Allen-Bradley 1794-ASB

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1794-ASB

Type

Remote I/O adapter

Application

Distributed I/O

Used with

1794 FLEX I/O system

I/O module capacity

8

Power consumption at 24V

7.9 W

Inrush current at 24V

23 A for 2 ms

Power dissipation, max

4.6 W @ 19.2V DC

Thermal dissipation

15.7 BTU/hr @ 19.2V DC

Power supply 24V current load

330 mA

Power supply input voltage, nom

24V DC

Operating voltage range

19.2…31.2V DC (includes 5% AC ripple)

DeviceNet cable

Remote I/O: Belden 9463 or equivalent, Allen-Bradley pin connector part no. 942029-03

Isolation voltage

Tested @ 850V DC for 1 s, user power to system

Dimensions (HxWxD), approx

87 x 68 x 69 mm 3.4 x 2.7 x 2.7 in.

Temperature, operating

-20…+55 °C (-4…+131 °F)

Technical documents (1)

• Rockwell Automation FLEX I/O selection guide 1794-SG002

Key features

• Capacity for 8 I/O modules
• Nominal 24V DC power supply input
• Operating voltage range 19.2 to 31.2V DC
• Isolation tested at 850V DC for 1 s
• Operating temperature -20 to +55 °C

About the Allen-Bradley 1794-ASB

The 1794-ASB is a FLEX remote I/O adapter for 8 I/O modules, discontinued on 3/31/2015 (selection guide 1794-SG002). It takes 24V DC nominal, 19.2 to 31.2V DC including 5% AC ripple, with a 330 mA current load and 7.9 W at 24V. It measures approximately 87 x 68 x 69 mm (HxWxD) and works from -20 to +55 °C.

What is the 1794-ASB used for?

It is the head of a FLEX I/O node on a remote I/O network, connecting up to 8 I/O modules to the scanner. Isolation from user power to system is tested at 850V DC for 1 s.

Lifecycle and successor

Discontinued (Rockwell Automation lifecycle status, discontinued 3/31/2015, checked 24 October 2026).

Before you order

What to photograph or confirm so the right unit is quoted.

Read the catalog number 1794-ASB, the series letter and the firmware revision from the label. Send us a photo of the label and we confirm the match before we quote.