Configured for multi-range field analog acquisition in DeviceNet fieldbus architectures, the Omron DRT1-AD04 (DRT1-AD04 Analog Input Module) provides direct physical/electrical execution. It converts up to 4 voltage or current input channels into digital values and transmits digitized process variables over DeviceNet network trunks.

Designation Matrix & Model Structure

• DRT1: Smart slave terminal family code for DeviceNet network interfaces.
• AD: Analog-to-digital converter input functional block.
• 04: 4-point analog input channel capacity.

Electrical & Mechanical Specifications

Deterministic Network Operations & Bus Velocity

The DRT1-AD04 processes analog inputs at speeds up to 2 ms per point, providing responsive I/O density scaling across distributed network segments. Internal logic processing coordinates background communications with master PLC CPU modules without causing bus communication velocity bottlenecks. Built-in firmware flash compatibility supports deterministic DeviceNet explicit and I/O messaging modes across remote racks.

Standard Shipping Package

• 1 x Omron DRT1-AD04 Analog Input Module Unit
• 1 x DeviceNet 5-Pin Open Plug Connector
• 1 x Terminal Label Sheet

Hardware Mounting & Field Wiring Directives

Enclosure & Rail Mounting

• Snap the module securely onto a standard 35-mm DIN track or attach it to a flat panel via two M4 screws.
• Ensure a clearance of at least 30 mm above and below the module to allow sufficient thermal heat dissipation.

Signal & Bus Cable Termination

• Connect field analog lines using shielded twisted-pair cables, grounding the shield wire at a single enclosure point.
• Wire the DeviceNet communications cable to the 5-pin open terminal block observing standard color-coded signal/power pinouts.

Frequently Asked Questions

• What signal input ranges are supported by the DRT1-AD04 module?

  The module supports voltage ranges of 0 to 5 V, 1 to 5 V, 0 to 10 V, and -10 to 10 V, as well as current ranges of 0 to 20 mA and 4 to 20 mA.

• What conversion speed does the analog-to-digital converter achieve?

  The conversion time is 2 ms per active point, resulting in 8 ms for 4 points or 4 ms for 2 points.

• How is the module powered for field communication and internal logic?

  Communications run on 11 to 25 VDC from the DeviceNet bus, while internal logic uses a 20.4 to 26.4 VDC external supply.

• What digital resolution does the DRT1-AD04 provide across its input scale?

  The unit provides a conversion resolution of 1/6,000 across the full selected input range.

• What input impedance is presented to voltage and current field sensors?

  Voltage inputs feature an input impedance of 1 MOhm minimum, while current inputs present approximately 250 Ohms.

• What mounting options are available for panel installation?

  The module supports direct surface mounting using M4 screws or snap-on mounting on a standard 35-mm DIN rail.

• What is the maximum signal input voltage and current the unit can tolerate without damage?

  Maximum signal limits are +/-15 V for voltage inputs and +/-30 mA for current inputs.

• What insulation resistance exists between isolated internal circuits?

  The module provides an insulation resistance of at least 20 MOhms measured at 250 VDC between isolated circuit blocks.