1791D-16V0 Allen‑Bradley 16 Input Module

Allen-Bradley 1791D-16V0 CompactBlock I/O Module

Product Introduction

The 1791D-16V0 belongs to the CompactBlock I/O 1791D series. It provides 16 sourcing inputs and requires no output bytes when used alone. This base module also includes an onboard DeviceNet adapter and a power supply. You can operate it independently or connect one expansion input or output module.

For example, with an expansion input block, the 1791D-16V0 produces 5 input bytes and consumes 0 output bytes. When paired with an expansion output module, it produces 3 input bytes and consumes 2 output bytes. This flexibility makes it suitable for many industrial control systems.

Additionally, the module measures just 0.81 lbs (0.37 kg). Its compact size fits narrow areas and shallow enclosures. Therefore, it works well where space is limited.

Technical Specifications

Here are the key technical details for the 1791D-16V0:

• Inputs per block: 16 sourcing inputs (highlighted)

• Input off‑state voltage: 5V DC max.

• Input on‑state voltage: 10V DC min.

• Input off‑state current: 1.5mA @ 5V DC max.

• Input on‑state current: 11mA @ 30V DC max.

• Outputs per block: 0

• DeviceNet power: 11-25V DC

• Enclosure rating: IEC IP20

The module produces 2 input bytes on its own. It consumes no output bytes by itself. Furthermore, it uses DeviceLogix Smart Component Technology for local control functions. This technology speeds up sense‑to‑actuation processes.

Mechanical & Environmental Data

The 1791D-16V0 comes with an IP20 enclosure. You must install it inside a subsidiary enclosure. It handles electrostatic discharge (ESD) risks, so follow proper handling guidelines to avoid internal damage.

Operating temperature ranges are standard for industrial environments. The detachable screw‑clamp terminal strip simplifies block replacement without rewiring. This feature saves time during maintenance.

Installation Guidelines

First, mount the 1791D-16V0 securely inside a control cabinet. Next, connect the DeviceNet network and supply 11-25V DC power. Then attach field wiring to the detachable terminal strip.

Meanwhile, ensure you do not exceed the maximum on‑state current of 11mA at 30V DC. Also, verify off‑state current stays below 1.5mA at 5V DC. Following these steps prevents abnormal operation.

Finally, add one expansion module if needed. The base module supports either an analog or digital Compact I/O expansion block. This setup increases input/output capacity without major redesign.

Packaging List

• 1791D-16V0 base input module (1 unit)

• Detachable screw‑clamp terminal strip

• Quick start guide (printed)

Note: No certificates or warranty documents are included. Contact your supplier for warranty terms.

Shipping method: FedEx, UPS, DHL

Frequently Asked Questions (FAQ)

1. Can I use the 1791D-16V0 with a SoftLogix controller?
Yes, it works perfectly with SoftLogix, PLC, and SLC programmable controllers.

2. What happens if I connect an expansion output module to the 1791D-16V0?
The module then produces 3 input bytes and consumes 2 output bytes.

3. Does the 1791D-16V0 require an external power supply?
No, it has a built‑in power supply. You only need to provide DeviceNet power at 11-25V DC.

4. How many expansion blocks can the 1791D-16V0 support?
It supports up to one analog or digital Compact I/O expansion block.

5. Is the terminal strip removable without tools?
Yes, it is a detachable screw‑clamp type. This allows quick block changes without rewiring.