Allen-Bradley 1794-OF8IH Flex I/O Isolated Analog Output HART Module
$123.00
$320.00
Description
Allen-Bradley 1794-OF8IH Flex I/O Isolated Analog Output HART Module
Configured for isolated analog current output execution in the Flex I/O 1794 system, the Allen-Bradley 1794-OF8IH (1794-OF8IH Flex I/O Analog Output Module) provides direct physical/electrical execution for 0-20 mA and 4-20 mA output signals with HART communication capability.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-OF8IH |
| Brand | Allen-Bradley |
| Origin | United States |
| Product Type | Isolated Analog Output HART Module |
| Product Line | Flex I/O 1794 |
| Outputs | 8 isolated single-ended outputs |
| Output Signals | 0-20 mA, 4-20 mA |
| Resolution | 16-bit unipolar |
| Conversion Method | 16-bit digital-to-analog converter |
| Conversion Rate | 10 ms |
| Data Format | Engineering Units, Percent of Full Scale, RAW/Proportional Count |
| Terminal Base | 1794-TB3, 1794-TB3S |
| Calibration | Factory calibrated |
| FlexBus Current | 80 mA @ 5 VDC |
| Power Consumption | Maximum 5.0 W @ 24 VDC |
| Thermal Dissipation | Maximum 17.06 BTU/hr @ 24 VDC |
| Operating Temp | 32 to 131 deg F |
| Weight | 0.35 lbs |
| Mounting Type | DIN rail, open-style |
| Protection Rating | IP20 |
Profinet / EtherNet-IP Deterministic Control Integration
The 1794-OF8IH operates as an analog output component within the Allen-Bradley Flex I/O architecture. The module receives digital output commands through the FlexBus interface and converts engineering data into isolated current signals through its internal 16-bit digital-to-analog conversion circuitry. The module supports configurable 0-20 mA and 4-20 mA output ranges and provides HART pass-through message support for connected field devices.
The module configuration supports I/O density scaling within distributed Flex I/O installations where multiple analog channels are required. The 80 mA @ 5 VDC FlexBus current consumption and 5.0 W maximum power dissipation must be considered during system power budget calculations.
Frequently Asked Questions
Q: What output signal ranges are supported by the 1794-OF8IH?
A: The module supports configurable isolated analog current outputs of 0-20 mA and 4-20 mA with 16-bit unipolar resolution.
Q: Does the module provide HART communication support?
A: Yes. The 1794-OF8IH supports HART pass-through messaging for compatible field devices connected to its analog output channels.
Q: What terminal bases are compatible with this module?
A: The module is designed for installation with 1794-TB3 and 1794-TB3S terminal bases.
Field Installation Guidelines
Install the module on a compatible DIN rail assembly using the specified Flex I/O terminal base. Verify that the terminal base wiring arrangement matches the required analog output channel configuration before applying power.
Use shielded instrumentation wiring for analog current loops where required by the installation environment. Connect cable shields according to site grounding practices to minimize electrical noise coupling. Separate analog signal wiring from high-voltage power conductors and switching loads to reduce interference.
Confirm the FlexBus power capacity before adding multiple analog modules to the same adapter segment. Check field loop polarity, output channel assignment, and HART communication wiring before commissioning.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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