A-B 1785-KA3

Allen-Bradley Data Highway Plus Local Area Network

Product Data

The Allen-Bradley Data Highway Plus (figure 1) is an economical baseband local area network (LAN) that provides:
• remote programming capabilities
• industrial-hardened interfaces
• easy reconfiguration to meet changing manufacturing needs

Data Highway Plus features:

• remote programming of any PLC-2, PLC-3, or PLC-5 on your networkwith Allen-Bradley 6200 Series Software

• direct connection to PLC-5s and Industrial Programming Terminals

• transparent connectivity with Data Highway, Data Highway II, andbroadband networks

• token-passing protocol that provides efficient and reliable data transport

Data Highway Plus Cabling

Cabling provides the medium for transporting data between nodes.

Your Data Highway Plus cabling system consists of the following parts

• a trunkline

• droplines

• station connectors and terminators

Important: Do not put Data Highway or Data Highway II nodes directly on a Data Highway Plus trunkline.

Trunkline and Droplines

The Data Highway Plus trunkline is the main channel of communication on the network. The trunkline is twinaxial cable with a maximum length of 10,000 feet.

Droplines connect each node to the trunkline and are made of the same cable as the trunkline. A dropline can be up to 100 feet long. Allen-Bradley offers a 15-pin female connector kit (catalog no. 1771-XE) that you can use to connect the dropline to the node.

When planning and installing your cable system:

• use only the cable specified in the Ordering Information section of this document

• isolate the cable from high amounts of electrical noise or high voltage

• avoid tension by providing some slack in the cable

For more information on Data Highway Plus cabling, refer to the DataHighway Cable Assembly and Installation Manual (publication1770-6.2.1).

The 1784-KA3 PLC-2 Family Adapter Module

You can connect a PLC-2 family programmable controller to your Data Highway Plus network using the 1784-KA3 interface mounted in a Bulletin 1771 I/O chassis. For more information on the 1785-KA3, refer to the 1785-KA3 User’s Manual (publication 1785-6.5.3).

Specifications for the 1785-KA3 

Other models：1771-NT2 ，1771-OA ，1771-OAD ，1771-OB ，1771-OBN ，1771-OD ，1771-OD16 ，1771-ODD ，1771-OFE1 ，1771-OFE