1791-0A32 Allen-Bradley 32-Point AC Output Block I/O

Allen‑Bradley 1791-0A32 High‑Density AC Output Block I/O

Key Technical Specifications

• Output channels: 32 (four groups of eight), 20‑132 VAC, 47‑63 Hz.
• Minimum on‑state current: 50 mA per output; maximum continuous 300 mA at 60 °C (vertical).
• Surge current: 10 A for 50 ms, repeatable every two seconds (1200 W inrush).
• Output delay: OFF→ON 1.0 ms; ON→OFF 8.3 ms (60 Hz) / 10 ms (50 Hz).
• Isolation & protection: Internal power supply with protection circuitry; group‑to‑group isolation ensures reliable operation.
• External power required: 85‑132 VAC, 47‑63 Hz; supplies both logic and outputs.
• Off‑state leakage: 3 mA max; voltage drop 1.5 V peak at 300 mA.

Installation, Mounting, and Wiring

• Mount the 1791-0A32 vertically or horizontally. Vertical mounting allows 600 mA per output at 30 °C, derating to 300 mA at 60 °C.
• Horizontal orientation supports 300 mA at 30 °C and 150 mA at 60 °C.
• Power connects to terminals L1 (1), N (3), and GND (2); RIO wiring uses BLU (6), CLR (8), and SHD (7) on the left side.
• Open the front cover to set the I/O rack number via the group switch assembly. Status LEDs on the cover aid troubleshooting.
• Operate the module between 0 °C and 60 °C. Use appropriate conductors (e.g., 14 AWG) for field terminations.

Frequently Asked Questions

• What is the output voltage range of the 1791‑OA32?
  It accepts 20‑132 VAC, 47‑63 Hz; nominal 120 VAC. External control power must be 85‑132 VAC.
• How many output groups does it have, and are they isolated?
  The 1791‑OA32 has four groups of eight outputs each. Groups are isolated from one another for reliable operation.
• Which controllers work with this module?
  It is compatible with PLC‑2, PLC‑3, and PLC‑5 families via RIO scanners such as 1771‑SN, 1772‑SD, 1775‑S5, and PLC‑5 VME (6008‑LTV).
• How does mounting orientation affect output current?
  Vertical mounting provides higher capacity (600 mA at 30 °C). Horizontal reduces it (300 mA at 30 °C) – always respect derating at elevated temperatures.
• What do the status LEDs indicate?
  Front‑panel LEDs show power, communication, and output status, simplifying troubleshooting.
• Do you offer same‑day shipping?
  We dispatch within five days via FedEx, UPS, or DHL. Stock is available.

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