1770-KF2 | Allen-Bradley Data Highway/Data Highway Plus Asynchronous Interface Module
1770-KF2 | Allen-Bradley Data Highway/Data Highway Plus Asynchronous Interface Module
1770-KF2 | Allen-Bradley Data Highway/Data Highway Plus Asynchronous Interface Module
    1770-KF2 | Allen-Bradley Data Highway/Data Highway Plus Asynchronous Interface Module
1770-KF2 | Allen-Bradley Data Highway/Data Highway Plus Asynchronous Interface Module

1770-KF2 | Allen-Bradley Data Highway/Data Highway Plus Asynchronous Interface Module

Part #: 1770-KF2 Manufactured by: Allen-Bradley
$3,885.00
$3,885.00
4 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
Allen-Bradley 1770-KF2 Data Highway or Data Highway Plus Asynchronous RS-232-C/RS-422-A Interface Module
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Product Description P/N: 1770-KF2

Description / Specifications

Description 

The Allen-Bradley 1770-KF2 is a communication interface module used to link RS-232-C or RS-422-A devices to Data Highway and Data Highway Plus networks. Identified by part number 1770-KF2, it provides multiple EIA D-connector interfaces for DH, PCL, and asynchronous communications. Designed for tabletop use in controlled environments, it supports standard communication rates for industrial network integration.

 

 

Technical Specifications

Condition New/Never Used Surplus
Brand Allen-Bradley
Category PLCs/Machine Control
Part Number 1770-KF2
Subcategory Communication Module
Series PLC-5
Module Type Data Highway/Data Highway Plus asynchronous interface
Power Supply 0.3 A @ 115/230 VAC
Frequency 50/60 Hz
Communication Speeds 57.6 kbps (DH, PCL); 110–9600 bps (asynchronous)
Communication Ports 15-pin DH; 15-pin Peer Link; 9-pin DH Monitor; 25-pin RS-232-C/RS-422-A
Operational Temperature 0 to 45 °C (32 to 113 °F)
Storage Temperature –40 to 85 °C (–40 to 185 °F)
Humidity Rating 10–80% non-condensing
Mounting Tabletop or flat horizontal surface
Dimensions 263.5 × 254 × 85.7 mm
Cabling 1770-CD (DH); user-supplied RS-232-C/RS-422-A cables
Interface Type RS-232-C / RS-422-A

 

 

Information About 1770-KF2

The 1770-KF2 is part of the Allen-Bradley PLC-5 communication family and serves as an asynchronous bridge between serial devices and Data Highway/Data Highway Plus networks. Its construction includes four dedicated D-sub connectors: DH, Peer Communication Link, DH Monitor, and one 25-pin asynchronous RS-232-C/RS-422-A port. The module integrates smoothly with PLC-2, PLC-3, PLC-4, PLC-5, and various minicomputer/microcomputer systems for point-to-point or multidrop communication. Typical applications include network troubleshooting, serial device interfacing, legacy controller communication, and installation environments requiring fixed, stable operation on a horizontal surface.

Key Features:

  • Multi-protocol interface: Supports Data Highway, Data Highway Plus, and asynchronous RS-232-C/RS-422-A.
  • Four communication ports: DH, Peer Link, DH Monitor, and asynchronous serial.
  • Adjustable baud rates: 57.6 kbps for DH/PCL and 110–9600 bps for asynchronous links.
  • Tabletop installation: Designed for office/control-room mounting in non-industrial atmospheres.
  • AC-powered module: Operates from 115/230 VAC at 0.3 A.
  • Device compatibility: Interfaces PCs, PLC-2/3/4/5 systems, and other serial equipment.
  • Environmental tolerance: Operates from 0–45 °C with 10–80% non-condensing humidity.

The 1770-KF2 delivers the reliability and precision required for stable serial-to-Data Highway communication in legacy Allen-Bradley network environments.

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Frequently Asked Questions about 1770-KF2
Question: What is the Allen-Bradley 1770-KF2?
Date Update:18/06/2025
Answer:

The 1770-KF2 is a communication interface module that allows a computer or programming terminal with an RS-232 serial port to communicate with devices on an Allen-Bradley DH+ (Data Highway Plus) network. It was widely used to link PLC-5, SLC 5/04, and other legacy DH+ devices with personal computers before Ethernet/IP became the standard.

Question: How do I wire the 1770-KF2 for RS-232 and DH+?
Date Update:18/06/2025
Answer:

On the RS-232 (serial) side:

  • The KF2 has a DB25 female port for RS-232. Common connections are:
    Pin 2: Transmit Data (TX)
    Pin 3: Receive Data (RX)
    Pin 7: Signal Ground (GND)
  • Typically connected to a PC via a null modem cable or custom cable, depending on the port configuration.

