Product Details
Technical Overview
The 1794-APB (Part Number 1794-APB) serves as a high-performance communication gateway for the Flex I/O platform, enabling seamless integration into Profibus DP networks. This adapter functions as a remote node, facilitating high-speed data exchange between a Profibus master controller and up to eight Flex I/O modules. By utilizing the 1794-APB (1794-APB), engineers can implement distributed I/O architectures that reduce field wiring costs while maintaining high signal integrity over long distances.
Designed for industrial reliability, the module supports transmission speeds of up to 12 Mbps and features a standard 9-pin D-shell interface for secure network connectivity. The 1794-APB (Part Number 1794-APB) manages the power distribution to the backplane (Flexbus) and provides essential diagnostic feedback through dedicated status indicators, ensuring localized monitoring of both network health and module operation.
Technical Specifications
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Network Protocol Profibus DP
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Maximum I/O Capacity Supports up to 8 Flex I/O modules
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Data Transmission Rate Auto-baud sensing up to 12.0 Mbps
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Network Connector Single 9-pin D-shell (RS-485)
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Nominal Input Voltage 24V DC
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Operational Voltage Range 19.2V DC to 31.2V DC (including 5% ripple)
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Flexbus Output Current 640mA maximum at 5V DC
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Input Current Consumption 400mA maximum at 24V DC
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Power Dissipation 7.68W maximum at 19.2V DC
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Thermal Dissipation 26 BTU/hr maximum at 19.2V DC
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Isolation Voltage 850V DC for 1 second (Input to Flexbus)
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Mounting Options DIN Rail or Panel Mount (Panel requires 1794-NM1 kit)
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Status Indicators Red/Green LEDs for Module Status and Profibus Link
Operational Applications
The 1794-APB (1794-APB) is optimized for heterogeneous automation environments where Allen Bradley I/O must interface with non-Rockwell controllers
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Distributed control in process industries utilizing Siemens or other Profibus-compliant PLCs.
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Machine-level I/O expansion in automotive assembly lines requiring high-speed deterministic communication.
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Remote monitoring stations where the robust noise immunity of Profibus DP is required over long cable runs.
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Retrofitting legacy systems to bridge modern Flex I/O hardware with existing serial network infrastructures.
Technical FAQ
Does this adapter support the Profibus DP-V1 acyclic messaging?The 1794-APB (Part Number 1794-APB) primarily supports DP-V0 cyclic data exchange for high-speed I/O updates. For advanced acyclic parameters, verify the GSD file configuration within your network master.
How is the node address configured for this module?The Profibus station address is set via hardware switches located on the side or top of the module, supporting addresses from 00 to 126.
Is external power required for the connected I/O modules?While the 1794-APB (1794-APB) provides logic power to the Flexbus, separate 24V DC field power must be wired to the terminal bases for individual I/O module operation.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.