Watchdog II Mesh User Manual
P/N 86-0006-00
Rev E 01-2020
Page
19 of 38
1.6.7
Step 6b: Rectifier Secondary Tap Option (Low voltage AC)
If you wish to power the unit from the secondary tap of the rectifier, follow the procedure below:
A. Set the AC/DC voltage select switch (SW2) to the
LO V IN
position. This switches the Base
Station from high voltage power to low voltage power.
B. With the rectifier powered ON, use an AC voltmeter to find a pair of coarse or fine taps that
produce an AC voltage between 8 and 30 volts AC (12 to 25 volts if using the same source for
interrupter power).
C. Turn OFF the rectifier power.
D. Connect the #20 AWG 2-conductor power cable supplied with the RMU to
‘+’ and ‘-’ pins
of the J2 connector (see photo above).
The polarity of the wires DOES NOT MATTER. Run
the wires through the liquid-tight fitting on the bottom of the RMU case and through the liquid-
tight flexible conduit to the rectifier.
E.
Using 3/8” ring terminals, connect the power cable to the previously identified rectifier taps.
Once again, the polarity of the connection DOES NOT MATTER.
1.6.8
Step 6c: Low Voltage DC Power Option (+10 to 35 volts DC)
Use this option to power the RMU from the DC output of a TEG a large Solar Powered System, or a
small Solar Powered Trickle Charge system.
A. Set the HI/LO Input Voltage select switch (SW2) to the
LO V IN
position. This switches the
Base Station from high voltage power to low voltage power.
B. Make sure that the DC power source is turned OFF.
C.
Connect the #20 AWG 2-
conductor power cable supplied with the RMU to ‘+’ and ‘-’ pins
of the J2 connector (see photo above).
If the incoming DC voltage is to be monitored by the
RMU, the polarity of the wires DOES MATTER. Run the wires through the liquid-tight fitting on
the bottom of the RMU case and through liquid-tight flexible conduit to the power source.
D. Connect the power cable to the DC power source. Once again, if the incoming DC voltage is to
be monitored by the RMU, the polarity of the wires DOES MATTER.
1.6.9
Step 7: Wire External Inputs
A. Discrete Inputs
a. Wire one discrete input per connector input. All inputs share one common ground
reference pin. Discrete input pins are pins 1 through 4 of J4. Pin 9 of J4 is the ground
reference pin.
B. Digital Output
a. If the digital output is to be used to control a miscellaneous device, the device should be
wired between pin 5 of J4 and the ground reference pin 9 of J4.
C. Accumulator
