Allen-Bradley 1734-TOP POINT I/O One-Piece Terminal Base, 8 Screw-Clamp Terminals
$144.99
30 in stock – Ships today if ordered in
Allen-Bradley 1734-TOP — The Allen-Bradley 1734-TOP is a POINT I/O (Bulletin 1734) terminal base: 1734-TOP is a one-piece 8-terminal screw-clamp wiring base for POINT I/O modules. DIN-rail mounted, open-style. Designed for distributed I/O applications where up to 63 I/O modules (with expansion power supplies) connect to a single network adapter (EtherNet/IP, DeviceNet, PROFIBUS, ControlNet). The POINT I/O platform supports removal and insertion of I/O modules under power (RIUP) and modular expansion via additional wiring bases. All accessories in the 1734 family interoperate — terminal blocks, bases, network adapters, expansion power supplies, and specialty modules.
| Product Family | Bulletin 1734 POINT I/O — One-Piece 8-Terminal Screw-Clamp Wiring Base |
| Catalog Number | 1734-TOP |
| Terminals | 8 screw-clamp |
| Construction | One-piece |
| Mounting | DIN rail, open style |
| Terminal Block | Integrated wiring block (one-piece base, no separate RTB) |
PLC Exchange is not an authorized distributor: Products ship in unopened, original manufacturer-marked packaging. See Original Packaging or Warranty for more information.
Description
Allen-Bradley 1734-TOP
The Allen-Bradley 1734-TOP is a POINT I/O (Bulletin 1734) terminal base: 1734-TOP is a one-piece 8-terminal screw-clamp wiring base for POINT I/O modules. DIN-rail mounted, open-style. Designed for distributed I/O applications where up to 63 I/O modules (with expansion power supplies) connect to a single network adapter (EtherNet/IP, DeviceNet, PROFIBUS, ControlNet). The POINT I/O platform supports removal and insertion of I/O modules under power (RIUP) and modular expansion via additional wiring bases. All accessories in the 1734 family interoperate — terminal blocks, bases, network adapters, expansion power supplies, and specialty modules.
| Module Overview | |
|---|---|
| Catalog Number | 1734-TOP |
| Product Family | Bulletin 1734 POINT I/O — One-Piece 8-Terminal Screw-Clamp Wiring Base |
| Description | 1734-TOP is a one-piece 8-terminal screw-clamp wiring base for POINT I/O modules. DIN-rail mounted, open-style. |
| Terminals | 8 screw-clamp |
| Construction | One-piece |
| Mounting | DIN rail, open style |
| Terminal Block | Integrated wiring block (one-piece base, no separate RTB) |
| POINT I/O Platform Features | |
|---|---|
| Backplane | POINTBus, 5V DC backplane power (the network adapter converts its 24V DC input to 5V DC) plus module data |
| Max Modules per Adapter | Up to 63 I/O modules; 1734-EP24DC or 1734-EPAC expansion power supplies add POINTBus current to reach (not exceed) 63 |
| Hot Swap | I/O modules can be removed/replaced under power (RIUP). Do not remove or replace the terminal base itself while power is applied |
| Mounting | 35 mm DIN rail (EN 60715) |
| I/O Module Installation | Modules plug into wiring bases; field wiring terminates on RTB |
| Compatible Network Adapters | |
|---|---|
| EtherNet/IP Single-Port | 1734-AENT / AENTK (conformal coated) |
| EtherNet/IP Dual-Port (DLR) | 1734-AENTR / AENTRK (conformal coated) |
| DeviceNet | 1734-ADN, 1734-ADNX (with subnet), 1734-PDN (individual-module) |
| PROFIBUS DP | 1734-APB |
| ControlNet | 1734-ACNR |
| Certifications | |
|---|---|
| c-UR-us | UL Recognized Component Industrial Control Equipment |
| CE | EN 61131-2 Programmable Controllers (Low Voltage Directive, Clause 11); RoHS (EN IEC 63000) |
| RCM / KC | Yes |
| Environmental Specifications | |
|---|---|
| Operating Temperature | -20…+55 °C (-4…+131 °F) — IEC 60068-2-1 / -2-2 / -2-14 |
| Maximum Surrounding Air Temperature | 55 °C (131 °F) |
| Storage Temperature | -40…+85 °C (-40…+185 °F) |
