1791-0B32 Allen-Bradley Block I/O 24V High-Density Module

Allen‑Bradley 1791-0B32 High‑Density 24V DC Block I/O Module

Key Technical Specifications

• Output channels: 32, 10‑30 VDC nominal 24 VDC; minimum on‑state current 1 mA per output.
• Output current rating: 500 mA per output at 60 °C (vertical mounting); 250 mA at 60 °C (horizontal).
• Built‑in protection: Internal fusing safeguards the module without requiring external fuses.
• Voltage drop: Maximum 1 V at rated current; off‑state leakage ≤ 0.5 mA.
• Signal delay: 0.5 ms ON, 1.0 ms OFF (maximum).
• External power required: 19.2‑30 VDC, 300 mA continuous.
• Power dissipation: 19.2 W maximum (65.5 BTU/hr).

Frequently Asked Questions

• What is the output voltage range of the 1791-0B32?
  It accepts 10‑30 VDC, with a nominal 24 VDC. External control power must be 19.2‑30 VDC.
• Does this module require external fusing?
  No – the 1791-0B32 features built‑in internal fusing, eliminating the need for external fuses.
• Which controllers work with this module?
  It works with PLC‑2, PLC‑3, PLC‑5/250, PLC‑5 series, and SLC 5/02 controllers via Universal Remote I/O.
• How does mounting orientation affect output current?
  Vertical mounting provides 500 mA per output at 60 °C; horizontal reduces it to 250 mA at 60 °C. Ensure horizontal installations have enough airflow.
• What do the status LEDs indicate?
  COMM and STATUS LEDs show communication and module health; 16 individual LEDs display the state of each output group.
• Can I replace the module without rewiring?
  Yes – removable terminal strips let you disconnect wiring quickly, saving maintenance time during block replacement.
• Do you offer same‑day shipping?
  We dispatch within five days via FedEx, UPS, or DHL. Stock is available.

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