Allen Bradley 1734D-IA16 DeviceNet Input Block

The Allen-Bradley 1734D-IA16, also cataloged as the 1734D-IA16 Input Block, operates as a dedicated hardware component for direct 120 VAC digital signal acquisition within DeviceNet networks. The integrated block terminates 16 discrete input channels via screw terminals, converting field-level AC logic states into DeviceNet network registers without active onboard software processing layers.

Hardware Specifications

Industrial Control & Backplane Communication Properties

As an integrated distributed input node within Allen-Bradley control architectures, the 1734D-IA16 delivers direct network conversion and input conditioning:

• Profinet / EtherNet/IP Deterministic Networks: Maps 16 AC digital input states into standard DeviceNet I/O assemblies, transmitting data packets deterministically to central PLC processors across plant-wide fieldbus trunks.
• Backplane Bus Communication Velocity: Integrates the network adapter and I/O termination into a single hardware assembly, eliminating external backplane latency and speeding up digital state evaluation.
• I/O Density Scaling: Packs 16 discrete 120 VAC input circuits with screw terminal connections into a compact distributed housing, reducing cabinet footprint requirements for remote AC signal monitoring.

Frequently Asked Questions

Q: Does the 1734D-IA16 require a separate DeviceNet network adapter module for communication?

A: No, the 1734D-IA16 is a self-contained PointBlock unit that integrates the DeviceNet network interface and 16 input channels into a single physical block.

Q: What type of field wiring connections are supported by the 1734D-IA16?

A: The module features built-in screw terminals for direct conductor connection of up to 16 discrete 120 VAC input loops.

Field Installation Guidelines

Proper mechanical mounting and wiring practices ensure reliable 120 VAC signal detection and prevent electrical interference:

• Mechanical Installation and Mounting: Securely mount the 1734D-IA16 block onto a grounded 35 mm DIN rail or surface-mount panel. Ensure retention clips are engaged to withstand industrial vibration.
• 120 VAC Input Cabling: Connect 120 VAC field inputs to the designated screw terminals. Ensure neutral lines are appropriately tied to standard AC distribution blocks and maintain clean conductor terminations.
• DeviceNet Network Wiring and Shielding: Terminate the DeviceNet trunk/drop cable using standard color-coded wiring. Connect the network cable shield to functional earth ground at a single cabinet entry point to prevent electrical noise from disrupting fieldbus data packets.