Allen-Bradley 1790D-T0B16 16-Point 24V DC Sourcing Output

Allen-Bradley 1790D-T0B16 24V dc 16 Sourcing Output Base and Expansion Modules

Product Introduction

The 1790D-T0B16 from Allen‑Bradley delivers 16 discrete DC sourcing outputs in a compact form factor. You can use it as either a base module or an expansion module. Each output operates at 24V dc nominal, with an on‑state voltage range of 10V dc minimum to 28.8V dc maximum.

Moreover, the device offers fast response times. Output signal delay from off to on reaches only 0.5 ms maximum. From on to off, it takes 1.0 ms maximum. Sixteen green status indicators let you monitor every output instantly. Wiring is straightforward through a terminal block with M3.0 screws.

Technical Specifications

The 1790D-T0B16 has a maximum on‑state voltage drop of 0.5V dc. Each channel requires a minimum on‑state current of 1 mA. Off‑state leakage current stays below 0.5 mA, with an off‑state voltage maximum of 28.8V dc.

For output current ratings, each output handles 0.5 A maximum. Each common terminal supports up to 4.0 A maximum. The common type is 8 points sharing 8 COM terminals.

Regarding power, the DeviceNet supply (for base module) accepts 11…28.8V dc (24V dc nominal) and draws 1.2 W maximum at 28.8V dc. Field power requires 10…28.8V dc (24V dc nominal) and consumes 6 mA at 28.8V dc per point. Photocoupler isolation separates I/O from logic at 1250V ac rms. Field power is nonisolated.

Mechanical and Environmental Data

This module uses a terminal block wiring system with M3.0 screws. Tighten screws to 7 lb‑in maximum. Use copper or copper‑clad aluminum conductors only. The analog base module can accommodate up to two discrete expansion modules, including the 1790D-T0B16 when used as an expansion.

Installation Guidelines

First, mount the 1790D-T0B16 securely in a control cabinet. If used as a base module, connect the DeviceNet cable for communication and logic power. Next, wire the field power supply (10…28.8V dc) to the appropriate terminals. Then connect your DC loads to the 16 sourcing outputs and their corresponding COM terminals. Finally, ensure each output does not exceed 0.5 A and each common does not exceed 4.0 A.

Meanwhile, tighten all terminal screws to 7 lb‑in maximum. Avoid running output wires alongside high‑voltage cables to reduce noise interference. The module requires no calibration after installation.

Packaging List

• 1 x 1790D-T0B16 24V DC Sourcing Output Module

• 1 x terminal block connector (pre‑attached)

• Quick start guide (printed)

Note: Certificates and warranty are not included in the package.

Shipping Methods

We ship worldwide via FedEx, UPS, or DHL.

Frequently Asked Questions (FAQ)

1. What is the maximum current per output on the 1790D-T0B16?
Each output handles 0.5 A maximum. Additionally, each common terminal supports up to 4.0 A total across its eight associated points.

2. Can I use the 1790D-T0B16 as an expansion module?
Yes. This module works as either a base or an expansion unit. An analog base module can host up to two discrete expansion modules.

3. How fast does the 1790D-T0B16 switch outputs?
Turn‑on delay is 0.5 ms maximum. Turn‑off delay is 1.0 ms maximum. These fast speeds suit high‑speed automation applications.

4. What type of outputs does the 1790D-T0B16 provide?
It provides sourcing outputs. This means the output supplies positive voltage to the load when turned on.

5. Does the 1790D-T0B16 need external fusing?
While not required, a fuse per common or per output is recommended for protection against overcurrent. Use fast‑blow fuses rated appropriately.