1734-TOP3 | Allen-Bradley POINT I/O Terminal Base, Screw Clamp, 12 Terminations
1734-TOP3 | Allen-Bradley POINT I/O Terminal Base, Screw Clamp, 12 Terminations
1734-TOP3 | Allen-Bradley POINT I/O Terminal Base, Screw Clamp, 12 Terminations
    1734-TOP3 | Allen-Bradley POINT I/O Terminal Base, Screw Clamp, 12 Terminations
1734-TOP3 | Allen-Bradley POINT I/O Terminal Base, Screw Clamp, 12 Terminations

1734-TOP3 | Allen-Bradley POINT I/O Terminal Base, Screw Clamp, 12 Terminations

Part #: 1734-TOP3 Manufactured by: Allen-Bradley
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$40.00
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$40.00
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Product Overview
Allen Bradley 1734-TOP3 POINT I/O One-piece Terminal Base, Screw Clamp, 12 Terminations
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Product Description P/N: 1734-TOP3

Description / Specifications

Description 

The Allen-Bradley 1734-TOP3 is a POINT I/O Terminal Base. It has 12 Positions and a Clamp Type of Screw-Clamp.

 

Technical Specifications 

 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number 1734-TOP3
Series POINT I/O
Module Type Terminal Base
Positions 12
Clamp Type Screw-Clamp

  

 

Information About 1734-TOP3

The Allen-Bradley 1734-TOP3 is a POINT I/O Terminal Base. Implemented as an integrated terminal block, this terminal base (which comes in one piece) is a 12-terminal screw-clamp terminal base used for fast and efficient wiring of industrial automation field devices such as sensors and switches to the POINT I/O system. Vertical or horizontal mounting directly on the DIN-rail is possible, with this terminal base forming backplane communication connections and distributing its field power bus. Incorrect installation of this Input/Output module can be prevented through the use of a mechanical keying setting on the base of this terminal, and its tool-less assembly process is simple and easy to follow.

The main components of this unit are its wiring block, its handle, the interlocking side pieces, the base, its Mechanical Keying, and a DIN-rail Locking Screw (Orange).

The hardware of the 1734-TOP3 terminal base can be described as having  a field power bus voltage supply of 28.8 Volts of DC power or 120 to 240 Volts of AC, with a supply voltage of up to 300 Volts maximum, a maximum terminal current of 8A, a total unit size of around  49 x 12 x 168 millimeters (1.93 x 0.47 x 6.61 inches) while weighing around 79.2 grams (2.79 ounces), with a 0.25 to 2.5 millimeter wire size, (that is 22 to 14 AWG), and a screw torque of 0.6 Nm.

Use the following procedure to install the 1734-TOP3 terminal base: position the base just above the existing units, such as power supplies, and slip the base down. This will interlock its side pieces to the adjacent unit. Press the module firmly to the DIN rail until the terminal base falls into place. The locking screw must come to a horizontal position before the insertion of an I/O module. On its mechanical keying, select the number that matches the I/O module that is meant to be installed. This procedure prevents incorrect installation of an I/O module.

The POINT I/O is electrically connected to the ground over the DIN rail to the frame. Proper grounding can be achieved with a zinc plated yellow-chromate steel DIN rail. The connecting pins are labeled with the numbers 0 to 11, with their connection being determined by the I/O that will be used. No more than two conductors should be wired on any pin.

The 1734-TOP3 terminal base compatible modules are (Mechanical keying in parenthesis): (1) 1734-IB2,1734-OB8E, 1734-IB8, 1734-IB4, 1734-IV2, 1734-IV8, 1734-IV4,1734-OV8E, 1734-OB2, 1734-OB4, 1734-OB8, 1734-OB2E, 1734-OB4E, 1734-OB2EP, 1734-OV2E, 1734-OV4E; (3) 1734-IE2C, 1734-IE2V; (4) 1734-OE2V,1734-OE2C; (5) 1734-CTM, 1734-VTM; (7) 1734-OW2, 1734-OX2, 1734-OW4; (8) 1734-IA4, 1734-IA2, 1734-IM2, 1734-OA2, 1734-IM4, 1734-OA4.


Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1734-TOP3
Question: What is the function of the 1734-TOP3 terminal base?
Date Update:19/06/2025
Answer:

The 1734-TOP3 serves as the wiring interface between field devices and POINT I/O modules. It provides a secure screw-clamp terminal system with 12 positions, allowing sensors, switches, and actuators to connect directly to I/O modules. It also distributes field power and establishes backplane communication when snapped onto the DIN rail. Its one-piece design simplifies installation and improves wiring consistency.

