The Allen Bradley 1756 OF8 is a digital output module that can be used with Allen Bradley ControlLogix controllers. This module provides eight channels, each with 24 Volts DC output voltage, and a maximum current of 0.5 Amps per channel. The module is designed for use in industrial environments and is suitable for controlling valves, solenoids, motors, and other devices that require digital outputs.
Wiring Connections
The wiring connections for the Allen Bradley 1756 OF8 module are straightforward, and the module is designed to be easy to install, even for those with little experience or training in industrial automation. The module has two connectors: one for power and one for the field wiring.
Power Connector
The power connector on the 1756 OF8 is a standard power connector that is used to supply power to the module. It is located on the right-hand side of the module and is labeled “Power.” The connector has six pins, two of which are used for power, two for ground, and two for the 24V DC auxiliary supply voltage. The wire colors for the pins are as follows:
| Pin Number | Wire Color |
|---|---|
| 1 | Brown |
| 2 | Green/Yellow |
| 3 | Blue |
| 4 | Gray |
| 5 | White |
| 6 | Red |
Pin 1 is the positive power supply (+24V DC), and pin 2 is the power ground (GND). Pins 3 and 4 are used for the 24V DC auxiliary supply voltage, which can be used to power external devices. Pins 5 and 6 should be left unconnected.
Field Wiring Connector
The field wiring connector on the 1756 OF8 is located on the left-hand side of the module and is labeled “Field Wiring.” The connector has 16 terminals, arranged in four rows of four. Each terminal is used to connect a single output channel to a field device, such as a valve or solenoid. The wire colors for the terminals are as follows:
| Terminal Number | Wire Color |
|---|---|
| 1 | Red |
| 2 | Gray |
| 3 | White/Black |
| 4 | Pink |
| 5 | Brown |
| 6 | Green/Yellow |
| 7 | Blue |
| 8 | Black |
| 9 | Red/Black |
| 10 | Gray/Black |
| 11 | White/Red |
| 12 | Pink/Black |
| 13 | Brown/Black |
| 14 | Green/Yellow/Black |
| 15 | Blue/Black |
| 16 | Black/White |
Each terminal is designed for use with a standard wire gauge of 12 to 22 AWG, and the wire should be stripped to a length of 9 to 10 mm (3/8 inch) before being connected to the terminal. The wiring sequence for the terminals is as follows:
- Connect the positive (+) wire of the first channel to terminal 1.
- Connect the negative (-) wire of the first channel to terminal 2.
- Repeat steps 1 and 2 for each of the remaining channels.
The wiring connections for the Allen Bradley 1756 OF8 module are now complete, and the module can be configured and programmed using Allen Bradley ControlLogix software. The next section provides answers to some frequently asked questions about the module.
FAQ
What is the maximum current that can be supplied by each output channel of the 1756 OF8 module?
Each output channel of the 1756 OF8 module can supply a maximum current of 0.5 Amps. This current is sufficient for most industrial applications and can be used to control a wide range of devices, including valves, solenoids, and motors.
What is the maximum voltage that can be supplied by the 1756 OF8 module?
The 1756 OF8 module can supply a fixed voltage of 24 Volts DC to each output channel. This voltage is suitable for most industrial applications and can be used to drive a wide range of field devices.
What is the purpose of the 24V DC auxiliary supply voltage on the power connector of the 1756 OF8 module?
The 24V DC auxiliary supply voltage on the power connector of the 1756 OF8 module is designed to be used to power external devices, such as sensors or indicators. This voltage is isolated from the output channels and can be used independently of them.
How do I configure the 1756 OF8 module using Allen Bradley ControlLogix software?
The 1756 OF8 module can be configured and programmed using Allen Bradley ControlLogix software. The exact process for configuring the module will depend on the specific application, but the overall process involves configuring the module’s parameters, setting up the output channels, and testing the module’s operation. The Allen Bradley website provides comprehensive documentation and tutorials on the configuration and programming of ControlLogix modules.
What are some common applications for the 1756 OF8 module?
The 1756 OF8 module is suitable for controlling a wide range of devices in industrial environments. Some common applications include controlling valves, solenoids, motors, and other devices that require digital outputs. The module can also be used for general-purpose digital output applications, such as turning on or off warning lights or alarms.
