Complete 24V DC I/O Station: Allen-Bradley 1791-16BC

Complete Technical Specifications

• Brand & Model: 1791-16BC by Allen-Bradley.
• Product Family: Part of the versatile 1791 Block I/O series.
• Input Channels: Sixteen (16) DC inputs.
• Output Channels: Sixteen (16) DC outputs.
• I/O Voltage Range: 10 to 30 Volts DC for both inputs and outputs.
• External Power Supply: 19.2 to 30 VDC required.
• Supply Current: 300 mA typical from the external source.
• Output Current (60°C): 500mA (Vertical Mount) / 250mA (Horizontal Mount).
• Surge Current Rating: Handles 3 Amps for up to 50 milliseconds.
• Power Dissipation: Maximum 17.8 Watts.
• Communication: Remote I/O adapter mode, daisy-chain topology.
• Baud Rates Supported: 57.6K, 115.2K, up to 230.4K baud.
• Module Dimensions: 6.95" H x 4.35" W x 3.85" D.

Expert FAQs

• Q: What is the maximum cable distance for Remote I/O?
  A: It depends on baud rate. Use up to 10,000 ft at 57.6K baud or 2,500 ft at 230.4K baud.
• Q: Are the outputs on this module fused?
  A: No, the outputs are not fused. You should add external fusing based on your load requirements.
• Q: Can I mix this DC module with AC Block I/O modules?
  A: Yes, you can daisy-chain different 1791 Block I/O modules (AC/DC) on the same RIO link.
• Q: What happens if my supply voltage is only 24V DC?
  A: The module operates perfectly. The 10-30V range means it will work even if voltage sags slightly.
• Q: How do I know if my PLC is compatible?
  A: The 1791-16BC works with any Allen-Bradley controller that supports Remote I/O (like PLC-5 or SLC with a scanner).

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