| Relative Humidity | 5…95% non-condensing — IEC 60068-2-30 (Test Db) |
| Vibration (Operating) | 5 g @ 10…500 Hz — IEC 60068-2-6 (Test Fc) |
| Shock (Operating) | 30 g — IEC 60068-2-27 (Test Ea) |
| Shock (Non-operating) | 50 g — IEC 60068-2-27 |
| Enclosure Type Rating | None (open-style) — must be installed in a suitable industrial enclosure |
| Mounting Type | 35 mm DIN rail |
| Certifications & Standards | |
|---|---|
| c-UR-us (UL Recognized Component) | UL Recognized Component Industrial Control Equipment, certified for US and Canada. UL File E65584 |
| CE Marked, Low Voltage Directive | 2014/35/EU, EN 61131-2 (Programmable Controllers, Clause 11) |
| CE Marked, RoHS Directive | 2011/65/EU, EN IEC 63000 |
| UKCA Conformity Assessment | UK Statutory Instrument 2016 No. 1101 (LVD), 2012 No. 3032 (RoHS) |
| RCM (Australia) | Australian Radiocommunications Act, AS/NZS CISPR 11 Industrial Emissions |
| KC (Korea) | Korean Registration of Broadcasting and Communications Equipment, Article 58-2 Clause 3 |
| Morocco | Arrêté ministériel n° 6404-15 du 1 er muharram 1437 |
| Mounting & Wiring | |
|---|---|
| Mounting Type | 35 mm DIN rail, horizontal or vertical — no thermal derating in either orientation |
| Terminal Base Assembly | Modules mount on 1734-TB/-TBS (8-terminal) or 1734-TB3/-TB3S (12-terminal) base assemblies — sold separately |
| One-Piece Terminal Base Option | 1734-TOP/-TOPS (8-terminal) or 1734-TOP3/-TOP3S (12-terminal) — integrated base with terminal block |
| Wire Size Range (Screw-Clamp) | 0.25…2.5 mm² (24…14 AWG) |
| Wire Size Range (Spring-Clamp) | 0.25…2.5 mm² (24…14 AWG) on 1734-TOPS one-piece bases; 0.08…2.5 mm² (28…14 AWG) applies only to the 1734-RTBS removable terminal block |
| Terminal Base Screw Torque | 0.4 N·m (3.5 lb·in), 1734-TOP and 1734-TOP3 only (spring-clamp TOPS/TOP3S have no terminal screws) |
| No-Tools System | Terminal base, RTB, and I/O module assemble and disassemble without tools |
Related Technical Topics
- One-Piece vs. Assembly Terminal Bases — One-piece bases (1734-TOP/-TOPS/-TOP3/-TOP3S) integrate the terminal block and mounting base, so there is no separate RTB to order. Assembly bases (1734-TB/-TB3 + removable RTB) allow faster field-wiring handover since the RTB can be pre-wired off the rail.
- Wire Termination — Screw-clamp (TOP/TOP3) accepts 0.25…2.5 mm² (24…14 AWG) with 12 mm strip length. Spring-clamp (TOPS/TOP3S) accepts the same 0.25…2.5 mm² (24…14 AWG) range, 12 mm strip, and has no terminal screws to torque.
- Keyswitch — Keyswitch on the base must match the installed module’s keyswitch position — prevents accidental insertion of the wrong module type. Consult 1734-UM001 User Manual for module-to-keyswitch mapping.
- Module Compatibility — The bases a module accepts are listed in that module’s own installation instructions. For example, the 8-point 24V DC input modules 1734-IB8 and 1734-IB8K mount on 1734-TB, -TBS, -TOP or -TOPS, so this 8-terminal 1734-TOP is a correct base for them; 12-terminal TB3/TB3S/TOP3/TOP3S bases are used only where a module’s specifications list them.
Source: All specifications verified against Rockwell Automation Publication 1734-SG001I-EN-P — POINT I/O Modules Selection Guide (April 2025). Module-specific content from the POINT I/O Family Overview (p. 3-4); Environmental Specifications from Table 4 (digital I/O, p. 15), Table 17 (terminal bases, p. 40), and expansion power (p. 44); Certifications from Tables 3, 9, 18 (pp. 14, 20, 40); mounting and wiring from pp. 37-39. Base-specific wiring, torque and certifications from 1734-IN028G-EN-P, POINT I/O One-piece Wiring Bases Installation Instructions (January 2025), pp. 1-2; module-to-base example from 1734-IN051N-EN-E p. 13.
