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Match the complete marking
Match 1734-EP24DC and its hardware series to the installed POINT I/O station; retain the complete catalog identity.
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Check the offered item before ordering
Review actual label, terminal-block and latch photos, and confirm the included parts and documents in the quotation.
Technical specifications for 1734-EP24DC
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Manufacturer:Allen-Bradley
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Product Category:PLC Systems
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Spare Part Number:1734-EP24DC
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Weight:0.15 kg
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Tariff Code:8537101190
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Product series:POINT I/O 1734
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Module function:24V DC expansion power supply
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Nominal input voltage:24V DC
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Input voltage range:10 to 28.8V DC
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Field-side input requirement:400 mA maximum at 24V DC
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Maximum inrush current:6 A for 10 ms
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POINTBus current, horizontal:1 A at 10 to 19.2V input; 1.3 A at 19.2 to 28.8V input
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POINTBus current, vertical:1 A at 10 to 28.8V input
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Field-power bus current:10 A maximum
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I/O module capacity:4 to 17 modules, depending on each module current rating
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Maximum power consumption:9.8 W at 28.8V DC
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Maximum power dissipation:3.0 W at 28.8V DC
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Isolation voltage:50V continuous; tested at 2600V DC for 60 s
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Operating temperature:-20 to +55 °C
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Relative humidity:5 to 95%, noncondensing
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Terminal screw torque:0.6 N·m (7 lb·in)
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Conductor range:22 to 14 AWG copper, rated at least 75 °C
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Enclosure type:Open-style; suitable enclosure required
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Status indicators:Green system-power and field-power indicators
Information
Overview
Downloads
Applications / Compatibility
Product Precautions
- Allen-Bradley 1734-EP24DC divides a POINT I/O station into manageable power segments. Plan its location where the downstream module-current budget or field-power grouping requires a new supply boundary.
Product type: POINT I/O expansion power supply
Nominal input voltage: 24 V DC
Field power: Independent downstream segment
POINTBus current: Mounting-dependent rating
Nominal input voltage: 24 V DC
Field power: Independent downstream segment
POINTBus current: Mounting-dependent rating
The module passes field power to modules on its right while extending the backplane power available to that segment. Input and output groups, analog and digital groups, or modules serving a specific function can be partitioned.
Check the actual input voltage and orientation when calculating the POINTBus load. The field bus supports up to 10 A, while the backplane output has a separate 1 A or 1.3 A limit.
Check the actual input voltage and orientation when calculating the POINTBus load. The field bus supports up to 10 A, while the backplane output has a separate 1 A or 1.3 A limit.
Controller platform reference: Allen-Bradley POINT I/O power expansion. Match the adapter, module loads and field-voltage segments.
Technical downloads for Allen-Bradley 1734-EP24DC: a manufacturer technical excerpt and an Apter Power installation and commissioning guide.
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Allen-Bradley 1734-EP24DC technical reference
Original manufacturer excerpt - PDF, 5 pages. POINT I/O power segmentation, mounting, wiring, status indicators and electrical specifications. -
Allen-Bradley 1734-EP24DC installation guide
Prepared by Apter Power - PDF, 5 pages. Current budgeting, terminal checks, DIN-rail installation, power-up verification and service diagnostics.
The technical reference preserves selected manufacturer pages. The installation guide is compiled by Apter Power for preparation and review; apply the original operating procedures and site controls during work.
System integration: Use 1734-EP24DC with POINT I/O adapters to extend the downstream power segment. Calculate module current and observe adapter and station limits.
Power partitioning: The module separates field power to its left from the new segment on its right. Select the grouping by signal type or machine function and retain the required field voltage.
Power partitioning: The module separates field power to its left from the new segment on its right. Select the grouping by signal type or machine function and retain the required field voltage.
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POINTBus capacity expansion
Add backplane power for downstream POINT I/O modules. Total module current determines the segment capacity; check the adapter capacity and mounting-orientation limits before extending the station. -
Input and output partitioning
Separate the field-power supply for input modules from the supply for output modules. The new voltage segment begins at the expansion supply and powers modules to its right. -
Analog and digital segmentation
Organize analog and digital I/O into separately powered field segments. Keep each segment within its module voltage requirements and calculate its field-current demand. -
Function-based I/O grouping
Group modules that perform a particular machine function on a dedicated power segment. This supports a clear cabinet power layout; it does not create safety-rated isolation or replace circuit protection.
