Overview
The Allen-Bradley 1794-OB16P is a FLEX I/O distributed discrete output module designed to energize 24VDC components in industrial automation and control systems. This module has Sixteen (16) Current sourcing outputs, providing 24VDC voltage output. Each channel of this module are electronically protected. The module mounts to compatible FLEX I/O terminal bases and integrates seamlessly into Logix, legacy PLC5, and SLC500 distributed I/O architectures.
Key Features
- Each channel has a minimum output rating of 1.0 mA and maximum of 500 mA per channel.
- The “P” in the catalog number pertain to the electronic fusing embedded with the module. Each channel has embedded electronic fusing.
- Each channel is capable of withstanding surge current of 2 A for 50 ms, repeatable for every 2 seconds.
- The 1794-OB16P’s output delay is 0.5 milliseconds in the OFF to ON state and 1 milliseconds in the ON to OFF state.
- Configurable for source wiring; requires external load connection to 24V return
Technical Specifications
- Output Type: Current sourcing, 24VDC voltage output
- Number of Outputs: 16 discrete digital channels
- Output Current Rating: 8.0A Output Current Rating total module
- Per-Channel Output: Maximum of 500 mA per channel
- Voltage Range: 10–31.2V DC (nominal 24V DC)
- Protection: Each channel has embedded electronic fusing.
- FlexBus Current: 60 mA @ 5V DC
- Power Dissipation: Maximum power dissipation of 5.0 W @ 31.2V DC
- Thermal Dissipation: Thermal dissipation of 17.0 BTU/hr @ 31.2V DC
- Output Delay: 0.5 milliseconds in the OFF to ON state and 1 milliseconds in the ON to OFF state
- Operating Temperature: 0 to 55 degrees Celsius
- Storage Temperature: -40 to 85 degrees Celsius
- Relative Humidity: 5 to 95% non-condensing
- Operating Vibration: 30g
- Non-Operating Vibration: 50g
Typical Applications
This module is used to energize electrical components that operate in 24VDC voltage categories such as indicator light and lamps, solenoid actuated devices, relay coils, and other field instruments. Common use cases include:
- Solenoid valve control (pilot and main stage)
- Indicator lamp and beacon drivers
- Relay coil energization
- Discrete 24VDC equipment activation
- Distributed I/O architecture in process control systems
- Machine automation and material handling applications
Compatibility & Replacements
Compatible With
- Flex I/O communication adapters such as Ethernet, ControlNet, Profibus, Remote I/O communication adapters
- Logix controllers such as ControlLogix and CompactLogix as well as legacy controllers including PLC5 and SLC500 controllers
- FLEX I/O distributed I/O architecture (mixed with other FLEX I/O digital and analog modules)
Replaces / Drop-In Replacement For
- Original equipment manufacturer applications requiring 16-point 24VDC source output with electronic protection
- Functionally equivalent 16-point FLEX I/O discrete output modules in OEM replacement scenarios
- Verify compatibility with your system integrator before ordering for legacy or retrofit applications
Works With
- Compatible terminal bases for this module are 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK
- Rockwell Automation RSLogix 5000 / Studio 5000 programming environments
- EtherNet/IP, ControlNet, and Profibus communication protocols via appropriate communication adapters
- External DC power supply 10–31.2V DC (nominal 24V)
