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- Allen Bradley
- 1787-USADPTR
- U.S. Power Supply Adapter
- USA
- 150 × 45 × 120 mm
- 0.49 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Allen Bradley 1787-USADPTR is a U.S. power supply adapter for the 1770-KFD DeviceNet RS-232 Interface Module. It belongs to the Allen-Bradley Networks and Communication Products family and provides external DC power for the communication interface when power is not supplied through the DeviceNet network.
The adapter accepts 120V AC input and converts it into a regulated 9V DC output at 1A. Its output connects directly to the dedicated power supply connector on the 1770-KFD module.
The 1787-USADPTR is intended for domestic North American power supply arrangements. It is a separately ordered accessory for the 1770-KFD and should not be confused with the global power supply option supplied with the 1770-KFDG configuration.
In practical applications, this adapter allows technicians to operate the 1770-KFD interface independently of DeviceNet network power. This is useful during point-to-point device configuration, network troubleshooting, and maintenance work where an external power source is preferred.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley |
| Brand Owner | Rockwell Automation |
| Model | 1787-USADPTR |
| Product Series | DeviceNet |
| Product Type | U.S. Power Supply Adapter |
| Official Product Designation | U.S. P/S Adapter for 1770-KFD |
| Application | External Power Supply for 1770-KFD |
| Input Voltage | 120V AC |
| Output Voltage | 9V DC |
| Output Current | 1A |
| Power Supply Type | AC-to-DC Adapter |
| Compatible Device | 1770-KFD DeviceNet RS-232 Interface Module |
| Regional Configuration | U.S. Domestic |
| Dimensions | 150 × 45 × 120 mm |
| Weight | 0.49 kg |
Product Features
- 120V AC Input: Intended for domestic U.S. power supply arrangements.
- 9V DC Output: Supplies the required DC voltage to the 1770-KFD interface module.
- 1A Output Capacity: Provides the specified output current for the compatible communication interface.
- Dedicated Module Compatibility: Connects to the external power input of the 1770-KFD.
- Independent Power Operation: Allows the interface module to operate using an external adapter rather than relying exclusively on DeviceNet network power.
- Point-to-Point Configuration Support: Suitable for powering the 1770-KFD during direct communication with individual DeviceNet devices.
- Separate Accessory: Can be ordered independently when an additional or replacement U.S. power adapter is required.
- Regional Power Configuration: Provides a domestic alternative to the global adapter configuration associated with the 1770-KFDG.
Product Working Principle
The 1787-USADPTR works as an external AC-to-DC power conversion device. Its primary function is to convert the 120V AC supply from a domestic electrical outlet into the 9V DC power required by the 1770-KFD communication interface.
After the adapter is connected to the 1770-KFD power supply input, the module receives external electrical power and can perform its communication functions without depending on the DeviceNet network for its own power supply.
The 1770-KFD supports two power supply arrangements:
- External Adapter Power: The 1787-USADPTR supplies 9V DC to the 1770-KFD through its dedicated power connector.
- DeviceNet Network Power: The 1770-KFD can also obtain power from a powered DeviceNet network through its network connection.
When the 1770-KFD is connected to a powered DeviceNet network, the network connection takes priority over the external adapter supply.
The adapter itself does not perform DeviceNet communication, signal conversion, or network diagnostics. These functions are handled by the 1770-KFD interface module.
Role in Allen-Bradley DeviceNet Communication Architecture
Within an Allen-Bradley DeviceNet installation, the 1787-USADPTR provides the external power source for the 1770-KFD RS-232 interface.
The 1770-KFD acts as a communication link between a host computer and DeviceNet devices. It supports direct point-to-point communication and access to devices through an existing DeviceNet network.
The 1787-USADPTR supports this arrangement by supplying the required DC power when external power is selected.
| System Component | Function |
|---|---|
| 1787-USADPTR | Supplies 9V DC external power to the 1770-KFD |
| 1770-KFD | DeviceNet RS-232 communication interface |
| Host Computer | Runs configuration and network diagnostic software |
| RS-232 Cable | Connects the host computer to the 1770-KFD |
| 1787-PCABL | Open-style 5-pin DeviceNet probe cable |
| 1787-TCABL | Sealed T-style DeviceNet connector cable |
| 1787-MCABL | Sealed DeviceNet drop cable |
| DeviceNet Network | Communication network connecting industrial devices |
| 1787-MGR | Allen-Bradley DeviceNet Manager software |
The 1787-USADPTR is a power accessory rather than a network communication component. Its function is limited to supplying electrical power to the compatible interface module.
