The Omron E5EK-AA2-DRT, also cataloged as the E5EK-AA2 CompoBus/D-type Digital Controller, operates as a dedicated hardware component for closed-loop process control and process parameter digitizing within CompoBus/D (DeviceNet) fieldbus networks. Powered by a supply voltage of 100 to 240 VAC (or 24 VAC/DC), the unit executes process loop control routines across an allowable operating voltage range of 85% to 110%. The controller maintains low power consumption (15 VA max for AC models; 8 W for 24 VDC), transmitting digitized PV/SV dataset profiles to master PLCs.

Part Number Code Structure

• E5EK: Omron 1/8 DIN digital process controller product family.
• AA2: Advanced process control input/output structure specification.
• DRT: Integrated CompoBus/D (DeviceNet) fieldbus communication module prefix.

Technical Performance Metrics

Fieldbus Bus Communication & Dynamic Scaling

Connecting directly to DeviceNet trunklines, the controller exchanges cyclic I/O data with remote masters at fast backplane bus communication velocity. High I/O density scaling allows distributed temperature and process loops to transmit setpoints, alarm flags, and real-time process variables without overloading PLC main processing units. Solid-state internal memory preserves firmware flash compatibility during online node reconfiguration and power cycling.

Package & Delivery Contents

• 1 x Omron E5EK-AA2-DRT Digital Controller
• 1 x Panel Mounting Adapter Kit
• 1 x Operating Instruction Manual

Field Installation & Wiring Guidelines

• Panel Cutout Fastening: Insert the 1/8 DIN chassis into the panel cutout and secure with side mounting brackets to ensure tight environmental sealing.
• Power Supply Wiring: Connect AC line voltage (100 to 240 VAC) or 24 VAC/DC power to designated terminals, verifying operating voltage remains within 85% to 110%.
• CompoBus/D Communication Cable: Attach DeviceNet 5-wire shielded drop cable to trunkline connectors; ground shield wire at a single point.
• Sensor Input Isolation: Route thermocouple, RTD, or linear analog input cables away from AC motor drives and high-current power conduits.
• Ground Terminal Connection: Wire the earth protective terminal to the panel grounding bus using a short, low-impedance copper conductor.

Technical Knowledge Base

• Does the E5EK-AA2-DRT support hot-swapping on active DeviceNet fieldbus trunks?

  No. Disconnect power and bus communication connectors before replacing the unit to prevent signal corruption on active trunklines.

• How does the unit react when supply voltage drops below the 85% operating threshold?

  Under-voltage conditions trigger an internal reset mechanism, causing the unit to fail-safe into a hold state and halt control outputs.

• What precautions prevent noise interference on sensor input channels?

  Use shielded twisted-pair cables for analog signals and maintain dedicated conduit separation from high-voltage AC power wiring.

• How does CompoBus/D communication latency affect process loop execution?

  Internal PID loops operate independently of bus update rates, ensuring uninterrupted closed-loop control during network load peaks.

• Is external power required for the CompoBus/D network transceiver circuit?

  Yes. DeviceNet fieldbus communications require 24 VDC bus power supplied separately across the thick/thin trunkline cable.

• How is firmware consistency maintained across multi-node controller networks?

  The unit features non-volatile flash memory, maintaining parameters and firmware flash compatibility during total power outages.

• What mounting clearance is recommended for effective thermal dissipation?

  Maintain minimum 20 mm vertical clearance between adjacent DIN panel cutouts to allow natural convective heat dissipation.

• Can the controller be powered directly from a 24 VDC battery supply?

  Yes. The multi-voltage power supply module accepts nominal 24 VDC inputs within an operating range of 20.4 VDC to 26.4 VDC.