What is the nominal output voltage of the 1794-OA8I?
120 VAC across eight isolated output channels.
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Allen-Bradley
1794-OA8I
Flex I/O digital output module, 8 isolated outputs, 120 VAC, 4 A
Allen-Bradley
From $212.44In stock
Product Description
The 1794-OA8I is an Allen‑Bradley Flex I/O discrete output module designed for AC switching applications requiring isolated channels. It provides eight individually isolated outputs with a nominal 120 VAC output voltage and supports up to 4 A output current per module. The module is open‑style for DIN rail mounting and carries an IP20 rating, making it suitable for protected industrial panels. Electrical performance includes a maximum on‑state voltage drop of 1.0 V at 0.5 A, minimum on‑state current of 5 mA per output, and a maximum off‑state leakage of 2.25 mA. Typical power dissipation is 4.1 W at 0.5 A with corresponding thermal dissipation of 14 BTU/hr, and FlexBus current draw is 80 mA at 5 VDC. It is intended for use within the Flex I/O 1794 platform, integrating with distributed control systems where channel isolation and AC load control are required. The module supports continuous isolation at 120 V and is supplied without terminal bases or accessories, which are ordered separately.
Key Features
- •Eight isolated AC output channels
- •Nominal 120 VAC output voltage
- •4 A output current rating per module
- •Low 1.0 V drop at 0.5 A
- •FlexBus draw 80 mA at 5 VDC
- •Power dissipation 4.1 W max
- •DIN rail mount, IP20 open style
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: $348
Availability: 19 in stock
Lead time: ~2 day lead
Never Used
Price: $303
Availability: 2 in stock
Lead time: ~2 day lead
Used
Price: $212.44
Availability: 49 in stock
Lead time: ~2 day lead
Specifications
- Model number
- 1794-OA8I
- Output type
- Discrete AC outputs
- Number of outputs
- 8 isolated
- Nominal output voltage
- 120 VAC
- Output current rating
- 4.0 A
- On-state current (min)
- 5 mA per output
- On-state voltage drop (max)
- 1.0 V at 0.5 A
- Off-state leakage (max)
- 2.25 mA
- Isolation voltage
- 120 V continuous
- FlexBus current
- 80 mA at 5 VDC
- Power dissipation
- 4.1 W at 0.5 A max
- Thermal dissipation
- 14 BTU/hr at 0.5 A max
- Mounting
- DIN rail
- Enclosure rating
- IP20 open style
- UPC
- 612598179954
- Weight
- 0.25 lb (0.11 kg)
- Part #
- 1794-OA8I
- Category
- PLCs/Machine Control
- Subcategory
- VDC Logic I/O Module
- Weight
- 0.25 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
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Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
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FAQ
How much FlexBus current does the module draw?
80 mA at 5 VDC from the Flex I/O backplane.
What is the maximum off-state leakage current?
Up to 2.25 mA per output.
Does it include the terminal base?
No, terminal bases and accessories are ordered separately.
What is the enclosure rating and mounting style?
IP20 open style, DIN rail mount.