Install Allen-Bradley 1734-EP24DC within its power, mounting and environmental limits. Isolate the relevant supplies and verify the downstream segment before commissioning.
Isolate the power sources
Remove applicable system and field power before installation, removal or rewiring. Do not connect 120/240V AC to the DC input; use a power source meeting the installation and regional requirements.
Calculate both power budgets
Calculate POINTBus demand and field-load demand separately. Observe the horizontal and vertical current limits; a 10 A field-power rating is not a 10 A POINTBus output rating.
Ground the DIN rail
Mount on grounded zinc-plated, chromate-passivated steel DIN rail and secure the rail and end anchors. The module grounding path depends on the rail contact.
Check the terminal assignments
Use terminals 6/7 for V, 4/5 for common and 2/3 for chassis ground; terminals 0/1 are not connected. Verify polarity and tighten terminal screws to 0.6 N·m.
Protect the open-style module
Use a suitable enclosure and keep the surrounding air between -20 and +55 °C. Protect against electrostatic discharge, condensation and contamination; hazardous locations require the applicable marked approvals and enclosure conditions.
Verify the downstream segment
Seat adjoining modules fully, cover the last exposed interconnection with the end cap and check system/field indicators. Prove the affected I/O functions under the site commissioning procedure before release.
Alternative Names
AB 1734-EP24DC
1734 EP24DC
Technical notes
Power relationship: The supply creates a new field-voltage segment and extends POINTBus power for modules to its right. Calculate field current separately from the backplane current budget.
Installation protection: Use a grounded steel DIN rail, appropriate enclosure and compliant DC source. Apply the output-current limit for the installed orientation and input voltage.
Technical reference: Rockwell Automation POINT I/O 24V DC Expansion Power Supply Installation Instructions, 1734-IN058M-EN-P, July 2026.
FAQ View All FAQ
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What changes downstream when 1734-EP24DC is inserted in a POINT I/O station?It extends POINTBus power and starts a new field-voltage segment for the modules to its right. Field power is separated from modules to its left, allowing input/output, analog/digital or function-based partitioning.
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How many modules can 1734-EP24DC supply?A segment can support 4 to 17 modules depending on their current requirements. Add the actual module currents and check the POINTBus output limit, adapter capacity and complete station configuration rather than assuming that every combination supports 17 modules.
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Why does the mounting orientation affect the 1734-EP24DC current budget?Horizontal mounting allows 1 A at 10 to 19.2V input and 1.3 A at 19.2 to 28.8V input. Vertical mounting allows 1 A across the 10 to 28.8V input range. Size the downstream POINTBus load for the installed orientation and input voltage.
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Does the 10 A rating of 1734-EP24DC describe its POINTBus output?No. The 10 A maximum applies to the field-power bus. POINTBus output is limited to 1 A or 1.3 A under the stated input-voltage and mounting conditions; calculate these two loads separately.
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Which terminals are used to continue power through 1734-EP24DC?Terminals 6 and 7 are the positive DC supply, terminals 4 and 5 are common, and terminals 2 and 3 are chassis ground. Terminals 0 and 1 are not connected. Check polarity, the field-voltage requirements of downstream modules and terminal torque before energizing.
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What should the power indicators on 1734-EP24DC show during normal operation?The system-power and field-power indicators are steady green during normal operation. An off indicator means power is not applied to that function. Check the incoming supply, terminal connections and affected power segment before investigating downstream I/O behavior.
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What identification and included items should be checked before ordering 1734-EP24DC?Request current label and terminal-block photos, and confirm the catalog number and hardware series against the installed station. Have the removable terminal block and any separately requested accessories or documents itemized in the quotation; the conformal-coated 1734-EP24DCK is a different catalog selection.
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How are availability and dispatch confirmed for an order of 1734-EP24DC?Confirm the required quantity, offered condition and dispatch date in the quotation. Agree when the lead time starts and which inspection records, accompanying documents and warranty terms apply before approving the order; product lifecycle status does not establish seller stock.
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