1734-OW4
1734-OW4
1734-OW4
1734-OW4
1734-OW4
1734-OW4
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    Apter Power evaluates relay-duty and suppression evidence, confirms condition, and prepares official documentation for quotation.

1734-OW4

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Allen-Bradley 1734-OW4 is a four-point Form A isolated relay output module for dry-contact switching in POINT I/O systems.
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Technical specifications for 1734-OW4

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1734-OW4
  • Product Family:
    Point I/O 1734
  • Product Type:
    POINT I/O 4-Point Relay Output Module
  • Stock:
    1
  • Revision:
    Series D
  • Output architecture:
    4 Form A isolated normally open relays
  • Contact design:
    Dry contact; no onboard snubbers
  • POINTBus current:
    90 mA at 5 V DC
  • Keyswitch position:
    7
  • Weight:
    0.0425 kg
  • Estimated shipping dimensions:
    5.66x1.21x7.75cm
  • Tariff Code:
    8537101190
  • Country of origin:
    Singapore
  • 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 Relay Load Planning Contact Life Checks Product Applications

Features:

  • Relay architecture: four isolated Form A normally open outputs
  • Load flexibility: official AC and DC contact ratings support mixed maintenance needs
  • Protection boundary: inductive loads require external suppression
1734-OW4 is selected when POINT I/O needs isolated dry-contact switching rather than a semiconductor source output.

Its four contact sets, relay duty, and absence of onboard snubbers define the main engineering checks for a replacement.

Series, terminal-base wiring, and keyswitch position should be reconciled before the module is issued to an outage.

Availability of 1734-OW4 is subject to Apter Power inventory and sourcing confirmation.
Allen-Bradley 1734-OW4 POINT I/O 4-Point Relay 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-OW4 POINT I/O 4-Point Relay Output Module Specs

General

  • ManufacturerAllen-Bradley
  • Model1734-OW4
  • 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.

Plan the switched load

  • Load category: identify AC or DC duty before selecting the contact rating.
  • Inductive devices: place an appropriate suppressor across the load.
  • Switching rate: keep operation within the official relay-duty limit.
  • Isolation: preserve separation between the four contact sets in field wiring.

Protect relay service life

  • Baseline: record the original load and operating frequency.
  • Symptoms: investigate welded, high-resistance, or intermittent contacts by channel.
  • Suppression: inspect the external device when repeated relay wear occurs.
  • Handover: document contact operation after the controlled functional test.

Supported product applications

  • Dry-contact switching: operate isolated field circuits from POINT I/O logic.
  • Mixed-voltage panels: use separate contact sets within the published ratings.
  • Interposing control: switch contactors, relays, or signaling loads with suitable suppression.
  • Maintenance replacement: restore a four-channel relay-output position using the documented wiring base.
Description
1734-OW4 provides four Form A isolated, normally open electromechanical relay outputs in the POINT I/O platform. Rockwell Automation specifies dry contacts without onboard snubbers, so the connected load and suppression method remain installation decisions.

At rated load, 1734-OW4 supports AC or DC switching while keeping the four contact sets isolated. The official instructions require external suppression across inductive loads to extend relay life and reduce switching transients.

For maintenance planning, 1734-OW4 should be matched by its complete catalog number, Series D record, terminal-base selection, keyswitch position, and load duty. Contact-life evidence is more useful than a generic digital-output comparison when a relay channel is being replaced.
Revisions

Revision Part #

Also known as

1734-OW4 Series C
1734-OW4/C, Series C
1734-OW4 Series D
1734-OW4/D, Series D
Alternative Names
Allen-Bradley 1734-OW4 Rockwell Automation 1734-OW4 AB 1734-OW4 1734OW4 1734 OW4 POINT I/O 1734-OW4 relay output module
Technical notes
The principal risk with 1734-OW4 is applying a relay contact without checking load type, switching duty, and external suppression. Confirm the complete Series D identity, terminal-base wiring, keyswitch position, AC or DC contact rating, inductive-load protection, and expected operating frequency before commissioning or replacing a channel.
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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 should 1734-OW4 be applied to an inductive contactor load?
Use an external suppressor across the inductive device, keep the contact within its official load rating, and verify the switching frequency before service.
Which evidence helps diagnose shortened contact life on 1734-OW4?
Record the affected channel, load current, switching frequency, suppression condition, contact resistance symptoms, and whether arcing or welded contacts are present.
Can 1734-OW4 replace a solid-state source output without an engineering review?
No. Its isolated dry relay contacts behave differently from a transistor source output, so field voltage, load duty, response, and protection must be reviewed.
What should be checked when commissioning 1734-OW4 on an existing terminal base?
Confirm the Series D module identity, supported base, keyswitch position 7, field wiring, contact supply, load suppression, and channel operation.
Why can a channel on 1734-OW4 switch AC or DC but still require separate load calculations?
The module publishes different contact duties for AC and DC circuits, and electrical life depends on the actual load and switching conditions.
How can a technician isolate an intermittent field problem from a 1734-OW4 relay fault?
Compare commanded state with contact continuity, inspect wiring and suppression, test the load independently, and repeat the check under the normal switching duty.

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