Industrial Applications
The 1787-USADPTR is primarily used in industrial maintenance, commissioning, and configuration environments where the 1770-KFD DeviceNet interface requires an independent external power source.
| Industrial Application | Typical Use |
|---|---|
| PLC Configuration | Powering the 1770-KFD during direct device configuration |
| DeviceNet Commissioning | Supplying external power during initial network setup |
| Industrial Maintenance | Operating the communication interface during troubleshooting |
| Factory Automation | Supporting DeviceNet communication checks |
| Automotive Production | Powering the interface during controller and device diagnostics |
| Packaging Machinery | Supporting maintenance of DeviceNet-connected equipment |
| Material Handling | Providing external power during network inspection |
| Process Automation | Supporting communication interface operation during servicing |
| System Integration | Powering the 1770-KFD during point-to-point configuration |
| Industrial Repair Workshops | Operating the interface independently of an installed DeviceNet network |
Installation and Maintenance
- Verify the Model Number: Confirm that 1787-USADPTR is the correct U.S. power supply adapter for the 1770-KFD interface module.
- Check Input Voltage: Verify that the available AC supply matches the adapter’s specified 120V AC input.
- Inspect the Adapter: Examine the power supply housing, cable, plug, and output connector for visible damage.
- Check Output Requirements: Confirm that the connected equipment requires the specified 9V DC output and does not exceed the adapter’s rated current.
- Disconnect Power Before Installation: Ensure that the adapter is disconnected from the AC outlet before connecting it to the communication module.
- Locate the Power Input: Identify the dedicated external power connector on the 1770-KFD module.
- Connect the DC Output: Insert the adapter’s output connector into the module’s power supply input.
- Check Connector Engagement: Ensure that the power connector is properly seated and that the cable is not under mechanical tension.
- Connect the AC Supply: Plug the adapter into a suitable 120V AC outlet.
- Verify Module Status: Check the 1770-KFD power and status indicators to confirm that the module starts correctly.
- Check Power Source Selection: If the module is connected to a powered DeviceNet network, remember that network power takes priority over the external adapter.
- Perform Routine Inspection: Periodically inspect the adapter, power cable, connectors, and housing for damage, overheating, or deterioration.
Compatible System Components
| Component | Function |
|---|---|
| Allen-Bradley 1787-USADPTR | U.S. 9V DC Power Supply Adapter |
| Allen-Bradley 1770-KFD | DeviceNet RS-232 Interface Module |
| Allen-Bradley 1770-KFDG | DeviceNet RS-232 Interface Module with Global Power Supply Adapter |
| Allen-Bradley 1787-PCABL | Open-Style 5-Pin DeviceNet Probe Cable |
| Allen-Bradley 1787-TCABL | Sealed T-Style DeviceNet Cable |
| Allen-Bradley 1787-MCABL | Sealed DeviceNet Drop Cable |
| Allen-Bradley 1787-MGR | DeviceNet Manager Software |
Recommended Related Models
| Model | Product Type | Application |
|---|---|---|
| Allen-Bradley 1770-KFD | DeviceNet RS-232 Interface Module | Host computer communication with DeviceNet devices |
| Allen-Bradley 1770-KFDG | DeviceNet RS-232 Interface Module with Global Power Supply | Communication interface with global power adapter |
| Allen-Bradley 1787-PCABL | DeviceNet Probe Cable | Open-style 5-pin device connection |
| Allen-Bradley 1787-TCABL | DeviceNet T-Style Cable | Sealed point-to-point DeviceNet connection |
| Allen-Bradley 1787-MCABL | DeviceNet Drop Cable | Sealed DeviceNet network connection |
| Allen-Bradley 1787-MGR | DeviceNet Manager Software | DeviceNet configuration and communication management |
Key Advantages
- Converts 120V AC input to 9V DC output.
- Provides a 1A output for the 1770-KFD interface.
- Supports independent external power operation.
- Suitable for point-to-point DeviceNet configuration.
- Can be ordered separately as a replacement power adapter.
- Provides the domestic U.S. power supply option for the 1770-KFD.
Technical FAQs
1. Which Allen-Bradley module is compatible with the 1787-USADPTR?
The 1787-USADPTR is specifically intended for the 1770-KFD DeviceNet RS-232 Interface Module. It connects to the module’s dedicated external power supply connector.
2. What are the input and output voltage requirements of the 1787-USADPTR?
The adapter accepts 120V AC input and provides 9V DC output at 1A. It is intended for the domestic U.S. power configuration.
3. Can the 1770-KFD operate without the 1787-USADPTR?
Yes. The 1770-KFD can also receive power through a powered DeviceNet network. When connected to an energized DeviceNet network, network power overrides the external adapter supply.
4. What is the difference between 1787-USADPTR and the power adapter supplied with 1770-KFDG?
The 1787-USADPTR is the separately ordered domestic 120V AC power adapter. The 1770-KFDG configuration includes a global power supply adapter designed for a wider AC input range of 90–260V AC. They serve the same general external power function but have different regional input specifications.