Allen-Bradley 1790D-0B16 DeviceNet CompactBlock LDX

1790D-0B16 Allen Bradley DeviceNet Output Module

Product Introduction

The 1790D-0B16 belongs to the CompactBlock LDX family from Allen‑Bradley. This DeviceNet module focuses on high‑density digital output control. It offers 16 sourcing outputs all rated at 24V DC nominal. Each output channel delivers up to 0.5 A continuously. The module connects to a DeviceNet network and supports up to 64 nodes. For easy integration, the 1790D-0B16 uses a removable 37‑pin D‑shell connector. Sixteen green LEDs show the real‑time status of every output. Consequently, this module suits packaging machines, assembly lines, and material handling systems.

Technical Specifications

Output Characteristics

The 1790D-0B16 provides 16 non‑isolated sourcing outputs. On‑state voltage ranges from 10V DC minimum to 28.8V DC maximum, with 24V DC nominal. The maximum on‑state voltage drop is only 0.5V DC. Minimum on‑state current per channel is 1 mA. Off‑state leakage stays below 0.5 mA. Output signal delay from off to on is 0.5 ms max; from on to off it is 1.0 ms max. Each output handles 0.5 A max, while each common supports 4.0 A max. The common type uses 8 points sharing one common (8 points/8 COM). Sixteen green status LEDs provide clear visual indication.

Network Interface and Communication

This module connects directly to a DeviceNet network. It supports three selectable communication rates: 125 kbps, 250 kbps, and 500 kbps. The 1790D-0B16 can communicate with up to 64 network nodes. Network termination follows standard DeviceNet practices. The module uses a 37‑pin D‑shell connector for all I/O and power wiring. This connector is removable, which simplifies maintenance and replacement.

General Electrical Data

DeviceNet power to the base module requires 24V DC nominal, with an acceptable range of 11…28.8V DC. Maximum power dissipation is 1.2 W at 28.8V DC. Field power also needs 24V DC nominal (10…28.8V DC range). Each output point dissipates up to 6 mA at 28.8V DC. Isolation between I/O and logic uses photocoupler isolation rated at 1250V AC rms. Note that DeviceNet power and logic are non‑isolated from each other.

Mechanical and Environmental Parameters

This module weighs 0.50 lbs (0.23 kg). Storage humidity is limited to 80% max (non‑condensing). The installation altitude must not exceed 1000 meters above sea level. Operating temperature range is 0…55°C (32…131°F). Storage temperature goes from -40…85°C (-40…185°F). Vibration resistance meets IEC 60068‑2‑6 (5 g at 10…500 Hz). Shock rating is 30 g. The 1790D-0B16 uses a 37‑pin D‑shell female connector on the module side.

Installation Guide

First, mount the CompactBlock LDX base onto a standard DIN rail. Next, connect the DeviceNet trunk cable to the base module’s network port. Then, slide the 1790D-0B16 onto the interlocking side rails of the base. Press firmly until the 37‑pin D‑shell connector fully engages. Secure the module with the built‑in latch. After that, wire field devices to the mating 37‑pin D‑shell connector (sold separately). Apply 24V DC field power and DeviceNet power. Finally, set the node address and baud rate using the onboard switches. Remember to power down the system before any wiring changes.

Packaging List

• 1 x 1790D-0B16 DeviceNet CompactBlock LDX module

• 1 x Removable 37‑pin D‑shell connector (male, with screws)

• 1 x Product label with serial number and MAC ID

• 1 x Quick start guide (printed)

Note: No certificates or warranty documents are included. Certificates can be downloaded from the manufacturer’s website.

Shipping Information

All orders ship via FedEx, UPS, or DHL depending on destination. A tracking number is provided within 24 hours after dispatch.

Frequently Asked Questions (FAQ)

1. Can the 1790D-0B16 work with a non‑Allen‑Bradley DeviceNet scanner?
Yes, as long as the scanner follows standard DeviceNet protocols. However, full compatibility is best achieved with Allen‑Bradley scanners like the 1756‑DNB or 1769‑SDN.

2. What happens if I draw more than 0.5 A from one output?
Exceeding 0.5 A may damage the output channel or trigger thermal shutdown. Therefore, always respect the per‑point and per‑common current limits.

3. How do I change the communication rate on the 1790D-0B16?
Use the two rotary switches on the module. One sets the node address; the other selects the baud rate (125, 250, or 500 kbps). Cycle power after any change.

4. Is the 37‑pin connector included with the 1790D-0B16?
Yes, the removable male D‑shell connector comes in the box. You only need to wire your field cables to it. No special crimping tool is required.

5. Can I mix the 1790D-0B16 with input modules on the same base?
Yes. The CompactBlock LDX system allows you to attach multiple expansion modules to one base. For example, you can combine the 1790D-0B16 with a 1790-T8BV8BX on the same network.