1734-OB8S
1734-OB8S
1734-OB8S
1734-OB8S
1734-OB8S
1734-OB8S
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1734-OB8S

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Allen-Bradley 1734-OB8S is an eight-channel 24 V DC current-sourcing POINT Guard I/O safety output module for distributed safety loads.
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Technical specifications for 1734-OB8S

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1734-OB8S
  • Product Family:
    Point I/O 1734
  • Product Type:
    POINT Guard I/O 8-Point Safety Source Output Module
  • Stock:
    1
  • Safety outputs:
    8 current-sourcing channels
  • Output current at 40 °C:
    1 A per point; 8 A aggregate
  • Output current at 55 °C:
    0.5 A per point; 2 A aggregate
  • Module supply:
    19.2...28.8 V DC
  • POINTBus current:
    125 mA at 5 V DC
  • Terminal-base keying:
    Left 8; right 2
  • Weight:
    0.0624 kg
  • Estimated shipping dimensions:
    7.75x2.4x5.66cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Output Derating Safe-State Checks Product Applications

Features:

  • Safety actuation: eight 24 V DC sourcing outputs
  • Thermal planning: channel and aggregate current are derated with temperature
  • CIP Safety control: output command and diagnostics share the validated safety connection
1734-OB8S places safety-rated DC actuation close to machine devices in a POINT Guard I/O node.

Its usable load capacity is governed by both ambient temperature and the combined current carried through each terminal-base power group.

Replacement work should preserve the safe-state strategy, safety network identity, load evidence, and proof-test result.

Availability of 1734-OB8S is subject to Apter Power inventory and sourcing confirmation.
Allen-Bradley 1734-OB8S POINT Guard I/O 8-Point Safety Source Output Module Manuals and Product Resources
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Allen-Bradley 1734-OB8S POINT Guard I/O 8-Point Safety Source Output Module Specs

General

  • ManufacturerAllen-Bradley
  • Model1734-OB8S
  • ConditionNew Original ready stock
  • Product FamilyPOINT I/O 1734
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Protect the safety output capacity

  • Ambient: apply the published 40...55 °C current derating.
  • Per point: verify running and inrush current for every load.
  • Aggregate: total each terminal-base group and the complete module.
  • Suppression: control inductive energy at the field device.

Prove the commanded de-energized state

  • Logic: verify the approved output data and safety task.
  • Power: confirm both field-power groups and common paths.
  • Feedback: compare external-device monitoring with the command.
  • Validation: challenge output, wiring, and contactor faults before release.

Supported product applications

  • Safety contactors: command monitored 24 V DC coils with engineered suppression.
  • Valve isolation: drive approved safety solenoids within thermal limits.
  • Distributed stops: place safety outputs near remote machine zones.
  • GuardLogix systems: exchange safety output data through a supported POINT I/O adapter.
Description
1734-OB8S provides eight current-sourcing safety outputs in the POINT Guard I/O platform. Through CIP Safety, a supported safety controller commands the output channels and receives diagnostic status while the module supervises power and channel conditions in the distributed station.

Output loading on 1734-OB8S is temperature-dependent: Rockwell Automation specifies individual and aggregate current limits that decrease toward 55 °C. Safety contactors, valves, and other 24 V DC loads therefore require verified steady-state current, inrush, suppression, and terminal-base distribution rather than a point-count-only design.

A 1734-OB8S replacement must match the approved Series and firmware, safety network number, output data format, power-group wiring, terminal-base keying, and safe-state logic. After installation, prove de-energization, commanded operation, fault detection, and machine stopping performance under the site safety procedure.
Revisions

Revision Part #

Also known as

1734-OB8S Series A
1734-OB8S/A, Series A
1734-OB8S Series B
1734-OB8S/B, Series B
Alternative Names
Allen-Bradley 1734-OB8S Rockwell Automation 1734-OB8S AB 1734-OB8S 1734OB8S 1734 OB8S POINT Guard I/O eight-channel safety output
Technical notes
For 1734-OB8S, the highest design risk is exceeding a channel or aggregate current limit as ambient temperature rises. Confirm Series and firmware, 24 V DC power groups, load inrush, suppression, output pairing, terminal-base current, safety network number, configured safe state, and the validated de-energization test before the machine is returned to service.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How does ambient temperature change the allowable load on 1734-OB8S?
Use the published derating from 1 A per point at 40 °C to 0.5 A at 55 °C and recalculate the aggregate terminal-base current.
What should be checked when one 1734-OB8S output reports a fault but its paired load is healthy?
Inspect the individual channel, power-group common, short-circuit path, load wiring, suppression, configured output data, and diagnostic status before resetting.
Can 1734-OB8S drive eight one-ampere loads in a 55 °C enclosure?
No. At 55 °C the per-point and aggregate limits are lower, so the actual simultaneous load plan must be reduced or redesigned.
Why should feedback contacts be tested after 1734-OB8S is replaced?
The safety function may rely on external-device monitoring to confirm contactors or valves reached the commanded safe state; module output status alone cannot prove that.
Which project records must remain aligned with 1734-OB8S after firmware service?
Keep the hardware Series, firmware, safety network number, module definition, output data choice, safety signature, load map, and validation report together.
What details should a trader include when requesting 1734-OB8S for an outage?
Send nameplate photos, Series and firmware, quantity, terminal base, load type and current, controller and adapter models, destination, and the outage delivery date.