User guide

midon design
1WSwitch User Guide Version 1.02 Page 18 of 28
7. J5 Usage
J5 is an RJ-12 connector, which is equivalent to a phone connector, except that it
has 6 pins instead of just 4 (or 2). J5 is connected to the One Wire bus and can
be used for adding connectivity to One Wire busses configured for RJ-11/12
connection.
The pin-out of the J5 connector is shown in Figure 4.
Figure 4 Connector J5 RJ-12 Pin-out
Pin 1 is derived from the power supply feeding 1WSwitch. It is DC rectified, so it
will not matter if your power supply is AC only.
Please note that this pin-out may be different than that of your 1-Wire
sensors. At one time, there was no established standard pin-out for the RJ-12
wiring and, as a result, different manufacturers have chosen to use the pins in
various ways. The common pins (DQ and Ground) have remained the same for
all manufacturers, however, as of the time of writing this manual. These pins are
shown in color in the table below. Some of the published pin-outs available
today are shown in the table below. Please take caution in connecting up your 1-
Wire sensor to 1WSwitch to avoid damaging the sensor.
Table 3 RJ-12 Pin-outs in use
Device Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6
Dallas/Maxim wiring standard (published
Oct 2001)
+5VDC GND DQ GND N/C DC Supply
Midon Design MD2004 TEMP05 N/C +5VDC DQ GND N/C N/C
Midon Design MD2104 1WSwitch
DC
Supply
+5VDC DQ GND N/C N/C
Midon Design MD2204 LOG08
DC
Supply
+5VDC DQ GND N/C N/C
Midon Design MD3009 Temp Sensor N/C +5VDC DQ GND N/C N/C
Midon Design MD3020x Temp and
Humidity Sensor
DC
Supply
+5VDC DQ GND N/C N/C