Allen-Bradley 1791-8AC Distributed I/O device

The 1791-8AC is a Distributed I/O device that is primarily used for implementing Distributed I/O solution. This device supports Allen-Bradley’s RIO protocol, a 3-Wire Protocol utilizing Belden 9463 (or approved equal) cable, connecting RIO such as I/O block modules in daisy chain topology. This module belongs to the legacy I/O block family that is compatibly used with PLC2, PLC3, PLC5 legacy controller platforms as well as RIO enabled SLC500 processors with 1747-SN Remote I/O scanner module.

The 1791-8AC functions as RIO adapter only. It is used to interface up to Eight (8) 120VAC input and Eight (8) 120VAC outputs. It sends input updates to the processor connected in the RIO network and receives control command to actuate the module’s output channels via the same RIO network. The module’s embedded RIO interface allows for seamless integration to the said network.

Technical specifications for 1791-8AC

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Output Voltage Range20-123VAC

BrandAllen-Bradley

Product Type:Block I/O

No. of Inputs:Eight (8)

No. of Groups:1 group of 8

On-state Voltage range:79-132VAC

No of outputs:Eight (8

External Power, Voltage:85-132VAC

External Power, Current:150 mA

Mounting:Vertical / Horizontal

Power Dissipation, maximum:12.9 Watts

Thermal Dissipation, maximum:43.99 BTU/Hr

Part Number/Catalog No.1791-8AC

Voltage120 Volts AC

Inputs per Block8

Input On-state Voltage Range79 to 132 Volts AC

Input On-state Current5mA at 79 Volts min.

Input Off-state Voltage35 Volts max.

Input Off-state Current2.3 mA min.

Outputs per Block8

External Power85 to 132 Volts AC

Dimensions6.95 x 2.7 x 3.85 in.

UPC10612598127068

Product Lifecycle Status*Discontinued/Obsolete