The Omron NX-TC3405, also cataloged as the NX-TC3405 Temperature Control Unit, operates as a dedicated hardware component for multi-loop thermal signal acquisition and PWM actuation within NX I/O Bus automation architectures.

Functional Configuration & Unit Architecture

The specific model nomenclature identifies input signal channel allocations and output stage drive parameters within the Omron NX modular product line.

• NX: Modular I/O bus expansion platform for EtherCAT and EtherNet/IP bus couplers.
• TC: Temperature control module classification incorporating autonomous closed-loop control algorithms.
• 3405: Four-loop temperature control configuration with universal thermocouple/RTD inputs and 4 PNP digital outputs.

Technical & Mechanical Data

Deterministic Routing & Firmware Execution

The module interfaces directly with the central backplane bus to ensure consistent backplane bus communication velocity across deterministic networks like EtherCAT. Integrated firmware flash compatibility supports seamless field updates without disrupting loop configuration constants. High-density system integration enables flexible I/O density scaling while maintaining synchronized multi-loop heating and cooling profile execution.

Package Component List

• 1 x Omron NX-TC3405 Temperature Control Unit
• 2 x Detachable Push-in Plus terminal block connectors
• 1 x Installation instruction datasheet

Physical Mounting & Wiring Standards

• DIN Rail Attachment
  • Mount the unit vertically onto a standard 35 mm DIN rail inside an IP20 or higher enclosure to maintain natural convection cooling.
• Terminal Block Connection
  • Insert solid or ferruled conductors directly into the Push-in Plus terminals without requiring screw-tightening tools.
• Signal Wire Separation
  • Route thermocouple and RTD compensation leads in separate raceways away from high-voltage motor power cables.
• Current Transformer Cabling
  • Wire heater burnout alarm current transformer inputs directly to designated terminal pins for inline current evaluation.

Engineering FAQ & Physical Limitations

• What input sensor types can be connected to the analog channels?

  The unit supports B, C, E, J, JPt100, K, L, N, P, Pt100, R, S, T, and U temperature sensors.

• What is the maximum output current capacity per digital channel?

  Each PNP digital output supplies up to 21 mA at 24 VDC for direct solid-state relay driving.

• What is the internal signal conversion cycle time for all loops?

  Analog conversion and control calculation execute at a fixed rate of 50 ms per unit.

• Does the hardware feature embedded heater burnout detection capabilities?

  Yes, the module incorporates dedicated inputs for heater burnout alarm detection across active loops.

• What degree of physical protection does the outer housing provide?

  The plastic housing complies with an IP20 ingress protection rating for cabinet installations.

• How are input circuits isolated from internal logic and adjacent lines?

  All four analog input channels feature galvanically isolated signal conditioning circuitry.

• What control modes can be configured on the individual channels?

  Each loop can be independently assigned to execute standard Heating or Cooling control algorithms.

• What type of physical connectors are used for field wiring?

  The front panel houses two detachable Push-in Plus terminal blocks for direct wire insertion.