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OVERVIEW
Official designation: Allen-Bradley 1791D-8V8P (CompactBlock I/O, Combination Base Module)
Role/Application: A CompactBlock DeviceNet base module providing a combination of 8 sourcing inputs and 8 sinking outputs, with an integrated adapter and power supply.
KEY SPECS SUMMARY
Power: 24V DC nominal, 10-30V DC range
Interfaces / Ports: 8 sourcing inputs, 8 sinking outputs
Indicators: Two rotary node address switches
Operating Temp: 0 to 60 degrees C
Platform / Compatibility: DeviceNet, SLC, PLC, SoftLogix
Limit: Output current is 0.5A max per point
Lifecycle: Discontinued by manufacturer
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the maximum off-state leakage current for the 8 sourcing input channels?
A: The maximum off-state input current is 1.5 mA across the operating voltage range.
Wiring & Installation:
Q: How is the DeviceNet node address set on the 1791D-8V8P base module?
A: Node address is set using the two rotary switches located behind a door on the top of the module.
Troubleshooting & Compatibility:
Q: What happens if the DeviceNet node address switches are set to a value between 64 and 99?
A: A switch setting of 64 through 99 causes the module to use the last internally stored valid node address.
Replacement & Upgrades:
Q: Can the 1791D-8V8P combination base module be expanded with additional I/O blocks?
A: Yes, it supports coupling with a 16-point expansion module, achieving a total of up to 32 I/O points.
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| After-sales Service Contact or Customer Support Number | See this page for details |
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