1794-OE8H

Overview

1794-OE8H is an Allen-Bradley FLEX I/O analog output module with 8 single-ended channels, supporting HART communication and sigma-delta conversion for precise analog signal control.

Module Identity

• Model: 1794-OE8H

• Product Type: FLEX I/O Analog Output Module (HART-enabled)

• Manufacturer: Allen-Bradley Rockwell

• Number of Outputs: 8 single-ended, non-isolated

• Module Base: 1794-TB3G, 1794-TB3GS

Output Specifications

• Resolution: 13 bits

• Absolute Accuracy: 0.1% Full Scale @ 20 °C (68 °F)

• Accuracy Drift with Temperature: 0.010% Full Scale for 0…55 °C (32…131 °F)

• Functional Data Range:

• 15 V @ 22 mA
• 22 V @ 0 mA

• Data Format: Configurable

• Step Response: 4 ms to 99% of FS

• Conversion Type: Sigma-delta

Terminals & Connections

• Output Terminals: 0…2; 4…6; 8…10; 12…14; 17…19; 21…23; 25…27; 29…31

• Power Supply Terminals: 34/50 (+), 35/51 (-)

• Nominal Supply Voltage: 24 V DC (using 1794-PS13)

• Voltage Range: 19.2…31.2 V DC (includes 5% ripple)

Indicators

• Fault Indicators: 8 red LEDs

• HART Communication Indicators: 8 yellow LEDs

• Power Indicator: 1 green LED

Isolation & Safety

• Isolation Voltage: 50 V continuous, Basic Insulation Type

• Routine Test: 850 V DC for 1 s (field side to system)

• Channel Isolation: None (no isolation between individual channels)

Power & Environmental

• Power Dissipation (max): 6.1 W @ 31.2 V DC

• Enclosure Type Rating: None (open-style)

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