Auxiliary Line Low Power & Impedance - iButtonLink LINK 12 User Manual

Auxiliary Line Low Power & Impedance
Command " z " (lowercase Z)
Command Compatible With:
LinkUSB
For The Link, The LinkOEM, and The LinkUSB, this command takes the auxiliary line to a
LOW level and LOW impedance.
For The LinkHub-S and The LinkHub-E, this command turns off the switched +5 V line to
the output connectors.
For the LinkHub-S, the LinkHub-E, and the LinkOEM, the load on the auxiliary line should
be limited to less than 20 mA.
The Link supports the standard RJ-11/RJ-45 type 1-Wire® bus connection, where the two center
contacts of the RJ connector are the data and ground connections to the 1-Wire® bus. An
auxiliary pin in the RJ connector can be added and used as an output to supply a low level (0 V)
or a high level (5 V). It can also be an input, sensing a 0 - 5 V logic level. This extra I/O defaults
to input (Hi-Z) mode.
The Link USB supports the standard RJ-45 type 1-Wire® bus connection where the center two
contacts of the RJ connector are the data and ground connections to the 1-Wire® bus. An
Auxiliary pin in the RJ connector can be added and used. By default, this line is driven to the
HIGH impedance state and left unpowered. It can be an output to supply a low level (0 V) or a
high level (5 V). It can also be used as an input, sensing a 0 - 5 V logic level. When set to the 5 V
level using the "d" command, this line can provide power for \1-Wire® devices. The current
available is limited to approximately 75 mA.
S C
IMILAR OMMANDS
• " d " – Auxiliary Line High Power and Low Impedance
• " & " – Auxiliary Line High Impedance
• " " " – Auxiliary Output Isolation Mode
:
The LINK™ Family Manual
Version 1.6 ©iButtonLink, LLC 2016
Link | LinkHub-S | LinkHub-E | LinkOEM |
Page 17