Allen-Bradley 1794-OE4 Flex I/O Analog Output Module

Description

The 1794-OE4 Flex I/O Analog Output Module from Allen-Bradley (Rockwell Automation) provides four single-ended outputs with 12-bit resolution, supporting both voltage and current output types. It operates with 4-20mA output current and +/- 10VDC output voltage terminals, offering flexibility in industrial applications requiring precise analog output control. The module uses pulse-width modulation (PWM) for conversion and supports a left-justified, 16-bit 2’s complement data format for output.

Revisions

• 1794-OE4 Ser A: 1794-OE4/A, Series A, Rev A
• 1794-OE4 Ser B: 1794-OE4/B, Series B, Rev B

Technical Specifications

• Manufacturer: Rockwell Automation
• Brand: Allen-Bradley
• Product Type: Flex I/O Output Analog Module
• Product Description: High-density analog output module with 4 single-ended outputs.
• Conversion Type: Pulse Width Modulation (PWM)
• Data Format: Left-Justified, 16-bit 2’s complement
• Resolution: 12 bits (+/- sign)
  • Voltage: 2.56 mV per count
  • Current: 5.13 µA per count
• Number of Outputs: 4 Single-ended outputs
• Output Types:
  • 0 to 20 mA
  • 4 to 20 mA
  • +/- 10 VDC
  • 0 to 10 VDC
• Conversion Rate: 1.024 ms maximum (all channels)
• Power Dissipation: 4.5 W at 31.2 V DC maximum
• Thermal Dissipation: 13.6 BTU/hour at 31.2 V DC maximum
• Current Load on Voltage Output: 3 mA maximum
• Flexbus Current: 20 mA

Indicators

• 1 green/red power/status indicator

Supply and Mounting

• External DC Supply Nominal: 24V DC
• External DC Supply Range: 10.0 – 31.2V DC (including 5% AC ripple)
• Mounting: DIN Rail
• Wire Size: Determined by the installed terminal base
• Terminal Base Compatibility:
  • 1794-TB2
  • 1794-TB3
  • 1794-TB3S
  • 1794-TB3T
  • 1794-TB3TS
  • 1794-TBN

Environmental Specifications

• Operating Temperature: 0 to 55 °C (32 to 131 °F)
• Storage Temperature: -40 to 85 °C (-40 to 185 °F)
• Vibration: 5g @ 10 to 500 Hz

Part Information

• Part Number/Catalog No.: 1794-OE4
• UPC: 10612598137876
• UNSPSC Code: 32151602

Additional Notes

• External DC power supply is required for operation (nominal 24V DC).
• The module is designed for flexible applications, suitable for use in industrial systems that require high-density analog output with a range of current and voltage signal options.

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