Question: What is the difference between 1734-TB3 and 1734-TOP3?
Date Update:19/06/2025
Answer:
  • Terminal Type: 1734-TB3 uses spring-clamp connections, while 1734-TOP3 uses screw-clamp terminals.
  • Wiring Method: Spring clamps allow tool-free push-in wiring; screw clamps require a screwdriver to secure the wire.
  • Installation Speed: TB3 offers faster wiring, especially in high-volume applications, while TOP3 takes more time but provides a firmer hold.
  • Maintenance Style: TB3 is better for systems where frequent rewiring may occur; TOP3 is more suitable for stable, permanent setups.
  • Vibration Resistance: TOP3 holds better in environments with vibration, as screws provide a tighter connection than springs.
  • Wire Compatibility: Both support 0.25 to 2.5 mm² wires, but TB3 works best with ferruled or solid wires, while TOP3 is also suitable for bare-stranded conductors.
  • Preferred Use Case: TB3 is commonly chosen for fast, modern installations; TOP3 is used where rugged, secure connections are a priority.
Question: How much power does a 1734-TOP3 use?
Date Update:19/06/2025
Answer:

The 1734-TOP3 itself does not consume power actively. As a terminal base, it serves as a passive connection point between field wiring and POINT I/O modules. Power is consumed by the I/O module mounted on it, not by the base itself. However, it supports systems with field power up to 28.8V DC or 120–240V AC and terminal currents up to 8 A.

Question: How much does a 1734-TOP3 weigh?
Date Update:19/06/2025
Answer:

The 1734-TOP3 weighs approximately 79.2 grams, or 2.79 ounces. Its compact and lightweight design makes it ideal for space-constrained control cabinets and large distributed I/O systems where multiple bases are installed side-by-side.

Question: Which modules are compatible with 1734-TOP3?
Date Update:19/06/2025
Answer:

Compatible POINT I/O modules include:

  • Digital: 1734-IB2, IB4, IB8, OB2, OB4, OB8, OB8E, OV8E
  • Analog: 1734-IE2C, IE2V, OE2C, OE2V
  • Specialty: 1734-CTM, VTM
  • Relay: 1734-OW2, OX2, OW4
  • AC modules: 1734-IA2, IA4, IM2, IM4, OA2, OA4

Each has defined mechanical keying settings.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1734-TOP3 is a POINT I/O Terminal Base. It has 12 Positions and a Clamp Type of Screw-Clamp.

 

Technical Specifications 

 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number 1734-TOP3
Series POINT I/O
Module Type Terminal Base
Positions 12
Clamp Type Screw-Clamp

  

 

Information About 1734-TOP3

The Allen-Bradley 1734-TOP3 is a POINT I/O Terminal Base. Implemented as an integrated terminal block, this terminal base (which comes in one piece) is a 12-terminal screw-clamp terminal base used for fast and efficient wiring of industrial automation field devices such as sensors and switches to the POINT I/O system. Vertical or horizontal mounting directly on the DIN-rail is possible, with this terminal base forming backplane communication connections and distributing its field power bus. Incorrect installation of this Input/Output module can be prevented through the use of a mechanical keying setting on the base of this terminal, and its tool-less assembly process is simple and easy to follow.

The main components of this unit are its wiring block, its handle, the interlocking side pieces, the base, its Mechanical Keying, and a DIN-rail Locking Screw (Orange).

The hardware of the 1734-TOP3 terminal base can be described as having  a field power bus voltage supply of 28.8 Volts of DC power or 120 to 240 Volts of AC, with a supply voltage of up to 300 Volts maximum, a maximum terminal current of 8A, a total unit size of around  49 x 12 x 168 millimeters (1.93 x 0.47 x 6.61 inches) while weighing around 79.2 grams (2.79 ounces), with a 0.25 to 2.5 millimeter wire size, (that is 22 to 14 AWG), and a screw torque of 0.6 Nm.

Use the following procedure to install the 1734-TOP3 terminal base: position the base just above the existing units, such as power supplies, and slip the base down. This will interlock its side pieces to the adjacent unit. Press the module firmly to the DIN rail until the terminal base falls into place. The locking screw must come to a horizontal position before the insertion of an I/O module. On its mechanical keying, select the number that matches the I/O module that is meant to be installed. This procedure prevents incorrect installation of an I/O module.

The POINT I/O is electrically connected to the ground over the DIN rail to the frame. Proper grounding can be achieved with a zinc plated yellow-chromate steel DIN rail. The connecting pins are labeled with the numbers 0 to 11, with their connection being determined by the I/O that will be used. No more than two conductors should be wired on any pin.

The 1734-TOP3 terminal base compatible modules are (Mechanical keying in parenthesis): (1) 1734-IB2,1734-OB8E, 1734-IB8, 1734-IB4, 1734-IV2, 1734-IV8, 1734-IV4,1734-OV8E, 1734-OB2, 1734-OB4, 1734-OB8, 1734-OB2E, 1734-OB4E, 1734-OB2EP, 1734-OV2E, 1734-OV4E; (3) 1734-IE2C, 1734-IE2V; (4) 1734-OE2V,1734-OE2C; (5) 1734-CTM, 1734-VTM; (7) 1734-OW2, 1734-OX2, 1734-OW4; (8) 1734-IA4, 1734-IA2, 1734-IM2, 1734-OA2, 1734-IM4, 1734-OA4.


Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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