Description
Product Introduction & Engineering Value
When DeviceNet communication suddenly stops during commissioning, replacing I/O modules rarely solves the problem. In many cases, engineers simply need a reliable interface between the engineering workstation and the DeviceNet network to identify node conflicts, verify baud rates, or update device parameters.
The 1770-KFD was developed specifically for that purpose. Acting as an RS-232-to-DeviceNet gateway, it allows maintenance personnel to access DeviceNet networks without installing a permanent communication scanner, making it particularly useful for field service, startup, and diagnostics.
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Catalog Number | 1770-KFD |
| Product Family | DeviceNet Communication Products |
| Module Type | RS-232 to DeviceNet Interface |
| Host Interface | RS-232 (9-pin D-sub) |
| Network Interface | 5-pin DeviceNet connector |
| Communication Network | DeviceNet |
| Status Indicators | Module Status, RS-232 Status, Network Status LEDs |
| Mounting | Portable or DIN Rail |
| Power Source | DeviceNet network power |
| Optional Power | External adapter supported on related models (1770-KFDG) |
| Typical Applications | Device configuration, diagnostics, commissioning, firmware support |
| Lifecycle Status | Discontinued |
| Recommended Replacement | 1784-U2DN USB-to-DeviceNet Interface |
Technical information is based on Rockwell Automation product documentation and installation manuals.
Field Application & The “Trench” Experience
During the startup of a packaging line, several DeviceNet valve manifolds appeared offline even though network voltage measured within specification. The PLC scanner continuously reported communication errors, but replacing cables and terminating resistors had no effect.
A maintenance engineer connected a laptop through a 1770-KFD and immediately discovered duplicate node addresses on two newly installed devices. After assigning a unique address and confirming the correct network baud rate, every DeviceNet node entered normal operation without replacing a single hardware component.
Typical application scenarios include:
- DeviceNet node commissioning on automotive assembly fixtures.
- Variable frequency drive parameter configuration over DeviceNet.
- Packaging machinery maintenance requiring temporary engineering workstation access to a DeviceNet network.
- 1770-KFD
- 1770-KFD
- 1770-KFD
Transparency SOP: QA & Testing
Before shipment, every communication interface undergoes a documented inspection process.
- Verify the catalog number, hardware revision, and manufacturer identification.
- Inspect the RS-232 connector, DeviceNet connector, housing, and LED indicators.
- Connect the interface to a DeviceNet test network.
- Confirm successful communication between a host computer and multiple DeviceNet nodes.
- Verify LED status indication, serial communication, and network diagnostics.
- Record all inspection results before classifying the unit as New Surplus or Refurbished.
The Veteran’s Tech Trap Guide
⚠️ Modern PCs Usually Don’t Include Native RS-232 Ports
Many service laptops require a high-quality USB-to-serial adapter. Poor-quality adapters can introduce intermittent communication failures that appear to be DeviceNet problems.
⚠️ Duplicate Node Addresses Cause More Problems Than Failed Hardware
If the interface cannot establish stable communication, verify node addresses and network baud rate before replacing DeviceNet components.
PRO TIP: The 1770-KFD is intended primarily as an engineering interface, not as a permanent communication gateway. Leaving it installed in a production network for continuous operation is generally not considered best practice. For modernization projects, Rockwell recommends migrating to the 1784-U2DN USB interface.
Dynamic FAQ
Q1. What is the primary purpose of the 1770-KFD?
The 1770-KFD provides an RS-232 connection between a computer and a DeviceNet network, allowing engineers to configure, monitor, and troubleshoot DeviceNet devices.
Q2. Can the 1770-KFD communicate directly with PLC controllers?
Its primary purpose is communication with DeviceNet networks and DeviceNet-compatible devices. It serves as a PC interface rather than a PLC processor or scanner.
Q3. Is the 1770-KFD still manufactured?
No. Rockwell Automation discontinued the 1770-KFD on January 8, 2019. The recommended engineering replacement is the 1784-U2DN USB-to-DeviceNet interface.
Q4. Does the module require external power?
The standard 1770-KFD is normally powered from the DeviceNet network. The related 1770-KFDG version also supports operation with an external power adapter.
Q5. How is New Surplus inventory verified?
Each unit is inspected for connector condition, LED operation, serial communication, DeviceNet connectivity, and successful communication with a reference DeviceNet network before shipment.
Q6. What is the most common communication problem during commissioning?
The most frequent causes are duplicate node addresses, incorrect baud-rate settings, improper network termination, or unreliable USB-to-RS-232 adapters. Verifying these items should be the first step before replacing interface hardware.
Start Chat
