Allen-Bradley 1794-OV16P Flex I/O Output Module

Allen-Bradley 1794-OV16P Flex I/O Digital Sinking Output Module

Product Introduction

The Allen-Bradley 1794-OV16P is a high-performance digital output module from the Flex I/O family, designed to deliver reliable control for your field devices. It provides 16 sinking outputs, each capable of handling up to 500 mA, with a total module rating of 8.0 A. A standout feature is its built-in electronic protection, which safeguards the module against short circuits, high-temperature conditions, and overloads. This protection enhances system reliability and minimizes downtime, making the 1794-OV16P a smart choice for critical control applications.

Key Technical Specifications

The 1794-OV16P module offers robust electrical characteristics for demanding applications. The nominal on-state output voltage is 24V DC, with a permissible range of 10 to 31.2V DC. The maximum on-state voltage drop is a low 0.2V DC, ensuring efficient power delivery to your loads. For system planning, note the total output current rating is 8.0A per module. The off-state leakage current is a minimal 0.5 mA, and the maximum off-state voltage is 31.2V DC, providing clear isolation when outputs are de-energized.

Output Performance and Protection Features

Performance-wise, the 1794-OV16P delivers fast switching speeds. The maximum output delay time from off to on is 0.5 ms, and from on to off, it is 1 ms. This speed makes it suitable for applications requiring precise timing. The "P" in its designation stands for "Protected." This means the module includes electronic protection that automatically shuts down the output in the event of a fault. Significantly, the module recovers automatically once the fault condition is removed. This automatic recovery happens without passing a fault status to the processor, simplifying error handling in your control logic.

Power and Environmental Parameters

The 1794-OV16P requires an external power supply with a voltage range of 10 to 31.2V DC, accommodating a 5% AC ripple. The current drawn from this supply is between 20 and 65 mA. For internal operation, it draws a FlexBus current of 80 mA at 5V DC. The maximum power dissipation is rated at 4.2W at 31.2V DC, with a maximum thermal dissipation of 14.3 BTU/hr. Furthermore, the module is available in XT versions for extreme environments, offering enhanced temperature tolerance to reduce panel and maintenance costs in harsh conditions.

Mechanical Specifications and Installation

Installing the 1794-OV16P is a straightforward process. You can mount it on a standard DIN rail by simply snapping it into place. It is compatible with terminal base units such as the 1794-TB3 and the 1794-TB3S. These bases facilitate connections between the module, field devices, and the I/O bus. A key advantage of this design is the ability to insert or remove modules under power, which saves time and eliminates the inefficiency of restarting your system for maintenance. The module also features 16 yellow LED status indicators, one for each channel, that provide clear visual confirmation of the output signal status.

Compatibility and Communication

The 1794-OV16P integrates seamlessly into a wide range of industrial networks. It is compatible with various communication adapters supporting protocols such as ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O. This flexibility allows you to deploy the module in virtually any existing Flex I/O system, regardless of the network architecture, making it a versatile solution for system upgrades or new installations.

Packaging List

Your shipment for the 1794-OV16P module will include the following items:

• (1) Allen-Bradley 1794-OV16P Flex I/O Digital Sinking Output Module

• (1) Product Installation Instructions Manual

Note: The terminal base unit (e.g., 1794-TB3, 1794-TB3S) and communication adapter are sold separately.
All products are shipped via FedEx, UPS, or DHL.

Frequently Asked Questions (FAQ)

1. What does the "P" designation mean for the 1794-OV16P?
The "P" in 1794-OV16P stands for "Protected." This indicates the module has built-in electronic protection against short circuits, high temperatures, and overloads, which enhances its durability.

2. What is the total current capacity of the 1794-OV16P module?
The 1794-OV16P has a total output current rating of 8.0A. This means the sum of the current on all active channels cannot exceed this limit.

3. Can I replace the 1794-OV16P while the system is powered on?
Yes, you can install or remove the 1794-OV16P under power. The module does not have direct wiring, making hot-swapping possible and reducing system downtime.

4. What terminal bases are compatible with the 1794-OV16P?
This module is compatible with the 1794-TB3 and 1794-TB3S terminal base units. These bases provide the connection points for your field wiring.

5. Does the 1794-OV16P have visual indicators for each output?
Yes, the 1794-OV16P features 16 yellow LED indicators, one for each channel. These LEDs provide a clear visual indication of the output signal's on or off status for easy troubleshooting.