PLC Exchange products ship in their unopened, manufacturer-marked Original Packaging. Because we are not an authorized distributor, we are not legally allowed to claim these items as “New”, “Factory Sealed”, or any other term that may imply such. We have over 10 years of experience working with trusted suppliers to make sure you receive the top-quality hardware you need. Items ship in their original packaging, with the same function and contents as OEM-supplied materials. PLC Exchange is an independent supplier of industrial automation products and is not affiliated with the brand manufacturer or any of its authorized distributors. All warranties are provided directly by PLC Exchange. Trademarks, logos, and brand names referenced are property of their respective owners and are used for descriptive identification only.
Disclaimer: PLC Exchange is an independent reseller and is not an authorized distributor, affiliate, licensee, partner, or agent of Allen-Bradley / Rockwell Automation. All product information on this page is compiled from publicly-available manufacturer publications, technical data sheets, and catalog sources, each of which remains the copyright of its originating manufacturer. We make no representation or warranty, express or implied, regarding the accuracy, completeness, timeliness, or fitness for any particular purpose of the specifications or descriptions shown — content may contain errors, omissions, or out-of-date information. Product images are the property of their respective manufacturers, trademark owners, and source publications, and are displayed solely for identification purposes under the nominative fair use doctrine; images are representative and may depict a different configuration or catalog variant than the exact product listed. Purchasers should independently verify specifications against the current manufacturer publication before placing an order. All product names, trademarks, service marks, and registered trademarks are the property of their respective owners, and their use does not imply endorsement or affiliation.
Technical Notes for 1734-TOP
- Mounts directly on the Compact 5000 I/O bus alongside other 5069-series modules.
- Removable terminal blocks (RTBs) allow pre-wiring before module installation.
- Module configuration is performed in Studio 5000 Logix Designer.
- All 1734-TOP units sold by PLC Exchange are tested and ship in original factory packaging.
- For application-specific questions or system compatibility verification, contact PLC Exchange technical support at [email protected] or 980-202-0882.
Alternative Part Numbers & Names for 1734-TOP
The 1734-TOP by Allen-Bradley may also be found under the following alternative names, catalog numbers, or common search variations:
- 1734TOP
- Allen Bradley 1734-TOP
- Allen-Bradley 1734-TOP
- 1734 TOP
- 1734/TOP
- POINT I/O 1734-TOP
- POINTI/O 1734-TOP
All variations refer to the same Allen-Bradley product. If you are unsure whether this is the correct part for your application, contact our team for assistance.
Additional information
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 12 × 10 × 6 in |
| warranty | 2.5 Year PLC Exchange Warranty, 30 Days worry-free return from delivery |
| upc | 612598327911 |
| mpn | 1734-TOP |
| manufacturer | Allen-Bradley |
| condition | Original Packaging |
Dimensions & Weight for 1734-TOP
| Shipping Dimensions | |
|---|---|
| Weight | 0.5 lbs |
| Length | 12 in |
| Width | 10 in |
| Height | 6 in |
| Box Dimensions (L×W×H) | 12 × 10 × 6 in |
Dimensions shown are for the shipping package. For module-level mechanical dimensions, refer to the manufacturer datasheet.
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Frequently Asked Questions
What product family does the 1734-TOP belong to?
The 1734-TOP is part of the Allen-Bradley POINT I/O family of industrial automation products.
Does the 1734-TOP include a warranty?
Yes. Every 1734-TOP sold by PLC Exchange includes a 2.5-year warranty (30 months, full replacement). Details: https://plcexchange.net/warranty-information/
What is the return policy for the 1734-TOP?
PLC Exchange offers a 30-day worry-free return policy. Eligibility and details: https://plcexchange.net/return-policy/
When will my 1734-TOP ship?
In-stock orders placed before 4 PM ET ship the same business day via free UPS Ground. Expedited options (Next Day Air, 2nd Day Air) are available at checkout.
Who manufactures the 1734-TOP?
The 1734-TOP is manufactured by Allen-Bradley. PLC Exchange is an independent reseller specializing in Allen-Bradley industrial automation products.

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