1794-OM8 Allen Bradley Output Module
Specification
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Product Description
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The 1794-OM8 by Allen-Bradley is a Flex I/O digital output module designed for distributed industrial control systems. It belongs to the 1794 Flex I/O series, enabling modular, scalable, and field-mounted I/O architectures for PLC and DCS applications.The 1794-OM8 is a compact, 8-point AC digital output module designed for distributed Flex I/O systems, delivering reliable high-voltage switching control in industrial automation environments.
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| More Technical Data |
| Number of Output Channels: |
8 (non-isolated)
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| Nominal Output Voltage: |
240 V AC
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| Total Module Current: |
Up to 4.0 A (aggregate across all channels)
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| Frequently Asked Questions |
1. What is the fundamental operational function of the 1794-OM8 within a Flex I/O distributed control architecture?
The 1794-OM8 operates as an 8-channel AC digital output module, serving as a field-level actuation interface that converts controller-issued logic commands into high-voltage AC switching signals for industrial loads. It is an integral component of the modular Flex I/O ecosystem.
2. How does the 1794-OM8 manage high-voltage AC load switching while maintaining system-level reliability?
The 1794-OM8 utilizes solid-state (triac-based) switching elements, enabling controlled conduction of AC loads within a nominal range of approximately 159–264 V AC while maintaining predictable on-state and off-state electrical behavior.
3. What electrical load capacity constraints define the operational envelope of the 1794-OM8?
The 1794-OM8 supports a maximum output current of 0.5 A per channel and an aggregate capacity of approximately 4 A per module, making it suitable for medium-duty industrial actuators such as contactors and solenoids.
4. Why does the 1794-OM8 employ a non-isolated channel architecture, and what implications does this have?
The 1794-OM8 adopts a non-isolated output configuration to optimize compactness and cost efficiency. However, this implies that all channels share a common reference, necessitating careful system design to avoid cross-channel interference or unintended load interactions.
5. How does the 1794-OM8 integrate with terminal base units and backplane communication infrastructure?
The 1794-OM8 does not directly interface with field wiring; instead, it plugs into dedicated terminal base units (e.g., 1794-TBN, TBNF, TBNK, TBNFK), which provide wiring terminals and backplane connectivity for power and communication distribution.
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We specialize in control systems and drives. With many years of experience in the industrial sector,
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