The Allen-Bradley 1791-32AO Series B 32 point Input Modules  is a discrete I/O block with thirty-two 120VAC input channels, organized in four groups. It requires a nominal input current of 11.0 mA per point and operates using the Remote I/O (RIO) communication protocol.

Features and benefits

High-Density Input: Integrates thirty-two 120VAC input channels in a compact, space-saving design.

Clear Grouping: Organizes inputs into four isolated groups of eight for simplified wiring and troubleshooting.

Robust Communication: Utilizes Remote I/O (RIO) protocol for reliable distributed control system architecture.

Operational Resilience: Features wide voltage tolerance (79-132VAC) and stable performance across industrial environments.

Enhanced Safety: Provides high-voltage isolation (up to 1250VAC) between I/O groups and logic circuits.

Flexible Installation: Supports DIN rail or panel mounting with removable terminal strips for convenient setup.

FAQ

Q1: How many input channels does this module have and at what voltage?

A1: It features thirty-two discrete input channels, each operating at a nominal voltage of 120V AC.

Q2: What communication protocol does it use?

A2: It supports the Remote I/O (RIO) protocol for integration into distributed control systems.

Q3: Can I replace it while the system is powered on?

A3: While not explicitly stated for hot-swapping, its high isolation rating (1250V AC) supports safe maintenance in live systems.

Q4: What is the module's operating voltage range?

A4: It accepts an external supply voltage from 85V to 132V AC, with inputs functional from 79V to 132V AC.

Q5: Is this product still in active production?

A5: No, the Allen-Bradley 1791-32A0 has a product lifecycle status of Discontinued/Obsolete.