On the DH+ side:

  • It uses blue and clear wires on a three-position terminal strip:
    Blue = DH+ line A
    Clear = DH+ line B
    Shield = Drain/ground

Be sure to follow the polarity, maintain the characteristic 150-ohm impedance, and terminate the network correctly at each end.

Question: What is the pinout of the 1770-KF2 RS-232 port?
Date Update:18/06/2025
Answer:

The KF2 has a DB25 female connector. Most common pin usage includes:

  • Pin 2 – TXD (output from KF2)
  • Pin 3 – RXD (input to KF2)
  • Pin 7 – GND

Some configurations may also connect RTS/CTS or DSR/DTR for handshaking depending on the host PC and DF1 driver.

Use a null modem cable when connecting to a PC COM port.

Question: What software is used to communicate through the 1770-KF2?
Date Update:18/06/2025
Answer:
  • RSLinx Classic is typically used to create a DF1 driver for serial communication. The KF2 translates DF1 messages into DH+ commands.
  • After setting the correct baud rate, COM port, and handshaking, the PC can access all PLCs on the DH+ network.
  • Compatible with programming software like RSLogix 5, RSLogix 500, and legacy APS.
Question: How do I configure the 1770-KF2?
Date Update:18/06/2025
Answer:

KF2s are typically preconfigured at the factory, but some versions allow DIP switch setting for node address and baud rate. Most used models were configured to run at 57.6 or 115.2 kbps with a unique DH+ node address.

Settings must match other DH+ devices (e.g., PLC-5s, SLC 5/04) to ensure successful communication.

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IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1770-KF2 is a communication interface module used to link RS-232-C or RS-422-A devices to Data Highway and Data Highway Plus networks. Identified by part number 1770-KF2, it provides multiple EIA D-connector interfaces for DH, PCL, and asynchronous communications. Designed for tabletop use in controlled environments, it supports standard communication rates for industrial network integration.

 

 

Technical Specifications

Condition New/Never Used Surplus
Brand Allen-Bradley
Category PLCs/Machine Control
Part Number 1770-KF2
Subcategory Communication Module
Series PLC-5
Module Type Data Highway/Data Highway Plus asynchronous interface
Power Supply 0.3 A @ 115/230 VAC
Frequency 50/60 Hz
Communication Speeds 57.6 kbps (DH, PCL); 110–9600 bps (asynchronous)
Communication Ports 15-pin DH; 15-pin Peer Link; 9-pin DH Monitor; 25-pin RS-232-C/RS-422-A
Operational Temperature 0 to 45 °C (32 to 113 °F)
Storage Temperature –40 to 85 °C (–40 to 185 °F)
Humidity Rating 10–80% non-condensing
Mounting Tabletop or flat horizontal surface
Dimensions 263.5 × 254 × 85.7 mm
Cabling 1770-CD (DH); user-supplied RS-232-C/RS-422-A cables
Interface Type RS-232-C / RS-422-A

 

 

Information About 1770-KF2

The 1770-KF2 is part of the Allen-Bradley PLC-5 communication family and serves as an asynchronous bridge between serial devices and Data Highway/Data Highway Plus networks. Its construction includes four dedicated D-sub connectors: DH, Peer Communication Link, DH Monitor, and one 25-pin asynchronous RS-232-C/RS-422-A port. The module integrates smoothly with PLC-2, PLC-3, PLC-4, PLC-5, and various minicomputer/microcomputer systems for point-to-point or multidrop communication. Typical applications include network troubleshooting, serial device interfacing, legacy controller communication, and installation environments requiring fixed, stable operation on a horizontal surface.

Key Features:

  • Multi-protocol interface: Supports Data Highway, Data Highway Plus, and asynchronous RS-232-C/RS-422-A.
  • Four communication ports: DH, Peer Link, DH Monitor, and asynchronous serial.
  • Adjustable baud rates: 57.6 kbps for DH/PCL and 110–9600 bps for asynchronous links.
  • Tabletop installation: Designed for office/control-room mounting in non-industrial atmospheres.
  • AC-powered module: Operates from 115/230 VAC at 0.3 A.
  • Device compatibility: Interfaces PCs, PLC-2/3/4/5 systems, and other serial equipment.
  • Environmental tolerance: Operates from 0–45 °C with 10–80% non-condensing humidity.

The 1770-KF2 delivers the reliability and precision required for stable serial-to-Data Highway communication in legacy Allen-Bradley network environments.

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