Allen-Bradley 1790-16BV0X 16 Universal Input Module

Allen-Bradley 1790-16BV0X 24V DC 16 Universal Input Module

Product Introduction

The 1790-16BV0X module belongs to the CompactBlock LDX series. It offers 16 universal input points for distributed I/O systems. Unlike fixed-type modules, this unit accepts both sinking and sourcing field devices. You can connect either type without changing wiring schemes. Each channel operates at 24V dc nominal with a typical on-state current of 8 mA. Therefore, the 1790-16BV0X simplifies inventory and reduces wiring errors.

Technical Specifications

Universal Input Characteristics

The 1790-16BV0X delivers 16 input points that work with sinking or sourcing field devices. The on-state voltage ranges from 9.6V dc minimum to 28.8V dc maximum, with 24V dc nominal. The off-state voltage stays below 5.0V dc max. On-state current reaches 8 mA max per channel at 28.8V dc. Input impedance is nominally 4.8 KΩ.

Sixteen green status indicators show the input states clearly. The common type uses 8 points per 8 COM with non-polarity design. This non-polarity feature means you do not worry about positive or negative wiring. Simply connect your field device across the input and its associated common.

General Electrical Data

DeviceNet power for the base block requires 24V dc nominal. Its voltage range extends from 11V dc to 28.8V dc. Power dissipation for the base block reaches 1.2W max at 28.8V dc. Isolation between I/O and logic uses photocoupler technology rated at 1250V ac rms. Note that DeviceNet to logic and DeviceNet power are nonisolated. For wiring, the module employs a 37-pin D-shell connector.

Produced Data and Bit Mapping

The 1790-16BV0X produces three words of data to the master device.

Produce Word 0 (Bits 00-07) - Status Byte
This byte provides module health information. Monitor this byte for diagnostic purposes.

Produce Word 1 (Bits 08-15) - Input Bits I0 to I7
When a bit is set (1), the corresponding input is active.

• Bit 08 corresponds to input I0

• Bit 09 corresponds to input I1

• Bit 10 corresponds to input I2

• Bit 11 corresponds to input I3

• Bits 12-15 correspond to inputs I4 through I7

Produce Word 2 (Bits 16-23) - Input Bits I8 to I15
When a bit is set (1), the corresponding input is active.

• Bit 16 corresponds to input I8

• Bit 17 corresponds to input I9

• Bit 18 corresponds to input I10

• Bit 19 corresponds to input I11

• Bits 20-23 correspond to inputs I12 through I15

Mechanical and Environmental Parameters

The 1790-16BV0X carries an IP20 protection rating. It is designed for use inside control cabinets. Operating temperature typically ranges from 0°C to 55°C. Storage temperature spans -25°C to 85°C. Relative humidity should stay between 5% and 95% non-condensing. Vibration resistance meets IEC 60068-2-6 standards. Shock resistance complies with IEC 60068-2-27.

Installation Guide

First, disconnect all power before wiring the 1790-16BV0X. Next, mount the module onto a DIN rail or directly to a panel. Then, connect the 37-pin D-shell cable to the module. After that, wire your field devices to the appropriate input channels.

For a sinking field device (NPN output), connect the device output to the input terminal. Then connect the device common to +24V dc. For a sourcing field device (PNP output), connect the device output to the input terminal. Then connect the device common to GND. The non-polarity common accepts either arrangement.

Furthermore, verify that input voltages stay between 9.6V and 28.8V dc. Use copper conductors with a wire gauge of 0.5 to 1.5 mm². Tighten all screws to the torque specified in the manual. Once wiring completes, apply power and observe the green status LEDs. Each LED turns on when its corresponding input receives a valid on-state voltage.

Packaging List

• 1790-16BV0X module (1 unit)

• 37-pin D-shell connector (1 piece, pre-attached)

• Installation instructions sheet

• DIN rail mounting clips (2 pieces)

Note: No certificates or warranty documents are included.

Shipping

We ship all orders via FedEx, UPS, or DHL. Delivery typically takes 3-7 business days worldwide.

Frequently Asked Questions (FAQ)

1. What does "universal input" mean on the 1790-16BV0X?
It means the module accepts both sinking (NPN) and sourcing (PNP) field devices. You do not need different modules for different device types.

2. Can I mix sinking and sourcing devices on the same 1790-16BV0X?
Yes. Each of the 16 channels works independently. Some channels can connect to sinking sensors while others connect to sourcing sensors.

3. Why does my input status LED stay on even with no device connected?
Check for a short circuit or wiring mistake. Also verify that the off-state voltage from your sensor stays below 5.0V dc max. Some sensors have leakage current that keeps the input active.

4. How do I read the input status from the 1790-16BV0X in my PLC?
Read Produce Word 1 for inputs I0 to I7. Read Produce Word 2 for inputs I8 to I15. Each bit represents one input channel.

5. Is the 1790-16BV0X compatible with both 1790 base and expansion configurations?
Yes. This module works as either a base block or an expansion block within the same 1790 CompactBlock LDX system.