Allen-Bradley 1790D-T0B16 - High-Density Sourcing Output Module with Terminal Block

Empower your distributed control network with the Allen-Bradley 1790D-T0B16. This industrial-grade ArmorBlock module delivers 16 high-speed sourcing (PNP) digital outputs directly on your DeviceNet. Featuring a convenient screw terminal block for easy wiring, it provides reliable 0.5A switching per point to control solenoids, pilot lights, and relays. With individual channel status LEDs and robust isolation, it’s built for clear diagnostics and durable performance in demanding environments.

Why Choose This Output Module?

• Tool-Free Wiring: Screw terminal block connections simplify installation and maintenance, allowing for quick wire changes without special tools or connectors.
• High-Density Control: Manages 16 actuator points from one compact module, maximizing cabinet space and network efficiency.
• Fast & Reliable Switching: Offers rapid 0.5 ms response times for precise control and includes overload protection for long-term reliability.
• Instant Visual Status: 16 dedicated green LEDs provide real-time confirmation of each output’s command state, speeding up troubleshooting.

Complete Technical Specifications

Brand & Series: Allen-Bradley ArmorBlock (1790 Series)

Full Model Number: 1790D-T0B16

Module Type: 16-Channel Sourcing (PNP) DC Output Module

Output Configuration: 16 points, non-isolated, sourcing

Output Current: 0.5 A maximum per point, 4.0 A maximum per common group

Load Voltage Range: 10V to 28.8V DC (24V DC Nominal)

Switching Speed: Turn-ON delay: 0.5 ms max, Turn-OFF delay: 1.0 ms max

Field Power Supply: 24V DC (10V to 28.8V DC range)

DeviceNet Logic Power: 24V DC (11V to 28.8V DC)

Electrical Isolation: 1250V AC RMS (Photocoupler isolation between I/O and logic)

Wiring Connection: Screw Terminal Block (M3.0, 7 lb-in max torque)

Common Groups: 8 points per common (2 independent groups)

Status Indicators: 16 individual Green LEDs (one per output)

Wire Compatibility: Copper or copper-clad aluminum conductors.

Installation & Wiring Guide

Mount the 1790D-T0B16 module on a DIN rail. Connect a stable 24V DC field power supply. For sourcing outputs, wire your load (e.g., a solenoid valve) between the output terminal and the DC common (-) line. The module acts as a switch to the positive voltage when active. Ensure the total current for all outputs sharing a single common terminal does not exceed 4.0 Amps. For inductive loads like relay coils, install a flyback diode across the load to protect the output circuit.

Package & Warranty

What's Included: 1 x Allen-Bradley 1790D-T0B16 Sourcing Output Module with terminal block.

Our Guarantee: This product is protected by a full 12-month warranty.

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Frequently Asked Questions (FAQ)

What is the difference between this and the 1790-T0B16X model?

Both are 16-point sourcing modules with terminal blocks. The 1790D-T0B16 is a "Base" module that can also support the connection of expansion I/O modules. The "X" variant is typically a standalone unit.

Can I connect this output directly to a PLC input?

Yes. A sourcing output is ideal for driving a sinking PLC input. Connect the output to the PLC input, and connect the PLC input's common to the DC negative (-) of the shared power supply.

What happens if an output short-circuits?

The module includes electronic protection that typically limits the short-circuit current and may shut down the affected channel to prevent damage. Always use external fuses for additional safety.

How do I set the DeviceNet node address?

Use the rotary switches on the module's side to set the Node Address (MAC ID from 0 to 63) and the Communication Baud Rate (125K, 250K, or 500K) to match your network.

Is it suitable for high-speed switching applications?

With a 0.5 ms response time, it is suitable for many industrial on/off applications. For very high-speed pulse trains (kHz range), a dedicated fast output or pulse module would be more appropriate.

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