1790D-T16BV16B Allen-Bradley I/O Module 16 Inputs 16 Outputs

1790D-T16BV16B Allen-Bradley 16-Input 16-Output DeviceNet Base Module

Product Introduction

The 1790D-T16BV16B from Allen-Bradley belongs to the CompactBlock LDX I/O family. This module serves as a distribution block for 16 universal inputs and 16 sinking outputs. It uses the DeviceNet network protocol to link field devices with the plant's central control system.

This module consolidates signals from up to 16 input points and 16 output points. All data travels through a single DeviceNet connection to the processor. As a result, you save on wiring costs and installation time. The 1790D-T16BV16B is ideal for applications that need many digital I/O points in a compact footprint.

Input Specifications

• Inputs per module: 16 points, nonisolated, sinking or sourcing

• On-state voltage: 9.6V dc min, 24V dc nom, 28.8V dc max

• On-state current: 8 mA max per point @ 28.8V dc

• Off-state voltage: 5V dc max

• Input impedance: 4.8 kΩ nominal

• Common type: 16 points / 16 COM (non-polarity)

• Indicators: 16 green status LEDs

Output Specifications

• Outputs per module: 16 points, nonisolated, sourcing

• On-state voltage: 10V dc min, 24V dc nom, 28.8V dc max

• On-state voltage drop: 0.5V dc max

• On-state current: 1 mA min per channel

• Off-state leakage: 0.5 mA max

• Output signal delay: Off to On = 0.5 ms max, On to Off = 1.0 ms max

• Output current rating: 0.5 A max per output, 4.0 A max per common

• Common type: 16 points / 16 COM

• Indicators: 16 green status LEDs

Power Requirements and Dissipation

The 1790D-T16BV16B requires two power sources.

• DeviceNet power: 24V dc nominal (voltage range 11…28.8V dc). Max power dissipation is 1.2 W @ 28.8V dc.

• Field power: 24V dc nominal (voltage range 10…28.8V dc). Power dissipation is 6 mA @ 28.8V dc per point.

Isolation and Protection

• I/O to logic: Photocoupler isolation, tested at 1250V ac rms

• DeviceNet to logic: Nonisolated

• DeviceNet power: Nonisolated

Mechanical and Environmental Specifications

• Weight: 1.00 lbs (0.45 kg)

• Operating temperature: 0…55 °C (32…131 °F)

• Relative humidity: 5…90%, noncondensing

• Operating altitude: 2000 m max

• Vibration resistance: 5g at 10…500 Hz

• ESD immunity: 8 kV air discharge (IEC 61000-4-2)

• Enclosure type rating: None (open style)

• Mounting options: DIN rail or screw mounting

• Dimensions: 52 x 104 x 42 mm (2.03 x 4.07 x 1.64 inches)

• Wiring terminal: M3.0 screw type, max torque 7 lb-in

• Conductor type: Copper or copper-clad aluminum only

Installation Guidelines

Follow these steps to install the 1790D-T16BV16B correctly.

1. Disconnect DeviceNet network power and field power before wiring.

2. Mount the module on a DIN rail or use screws for panel mounting.

3. Connect DeviceNet power (11…28.8V dc) to the designated terminals.

4. Connect field power (10…28.8V dc) to power the I/O circuits.

5. Wire input devices to the 16 input channels. Wire output loads to the 16 sinking output channels.

6. Tighten all terminal screws to 7 lb-in maximum. Do not overtighten.

7. Apply power and check the green status LEDs for each channel.

Furthermore, keep I/O wiring separate from high-voltage cables. Because this module has an open-style enclosure, install it inside a clean, dry control cabinet. Avoid locations with high humidity or airborne dust.

Packaging List

• 1790D-T16BV16B module (1 unit)

• Terminal block (factory installed)

• Quick start guide

Note: No certificates or warranty documents are included in the package.

Shipping

We ship worldwide via FedEx, UPS, or DHL. Orders are dispatched within 1-2 business days.

Frequently Asked Questions (FAQ)

1. Can the 1790D-T16BV16B accept both sinking and sourcing input devices?

Yes. The 16 universal inputs support both sinking and sourcing connections. This gives you great flexibility when wiring different field devices.

2. What is the maximum output current per common on this module?

The 1790D-T16BV16B provides 0.5 A max per output point. Each common can handle up to 4.0 A total.

3. Does this module need external cooling or ventilation?

Not usually. Maximum power dissipation is only 1.2 W, so forced ventilation is rarely required. However, install it in a cabinet with adequate airflow.

4. How do I know if an input or output is active?

Each of the 16 inputs and 16 outputs has its own green status LED. The LED turns on when the corresponding point is active.

5. Where should I install this open-style module?

Because the 1790D-T16BV16B has no enclosure rating, place it inside a clean, dry control cabinet. Avoid high humidity, dust, and airborne contaminants.