configurations to accommodate various application requirements.
- Rapid Response Time: Ensures swift signal processing with an output signal delay of less than 1 millisecond.
- Robust Isolation: Offers 1500 V AC isolation to protect internal circuits from external electrical disturbances.
- Overcurrent Protection: Equipped with 0.5 A, 250 V normal-blow fuses to safeguard against overcurrent conditions.
Technical Specifications
- Output Voltage Range: 2.0 to 5.25 V DC (ON state); -0.2 to +0.8 V DC (OFF state).
- Output Current: Maximum 0.20 A per output (sink); 0.001 A per output (source).
- Backplane Current: 230 mA maximum.
- Power Dissipation: 2.8 W maximum.
- Thermal Dissipation: 9.5 BTU/hr maximum.
- Operating Temperature: 0°C to 60°C (32°F to 140°F).
- Humidity: 5% to 95% non-condensing.
- Certifications: CSA, CE, UL.
Installation and Compatibility
The 1771-OGD module is designed for seamless integration into 1771 I/O chassis, including models 1771-A1B, -A2B, -A3B, -A3B1, and -A4B. It requires an external 5 V DC power supply with a tolerance of ±0.25 V and a maximum ripple of 50 mV peak-to-peak. The module is compatible with the 1771-WH wiring arm, facilitating straightforward field wiring connections.
Applications
Ideal for industrial automation tasks that demand precise TTL signal control, the 1771-OGD is suitable for applications such as:
- Driving indicator lamps.
- Controlling solenoids.
- Operating contactors.
- Interfacing with other TTL-compatible devices.
Its rapid response time and robust isolation make it a reliable choice for environments where accurate and swift digital output control is essential.
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