1 Wire Cables, connectors and pinouts

This page summarizes the factors behind choice of cabling, connectors and pinouts for connecting 1-Wire Master and slave nodes as well as network topology.

1-Wire networks kan work with almost any cables and topology (bus, star, bus+stubs) as long as the overall cable length is short (a few meters). For longer networks, running tens or even hundreds of meters, you need to take many factors into account before deciding on topology, cabling and termination. As a general rule, you should avoid star topology, and stick to a basic bus topology, or a bus with nodes located off short stubs. Use Category 5 (or higher) cabling – the same you typically use for ethernet – and use the right cable cores (twisted pairs), for the right 1-Wire signals and power. Doing that, you can be fairly certain to minimize bus/network errors.

At References section of this page, I have included links to valuable resources on cabling, termination (connectors and pinouts).

References

• A Guide to the 1WRJ45 Standard is a comprehensive guide and recommendation for the use of RJ11/RJ12 and RJ45 on 1-Wire networks
• DESIGN GUIDE – INTRODUCTION TO 1-WIRE NETWORK ISSUES comprehensive guide to 1-Wire network wiring and electrical signals
• 1-Wire Application Guide (midon design)
• 1-Wire® Extended Network Standard (MAXIM APPLICATION NOTE 3925)