Allen-Bradley 1734-OB8S

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1734-OB8S

Type

Digital output module

Application

I/O module

Used with

POINT I/O adapters and terminal bases

Temperature, operating

IEC 60068-2-1 (Test Ad, Operating Cold), IEC 60068-2-2 (Test Bd, Operating Dry Heat), IEC 60068-2-14 (Test Nb, Operating Thermal Shock): -20 °C < Ta < +55 °C (-4 °F < Ta < +131 °F)

Temperature, surrounding

55 °C (131 °F)

Temperature

IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold), IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat), IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal, Shock): -40…+85 °C (-40…+185 °F)

Relative humidity

IEC 60068-2-30 (Test Db, Unpackaged Damp Heat): 5…95% noncondensing

Vibration

IEC 60068-2-6 (Test Fc, Operating): 5 g @ 10…500 Hz

Shock, operating

IEC 60068-2-27 (Test Ea, Unpackaged Shock): 30 g

Shock, nonoperating

IEC 60068-2-27 (Test Ea, Unpackaged Shock): 50 g

Corrosives

G2 (ISA S71.04)

Temp code

T4

Enclosure type rating

None (open-style)

Terminal base unit

1734-TB, 1734-TBS, 1734-TOP, 1734-TOPS, 1734-TOP3, or 1734-TOP3S

Wiring category

2 - on signal ports

Keyswitch positions

8 2

Technical documents (1)

• Rockwell Automation POINT I/O selection guide 1734-SG001

Key features

• 8 channel safety sourcing output module
• Terminal bases: 1734-TB, 1734-TBS, 1734-TOP, 1734-TOPS, 1734-TOP3, 1734-TOP3S
• Nonoperating temperature range of -40…+85 °C
• Operating shock 30 g, nonoperating shock 50 g
• Open-style enclosure with temperature code T4

About the Allen-Bradley 1734-OB8S

The 1734-OB8S is an 8 channel safety sourcing output module for POINT I/O. It operates at -20 °C < Ta < +55 °C, with a surrounding temperature of 55 °C and relative humidity of 5…95% noncondensing. It is rated for 5 g vibration at 10…500 Hz, G2 (ISA S71.04) corrosives and temperature code T4, in an open-style housing with no enclosure type rating.

What is the 1734-OB8S used for?

It provides safety sourcing outputs in a POINT I/O system and sits on a 1734-TB, 1734-TBS, 1734-TOP, 1734-TOPS, 1734-TOP3 or 1734-TOP3S terminal base. Its signal ports are wiring category 2.

Lifecycle and successor

Active (Rockwell Automation lifecycle status, checked 24 October 2026).

Before you order

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

Read the catalog number 1734-OB8S, 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.