Allen-Bradley 1734-OB8E

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1734-OB8E

Type

Digital output module

Application

I/O module

Used with

POINT I/O adapters and terminal bases

Temperature

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):

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

IEC60068-2-27 (Test Ea, Unpackaged Shock): 30 g

Shock

IEC60068-2-27 (Test Ea, Unpackaged Shock): 50 g

Emissions

IEC 61000-6-4

North American

T4

Enclosure type

None (open-style)

Mounting type

DIN rail

Number of outputs

8 (1 group of 8), sourcing

Diagnostics

Yes

Voltage, on-state, nom

24V DC

Voltage, on-state range

10…28.8V DC

Voltage, on-state drop

0.2V DC

Voltage, off-state, max

28.8V DC

Current, on-state, min

1.0 mA per channel

Current leakage, off

0.5 mA

Output filter time

0.1 ms

Output current rating

1.0 A per channel, 3.0 A max per module

Surge current

2 A for 10 ms, repeatable every 3 s

POINTBus current, max

75 mA @ 5V DC

Power dissipation, max

2.0 W @ 28.8V DC

Thermal dissipation, max

6.8 BTU/hr @ 28.8V DC

Isolation voltage

50V (continuous), Reinforced insulation, Type tested at 2500V DC for 60 s, field-side to system

Terminal base unit

1734-TB, 1734-TBS, 1734-TB3, 1734-TB3S, 1734-TOP, 1734-TOPS, 1734-TOP3, or 1734-TOP3S

Technical documents (1)

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

Key features

• Eight sourcing outputs in one group of 8
• Electronically protected outputs with diagnostics
• 3.0 A maximum per module
• On-state voltage range of 10…28.8V DC
• Used with 1734-TB or 1734-TOP terminal base units

About the Allen-Bradley 1734-OB8E

The 1734-OB8E is a POINT I/O 24V DC 8 channel source output module with electronic protection. Its nominal on-state voltage is 24V DC (range 10…28.8V DC), and outputs are rated 1.0 A per channel, 3.0 A max per module. It is open-style for DIN rail mounting and draws up to 75 mA at 5V DC from the POINTBus.

What is the 1734-OB8E used for?

It drives eight sourcing digital outputs in one group within a POINT I/O system, with diagnostics. Surge current is 2 A for 10 ms, repeatable every 3 s, and the output filter time is 0.1 ms. It fits the 1734-TB, 1734-TBS, 1734-TB3, 1734-TB3S, 1734-TOP, 1734-TOPS, 1734-TOP3 or 1734-TOP3S terminal base.

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-OB8E, 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.