The Omron NX-AD2608, also cataloged as the NX-AD2 Analog Input Unit, operates as a dedicated hardware component for high-speed differential voltage signal acquisition within NX Series bus systems.

Model Nomenclature & Option Designation

• NX: Architecture platform for modular bus I/O systems.
• AD: Functional designation for Analog Input conversion.
• 2: Circuit point density representing 2 input channels.
• 6: Voltage measurement signal range configured for -10 to +10 V.
• 08: Hardware specification variant defining 1/30000 resolution and 10 us/point conversion velocity.

Operating Parameters & Technical Data

Deterministic Network Bus Sync

The module operates across deterministic networks with synchronous I/O refreshing and Free-Run refreshing modes. Backplane bus communication velocity handles high-bandwidth data transfers, maintaining high I/O density scaling efficiency and firmware flash compatibility across standard NX bus couplers.

Standard Package Deliverables

• 1 x Omron NX-AD2608 Voltage Analog Input Module
• 1 x 8-Pin Screwless Clamping Terminal Block

Field Wiring & Shielding Rules

Terminal Connection Assembly

Push stripped wire ends or ferrule crimps directly into the 8-point screwless clamping terminal block. Ensure full seating inside the spring clamp without exposed conductor strands.

Shielding & Grounding Setup

Route analog signal cables separately from high-voltage motor wires. Connect cable shielding directly to designated functional ground points to prevent electromagnetic interference from distorting high-resolution measurements.

Differential Input Isolation

Connect external voltage source leads across differential signal terminals. Note that while input circuits are galvanically isolated from the internal NX bus, no channel-to-channel isolation exists between individual inputs.

Technical Questions & Answers

• What is the conversion speed and resolution of the NX-AD2608?

  The module provides a conversion speed of 10 us/point combined with a overall internal resolution rating of 1/30000.

• How are the input channels electrically isolated from the backplane?

  Isolation between input circuits and the NX bus uses power transformers and digital isolators, though inputs share a common ground without channel-to-channel isolation.

• What power consumption draw does the module require from the bus?

  Power draw is rated at 1.35 W maximum when connected to a CPU Unit, or 1.05 W maximum when attached to a Communications Coupler Unit.

• What voltage limits can the input terminals tolerate without hardware failure?

  The module features an absolute maximum input voltage rating of +/-15 V across its differential input terminals.

• Which I/O refreshing methods are supported by this hardware?

  The module supports switching between synchronous I/O refreshing and Free-Run refreshing modes depending on controller configuration.

• What is the overall measurement accuracy across the operating thermal range?

  Overall accuracy is rated at +/-0.1% of full scale at 25 deg C, and +/-0.2% of full scale across the full 0 to 55 deg C operating range.

• Does the module draw electrical current from the external I/O power supply?

  No, the unit operates without external I/O power supply terminals and draws zero current from the I/O power line.

• What type of wiring connection interface is provided on the module face?

  Field wiring connects through a removable 8-terminal screwless clamping terminal block using direct push-in technology.