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Description
Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 1734-TOP3 |
| Manufacturer | Rockwell Automation / Allen‑Bradley |
| Product Type | POINT I/O One‑Piece Terminal Base |
| Number of Terminations | 12 (Screw‑Clamp) -4 |
| Mounting | DIN Rail (EN 60715) -4 |
| Dimensions (H x W x D) Approx. | 49 mm x 12 mm x 168 mm (1.93 x 0.47 x 6.61 in.) -4 |
| Weight Approx. | 79.2 g (2.79 oz) -4 |
| Wire Size | 0.25…2.5 mm² (22…14 AWG) solid/stranded copper, 75°C rating -4 |
| Supply Voltage (Terminal Max) | 300V -4 |
| Supply Current (Terminal Max) | 8A -4 |
| Isolation Voltage | Capable of 240V continuous, Reinforced Insulation -4 |
| Terminal Base Screw Torque | 0.6 Nm (7 lb‑in) -4 |
| Terminal Block Torque | 0.4 Nm (3.5 lb‑in) -4 |
| Enclosure Type Rating | None (open‑style) -4 |
Main Features and Advantages
The 1734‑TOP3 offers a range of features that streamline installation and enhance system reliability. Its modular one‑piece design integrates the wiring block and mounting base into a single unit, simplifying assembly and reducing the number of components to manage. The 12‑position screw‑clamp termination allows for secure and dependable field wiring connections, with clearly marked terminals that facilitate fast and error‑free installation -1-3. The 1734‑TOP3 is equipped with an orange DIN‑rail locking screw that provides a positive lock and visual confirmation of secure mounting, helping to prevent accidental dislodgement in vibration‑prone environments -4.
The 1734‑TOP3 also supports the Removal and Insertion Under Power (RIUP) capability of the POINT I/O system. This feature allows the I/O module to be replaced while the system remains operational, significantly reducing downtime during maintenance -5-6. The base includes mechanical keying to prevent the installation of an incorrect I/O module type, protecting both the module and the system from potential damage. Furthermore, the 1734‑TOP3 is designed to distribute the field power bus to the installed module, providing a clean and organized power distribution path without the need for additional external wiring -6. The interlocking side pieces ensure a solid mechanical connection between adjacent bases, creating a rigid, self‑supporting assembly when mounted on the DIN rail -4-5.
Application Field
The 1734‑TOP3 is used as the physical foundation for Allen‑Bradley POINT I/O modules in distributed control systems. It serves as the termination point for field wiring, connecting discrete and analog sensors, actuators, and other field devices to the POINT I/O module installed on top of it. The 1734‑TOP3 is particularly suited for applications where a higher density of field connections is required, as its 12 terminals provide more wiring capacity than the 8‑terminal 1734‑TOP base -7.
It finds broad application across various industries, including manufacturing, automotive, packaging, material handling, and process control. In these environments, the 1734‑TOP3 is often deployed alongside 1734‑ACNR ControlNet adapters, 1734‑AENT EtherNet/IP adapters, or 1734‑ADNX DeviceNet adapters to support distributed I/O architectures. The base is also used in safety applications when paired with POINT Guard I/O modules, where its 12 terminals are required to accommodate the additional wiring connections for dual‑channel safety inputs and sensor power -7. Whether mounted horizontally or vertically on a DIN rail, the 1734‑TOP3 provides a reliable and space‑efficient solution for organizing field wiring in control cabinets -5-6.
