Product Overview
The Allen‑Bradley 1790D‑T16BV0 is a 16‑point DC input base block from the CompactBlock™ LDX family of distributed I/O modules, designed to provide a cost‑effective and space‑efficient solution for light industrial automation environments . This module integrates 16 universal digital input channels and a built‑in DeviceNet™ network adapter into a single, compact base block, enabling direct connection of field devices such as pushbuttons, limit switches, and proximity sensors to a DeviceNet network without the need for additional communication modules or complex wiring schemes . The 1790D‑T16BV0 is part of the Bulletin 1790D product line, which offers a streamlined distributed I/O architecture that significantly reduces installation time and system cost compared to traditional rack‑based I/O configurations.
Engineered for simplicity and reliability, the Allen‑Bradley 1790D‑T16BV0 is available in Series A and Series B versions with a Revision C01 hardware specification, and features a rugged IP20 open‑style enclosure suitable for control cabinet mounting . The module supports both sinking and sourcing input wiring configurations, providing exceptional flexibility for connecting a wide variety of 24V DC field devices . Powered directly from the DeviceNet network or a 24V DC field power supply, the 1790D‑T16BV0 eliminates the need for a separate power supply module, further simplifying system design. It is important to note that Rockwell Automation has announced the discontinuation of the CompactBlock LDX 16 Point I/P Base Block, with a final discontinuation date of December 31, 2024, making the 1790D‑T16BV0 an increasingly important product for maintaining legacy DeviceNet‑based systems .
Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | Allen‑Bradley 1790D‑T16BV0 |
| Manufacturer | Rockwell Automation / Allen‑Bradley |
| Product Type | CompactBlock LDX 16‑Point DC Input Base Block |
| Series / Revision | Series A / Series B / Revision C01 |
| Number of Inputs | 16 universal DC inputs (2 groups of 8, COM internally connected) |
| Input Voltage | 24V DC nominal (12‑30V DC operating range) |
| Input Configuration | Sinking or Sourcing (universal, configurable per group) |
| Communication Protocol | DeviceNet (built‑in adapter) |
| Network Node Address | Configurable via DIP switches |
| Power Supply | 24V DC (from DeviceNet network or field power) |
| Power Consumption | 2.5 W typical |
| Input Current per Channel | ≤6 mA typical |
| Operating Temperature | 0°C to 55°C (32°F to 131°F) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
| Enclosure Type Rating | IP20 (Open Style) |
| Dimensions (W x H x D) | 114 x 51 x 44 mm (4.5″ x 2.0″ x 1.8″) |
| Weight | 0.2 kg (0.44 lbs) |
| Mounting | DIN Rail or Panel Mount |
| Wiring | Removable screw‑clamp terminal block |
| Certifications | c‑UL‑us, CE, RoHS |
| Lifecycle Status | Discontinued (effective December 31, 2024) |
Main Features and Advantages
Cost‑Effective Distributed I/O with Integrated DeviceNet Adapter
The Allen‑Bradley 1790D‑T16BV0 delivers a highly integrated distributed I/O solution by combining 16 input channels with a built‑in DeviceNet adapter within a single compact base block . This integrated architecture eliminates the need for separate network interface modules or complex cabling between discrete I/O and communication hardware, significantly reducing system cost and installation complexity. The 1790D‑T16BV0 is designed as a cost‑effective solution specifically for light industrial environments where high‑protection specifications are not required, offering an economical alternative to more feature‑rich I/O platforms while maintaining reliable performance for standard automation tasks . The device supports flexible expansion through optional digital I/O expansion blocks, allowing the 1790D‑T16BV0 to serve as the foundation for a scalable distributed I/O system that can grow with application requirements .
