1-Wire connection

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Most 1-Wire modular connectors have ground (sometimes called "1-Wire Return") on pin 4, 1-Wire data and power on pin 3. Ground is usually connected to pin 2 as well.

Most 1-Wire devices leave pins 1, 5 and 6 unconnected (or only passed through if the device has multiple connectors).

Most 1-Wire devices have 6P6C (6 position, 6 conductor) RJ connectors. Pins are numbered 1 through 6. (In AAG and Dallas literature the jacks are sometimes referred to as "RJ12" because they have 6 conductors; but they aren't really RJ12, RJ25 or any other RJ because the RJ standards specify both the connector and the (telephone) signalling.)

Subtract 1 from the 6P6C pin number in order to obtain the pin number for a 6P4C (6 position, 4 conductor) modular connector. Add 1 to get the 8P8C pin number.

In the lists a hyphen indicates connection and an ex no connection. On the left is connection to the other jack; on the right connection internally.

Bare minimal:

  • 3 - data and +5 volt power
  • 4 - ground

"Basic" connection connects all pins between the jacks but only connects pins 2, 3, 4 internally, with 2 and 4 (ground) connected together.

  • - 1 x
  • - 2 - ground
  • - 3 - data and +5 volt power
  • - 4 - ground
  • - 5 x
  • - 6 x

Contents

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EDS HA7Net

The HA7Net Ethernet 1-Wire bus master connects only pins 3 and 4 (not 2) but it can be jumpered to supply +5V on pin 6 (yes, pin 6). It has three RJ connectors wired in parallel.

  • - 1 x
  • - 2 x
  • - 3 - data and +5 volt power
  • - 4 - ground
  • - 5 x
  • - 6 - +5 volt regulated auxiliary power output (optional via jumper)
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AAG TAI8520

The AAG TAI8520 has only the basic connections: pins 2, 3, 4.

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AAG TAI8530

The TAI8530 1-Wire power supply has the basic connection (pins 2, 3, 4) and additionally puts +5V on pin 1 of the "Out" jack. It also supplies +12V filtered unregulated on pin 6. Pins 1 and 6 of the "In" jack are not connected.

"Out" jack:

  • x 1 - +5 volt regulated auxiliary power output
  • - 2 - ground
  • - 3 - data and +5 volt power
  • - 4 - ground
  • - 5
  • x 6 - +12 volt filtered unregulated auxiliary power output
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AAG TAI8540

The AAG TAI8540 has only the basic connections (pins 2, 3, 4) but appears to be partially prepared to have additional wires attached.

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AAG TAI8558

The TAI8558 1-Wire multiple I/O board has the basic connection (pins 2, 3, 4) and accepts auxiliary power input on pin 1. It can thus be auxiliarily powered by the TAI8530 1-Wire power supply.

  • - 1 - auxiliary power input
  • - 2 - ground
  • - 3 - data and 5 volt power
  • - 4 - ground
  • - 5 x
  • - 6 x
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AAG TAI8570

The TAI8570 1-Wire pressure sensor has the basic connection (pins 2, 3, 4) and accepts auxiliary power input on pin 1. It can thus be auxiliarily powered by the TAI8530 1-Wire power supply.

  • - 1 - +5V auxiliary power input
  • - 2 - ground
  • - 3 - data and 5 volt power
  • - 4 - ground
  • - 5 x
  • - 6 x
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AAG TAI8595

The TAI8595 1-Wire hub has the following connectors:

In

  • 1 ?
  • 2 ?
  • 3 - data and +5 volt power
  • 4 - ground
  • 5 ?
  • 6 ?

Out

  • 1 ?
  • 2 ?
  • 3 - data and +5 volt power
  • 4 - ground
  • 5 ?
  • 6 ?

WSI connector:

  • 1 ?
  • 2 - +? volt power
  • 3 - data and +5 volt power
  • 4 - ground
  • 5 ?
  • 6 ?

C1-6

  • 1 ?
  • 2 ?
  • 3 - data and +5 volt power
  • 4 - ground
  • 5 ?
  • 6 ?
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AAG 1-Wire Wind Instrument

The AAG 1-Wire Wind Instrument RJ connector allows for auxiliary power input on pin 2; it connects ground to pin 5. N.B., this means that if the weather station is connected to other 1-Wire devices by means of a 4-conductor cable then it cannot be supplied with auxiliary power because pin 2 is grounded by the other 1-Wire devices.

A little jumper plug can be installed in one of the weather instrument's two jacks; this plug connects pins 2 (auxiliary power) to pin 5 (ground), thus disabling (grounding) the auxiliary power input. This is needed if the weather instrument is connected by means of a two-conductor cable (which connects only pins 3 and 4) -- e.g., the coiled cable supplied with the weather instrument. To supply auxiliary power to the w.i. temperature sensor the jumper plug must be removed and a three- or four-conductor cable used and connected the w.i. to a device that supplies +5V on pin 2. The "WSI" output on the TAI8595 1-Wire hub fits this description.

  • x 1 x
  • - 2 - auxiliary power input
  • - 3 - data and +5 Volt power
  • - 4 - ground
  • - 5 - ground
  • x 6 x
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iButtonLink LinkHubE

  • The iButtonLink LinkHubE uses an 8 position RJ connector but connects the outer two pins to ground. For extra fun the user's manual of the LinkHub-E numbers the pins in reverse. We use the non-reversed numbers here (in parentheses) and, for comparison with other pinouts on this page, give the corresponding 6P numbers. Auxiliary power follows the pin pattern of the TAI8530 1-Wire power supply but also includes switched 5 on pin 6 (5).
  • (1) - ground
  • (2) 1 - +5V
  • (3) 2 - ground
  • (4) 3 - data and +5 volt power
  • (5) 4 - ground
  • (6) 5 - switched 5
  • (7) 6 - +12V
  • (8) - ground
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