Allen Bradley 1790-0V16X CompactBlock LDX I/O Expansion Block
Allen Bradley 1790-0V16X CompactBlock LDX I/O Expansion Block
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Brand:Allen Bradley PLC Item No.:1790-0V16X Product Origin:USA Product Dimensions:104 x 42 x 52 mm Product Weight:0.1 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen Bradley 1790-0V16X CompactBlock LDX I/O Expansion Block is a distributed digital output module designed for industrial control applications requiring additional 24 V DC output points. It provides 16 sinking outputs and connects to the field wiring through a 37-pin D-shell interface.
Each output supports a maximum current of 0.5 A, while the maximum current per common is 4.0 A. The module also features individual green status indicators and photocoupler isolation between its I/O and logic circuits. These features help simplify output monitoring and support reliable operation in compatible automation installations.
As part of the CompactBlock LDX product family, the 1790-0V16X is suitable for DeviceNet-based distributed I/O systems, machine automation, and industrial equipment maintenance. Its compact construction makes it practical for applications where additional digital output capacity is needed without significantly increasing installation space.
For replacement projects, engineers should verify the sinking output configuration and field wiring requirements carefully. This is particularly important when replacing a sourcing-output model, because the two output types use different wiring arrangements.
Technical Specifications
Parameter
Specification
Brand
Allen Bradley
Model
1790-0V16X
Product Series
CompactBlock LDX
Product Type
I/O Expansion Block
I/O Function
Digital Output
Communication Network
DeviceNet
Number of Outputs
16
Output Configuration
Sinking
Output Isolation
Non-Isolated
Nominal Voltage
24 V DC
On-State Voltage Range
10–28.8 V DC
Maximum Output Current
0.5 A per channel
Maximum Current per Common
4.0 A
Maximum On-State Voltage Drop
0.5 V DC
Maximum Off-State Leakage
0.5 mA
Output Signal Delay
0.5 ms OFF-to-ON / 1.0 ms ON-to-OFF
Status Indicators
16 Green LEDs
Isolation Method
Photocoupler
Isolation Voltage
1250 V AC RMS
Connector
37-Pin D-Shell
Dimensions
104 × 42 × 52 mm
Weight
0.1 kg / 0.22 lb
Recommended Related Models
The following Allen Bradley models are relevant to CompactBlock LDX digital I/O applications:
1790-T8BV8VX – Allen Bradley CompactBlock LDX Mixed Digital I/O Expansion Block.
1790-T8BV8BX – Allen Bradley CompactBlock LDX Mixed Digital I/O Expansion Block.
When purchasing the 1790-0V16X, confirm the complete model number, output configuration, connector type, and compatibility with the existing DeviceNet installation.
Applications
The Allen Bradley 1790-0V16X CompactBlock LDX I/O Expansion Block is a 16-point digital output module designed to expand the output capacity of compatible DeviceNet-based industrial automation systems. It features 24 V DC sinking outputs and a 37-pin D-shell connector, providing a compact solution for controlling multiple field devices.
Typical applications include:
Manufacturing Automation: Controls compatible DC loads in automated production equipment.
Conveyor Systems: Provides digital output signals for industrial material-handling equipment.
Packaging Machinery: Supports switching operations for machine actuators and auxiliary devices.
Industrial Control Panels: Adds output points to existing distributed I/O configurations.
Process Automation: Supports discrete control functions in DeviceNet-based installations.
Machine Upgrades: Expands the available output capacity of compatible CompactBlock LDX systems.
Key Features and Advantages
1. 16-Point Digital Output Capacity
The module provides 16 non-isolated sinking output channels, allowing multiple field devices to be controlled through one compact expansion block.
2. 24 V DC Operating Voltage
Designed for 24 V DC industrial control circuits, it supports common automation applications requiring low-voltage digital switching.
3. Sinking Output Configuration
The sinking output design provides a current path toward the DC common when an output is activated. Correct field power wiring and load polarity are essential.
4. Individual Output Status Indicators
Sixteen green LED indicators provide visual channel-status information, helping technicians monitor output operation.
5. Photocoupler Isolation
Photocoupler isolation between the I/O circuitry and logic circuitry helps separate field-side electrical signals from internal module electronics.
6. Compact D-Shell Interface
The 37-pin D-shell connector provides an organized interface for field wiring and supports integration into compatible CompactBlock LDX installations.
7. Flexible System Expansion
The module adds digital output capacity to compatible DeviceNet I/O assemblies, making it useful for maintaining and expanding existing automation systems.
Technical FAQs
Q1: How many output channels does the 1790-0V16X provide?
It provides 16 non-isolated digital output points, configured as sinking outputs.
Q2: What is the nominal operating voltage?
The nominal output voltage is 24 V DC. The specified on-state voltage range is 10–28.8 V DC.
Q3: What is the maximum output current per channel?
The maximum output current is 0.5 A per channel, with a maximum of 4.0 A per common.
Q4: What is the difference between sinking and sourcing outputs?
A sinking output provides a path toward the DC negative or ground reference when activated. A sourcing output supplies positive voltage to the connected load. The 1790-0V16X uses sinking outputs.
Q5: What connector does this module use?
It uses a 37-pin D-shell connector for field I/O connections.
Q6: Does the module have channel-status indicators?
Yes. It includes 16 green LED indicators, allowing technicians to visually check individual output status.
Q7: What is the maximum output signal delay?
The maximum delay is 0.5 ms from OFF to ON and 1.0 ms from ON to OFF.
Q8: What isolation protection is provided?
The module uses photocoupler isolation between the I/O and logic circuits, with a specified isolation voltage of 1250 V AC RMS.
Q9: Can the 1790-0V16X operate independently?
It is an expansion block intended for use in a compatible CompactBlock LDX configuration. It should not be treated as a standalone PLC or independent controller.
Q10: What should be checked before replacing this module?
Check the DeviceNet system configuration, output type, field voltage, maximum load current, common wiring, connector arrangement, and compatibility with the installed base block.
