Installation Instructions · Publication 1734-IN028 · Rockwell Automation

POINT I/O One-piece Wiring Bases Installation Instructions (1734-TOP, TOPS, TOP3, TOP3S)

This document is the installation instructions for the Allen-Bradley POINT I/O one-piece wiring bases, catalog numbers 1734-TOP and 1734-TOPS (8-position wiring block) and 1734-TOP3 and 1734-TOP3S (12-position wiring block). The TOP and TOP3 have screw terminals with a specified screw torque; on the TOPS and TOP3S the wire is latched and released with a bladed screwdriver. It covers wire preparation with and without ferrules, DIN rail installation and removal, and the environmental, general and certification specifications. This is Publication 1734-IN028G-EN-P, January 2025.

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0.25…2.5 mm² Wire Size
10 A Field Power Bus Current, max
2 A Signal Terminal Current
-20…+55 Operating Temperature

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Specifications

Electrical Specifications

Field power bus supply voltage 28.8V DC, 120/240V AC
Field power bus supply current, max 10 A
Signal terminal voltage 28.8V DC, 120/240V AC
Signal terminal current 2 A
Isolation voltage Capable of 240V (continuous), Reinforced Insulation Type, or the lesser of the installed module
Wire category Determined by the installed module

Wiring

Wire size (without ferrule) 0.25…2.5 mm² (24…14 AWG), 1 wire per terminal
Strip length (without ferrule) 12 mm (0.47 in.), 8-position and 12-position wiring blocks
Wire size (with ferrule) 0.50…0.75 mm² (20…18 AWG) or 1.0…1.5 mm² (17…16 AWG), 1 wire
Strip length (with ferrule) 14 mm (0.55 in.) for 20…18 AWG; 15 mm (0.59 in.) for 17…16 AWG
Ferrule sleeve length 12 mm (0.47 in.); ferrule with insulating collar per DIN 46228-4 and UL 486F; TWIN ferrules not recommended
Wire type Solid or stranded copper rated 75 °C (167 °F) or higher, 1.2 mm (3/64 in.) insulation max
Terminal base screw torque 0.4 N•m (3.5 lb•in), 1734-TOP and 1734-TOP3 only
Wire latch release (TOPS, TOP3S) Bladed screwdriver, catalog number 1492-N90 (3 mm blade), inserted at approximately 97°

Mechanical Specifications

Dimensions (H x W x D), 1734-TOP, TOPS 49 x 12 x 144 mm (1.93 x 0.47 x 5.67 in.)
Dimensions (H x W x D), 1734-TOP3, TOP3S 49 x 12 x 168 mm (1.93 x 0.47 x 6.61 in.)
Weight 1734-TOP 63.8 g (2.25 oz); 1734-TOPS 55.68 g (1.96 oz); 1734-TOP3 79.2 g (2.79 oz); 1734-TOP3S 66.8 g (2.36 oz)
Enclosure type rating None (open-style)
DIN rail Allen-Bradley 199-DR1; 46277-3; EN 50022, zinc-plated chromate-passivated steel

Environmental Specifications

Operating temperature -20…+55 °C (-4…+131 °F) (IEC 60068-2-1, 60068-2-2, 60068-2-14)
Surrounding air temperature, max 55 °C (131 °F)
Non-operating temperature -40…+85 °C (-40…+185 °F)
Relative humidity 5…95% noncondensing (IEC 60068-2-30)
Vibration 5 g @ 10…500 Hz (IEC 60068-2-6)
Shock, operating 30 g (IEC 60068-2-27)
Shock, nonoperating 50 g (IEC 60068-2-27)

Catalog Number Format

How to read an Allen-Bradley 1734 catalog number. Each position encodes a specific configuration attribute.

Position
Meaning
Example
1734-TOP
One-piece wiring base, 8-position wiring block, screw terminals
1734-TOP
Suffix S
Latching wire terminals released with a bladed screwdriver (no screw torque)
1734-TOPS
Suffix 3
12-position wiring block (longer base, 168 mm deep)
1734-TOP3, 1734-TOP3S

Certifications & Compliance

c-UR-us: UL Recognized Component Industrial Control Equipment, certified for US and Canada (UL File E65584) CE: European Union 2014/35/EU LVD, compliant with EN 61131-2 (Clause 11); European Union 2011/65/EU RoHS, compliant with EN IEC 63000 Morocco: Arrêté ministériel n° 6404-15 du 1er muharram 1437 UKCA: 2016 No. 1101 Electrical Equipment (Safety) Regulations; 2012 No. 3032 Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations

Document Contents

Full PDF covers the following topics in detail:

  • Summary of Changes
  • Environment and Enclosure
  • Prevent Electrostatic Discharge
  • About the Wiring Base
  • Prepare the Wires
  • Install the Wiring Base
  • Remove a Wiring Base
  • Environmental Specifications
  • General Specifications
  • Certifications
  • Additional Resources

In-Stock Products Covered by This Document

Every product below is in stock at our Charlotte, NC warehouse and covered by this publication. Ships same-day (orders before 4 PM ET) with 2.5-year warranty included.

1734-TOP
1734-TOP
Allen-Bradley 1734-TOP POINT I/O One-Piece Terminal Base, 8…
$39.99

Frequently Asked Questions

What is the difference between the 1734-TOP, TOPS, TOP3 and TOP3S?
All four are POINT I/O one-piece wiring bases. The 1734-TOP and 1734-TOPS have an 8-position wiring block; the 1734-TOP3 and 1734-TOP3S have a 12-position wiring block. On the S versions the wire is latched and released with a bladed screwdriver (catalog number 1492-N90); the TOP and TOP3 use screw terminals tightened to 0.4 N•m (3.5 lb•in).
What wire sizes do the one-piece wiring bases accept?
Without a ferrule, 0.25…2.5 mm² (24…14 AWG) solid or stranded copper, one wire per terminal, stripped 12 mm (0.47 in.). With a ferrule, 0.50…0.75 mm² (20…18 AWG) or 1.0…1.5 mm² (17…16 AWG). Wire must be rated 75 °C (167 °F) or higher with 1.2 mm (3/64 in.) insulation max. Do not wire more than 2 conductors on any single terminal.
How much current can the wiring base carry?
The field power bus is rated 10 A maximum, and each signal terminal is rated 2 A, at 28.8V DC or 120/240V AC.
How do I remove a one-piece wiring base from the DIN rail?
First remove the module installed to the right of the base: squeeze its locking mechanism and pull it up. Then turn the orange DIN rail locking screw to the vertical position to unlock the base and slide it up to release it from its mating units. Do not remove or replace a base while power is applied.
What DIN rail should I use?
Allen-Bradley part number 199-DR1 (46277-3, EN 50022). The base is grounded through the DIN rail, so use zinc-plated chromate-passivated steel rail, secured about every 200 mm (7.8 in.) with end anchors.

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