Configured for high-speed differential voltage measurement in Sysmac automation platforms, the Omron NX-AD3608 (NX-AD3608 Analog Input Unit) provides direct physical/electrical execution.

Ordering Code & Nomenclature Matrix

The model number NX-AD3608 follows the standard Omron NX Series module categorization schema:

• NX: Identifies the modular I/O product line for Sysmac controllers and EtherCAT couplers.
• AD: Analog Input unit classification.
• 3: 4-point input capacity.
• 6: Input voltage range configured for -10 to +10 V.
• 08: High-resolution performance variant (1/30000 resolution, 10 us/point conversion speed).

Technical Performance Specifications

High-Speed Deterministic Network Performance

The NX-AD3608 integrates directly into high-density industrial control topologies utilizing EtherCAT deterministic networks. Internal signal processing maintains a conversion cycle speed of 10 us per point, allowing synchronized I/O refreshing aligned with the master controller task cycle. High-speed backplane bus communication velocity enables jitter-free data transfer to the CPU, while firmware flash compatibility maintains consistent parameter configuration across Sysmac Studio software revisions.

Package Contents & Ordering Information

• 1 x Omron NX-AD3608 Analog Input Unit
• 1 x Terminal block unit (12-pin screwless clamp type, pre-installed)
• 1 x Instruction sheet

System Integration & Wiring Directives

• Mounting Position: Secure the module onto a standard 35 mm DIN rail by snapping the rear locking mechanism into position until an audible click is heard.
• Wiring Method: Insert solid wires or stranded wires with insulated copper ferrules directly into the 12-terminal screwless clamping block. Use a flat-blade screwdriver to depress the release button when removing conductors.
• Shielding & Grounding: Connect shielded differential input cables to prevent electromagnetic interference from surrounding drive equipment. Maintain single-point shield grounding at the panel side.
• Power Isolation: The module operates without consuming I/O power supply current, but requires proper functional grounding on the connected CPU or Coupler unit DIN rail clip.

Technical FAQs

• What is the maximum absolute input voltage limit for the NX-AD3608?

  The module tolerates a continuous maximum voltage of +/-15 V across its differential input terminals without causing internal hardware damage.

• Does the NX-AD3608 provide channel-to-channel isolation between inputs?

  No, isolation is provided between the input circuits and the internal NX bus, but there is no electrical isolation between individual input channels.

• What I/O refreshing modes are supported by this unit?

  The unit supports both synchronous I/O refreshing (synchronized with the master execution cycle) and Free-Run refreshing modes depending on system requirements.

• How are field wires terminated on the front interface?

  Field connections utilize a removable 12-pin screwless push-in clamping terminal block that accepts solid wires or ferruled stranded conductors.

• What is the overall measurement accuracy across the full operational temperature range?

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

• Does this module draw power from the connected I/O power supply bus?

  No, the NX-AD3608 features no I/O power supply terminals and draws power exclusively from the internal NX bus (1.45 W max on CPU units).

• What is the input conversion speed per analog channel?

  The internal analog-to-digital converter processes signals at a speed of 10 us per point with a total internal resolution of 1/30000.

• What type of isolation is used between the inputs and the NX bus?

  Power is isolated via transformer coupling, while signal lines are isolated using high-speed digital isolator components.