The Allen-Bradley 1794-OA16 Flex I/O module delivers reliable control for AC loads. You need a module that energizes solenoids, contactors, and pilot lamps efficiently. This module provides sixteen non-isolated output channels. Each channel operates within a 74 to 132VAC range.
Product Procurement & Buyer Guide
Procurement teams face challenges matching modules to exact application needs. The 1794-OA16 simplifies this with clear specifications for industrial environments. This module controls AC loads like relays and horns. It uses a nominal 120VAC power supply.
The module handles an output current rating of 4.0 Amps maximum. Each output channel supports 5 mA minimum and 500 mA maximum at 55°C. You will find it perfect for pilot duty with a 5A inrush rating. This ensures reliable switching for demanding inductive loads.
You must pair this module with a compatible terminal base for operation. It works with bases like the 1794-TBN and the 1794-TB3. Using the correct base ensures proper wiring and signal termination. Check your system for a suitable 1794-series base unit.
The channels are non-isolated with a continuous isolation voltage of 120 Volts. This design simplifies wiring for common AC voltage sources. The module draws 80 mA from the FlexBus at 5 Volts DC. This low draw makes it easy on your backplane power supply.
The open-type enclosure allows for installation in controlled environments. It operates reliably from 32°F to 131°F (0°C to 55°C). The module withstands 5g vibration at 10 to 500 Hz. It also handles 30g of operating shock without failure.
The on-state voltage drop stays below 1.5 Volts AC at 0.5 Amps. Off-state leakage current is a maximum of 2.25 mA. You get a maximum output signal delay of ½ cycle for switching. The module includes an internal 2.5A, 150VAC fuse for protection.
Deep-Dive Technical FAQ
Q1: What does non-isolated output mean for my application?
Non-isolated channels share a common terminal within the module. This works well when all loads use the same AC power source. You must ensure proper wiring to avoid ground loops.
Q2: What is the maximum current per channel on the 1794-OA16?
Each output channel supports a maximum of 500 mA at 55°C. The total module current must not exceed 4.0 Amps. Distribute your loads accordingly to stay within these limits.
Q3: How does the output signal delay affect my system?
The module has a maximum delay of ½ cycle for switching states. At 60 Hz, this equals about 8.3 milliseconds. This delay is acceptable for most relay and contactor applications.
Q4: Can I use this module in a high-vibration environment?
Yes, the module is tested for 5g vibration from 10 to 500 Hz. It also withstands 30g operating shock. Ensure the DIN rail mounting is secure for best results.
