Installation guide

4.Connecting to a Power Source and Turning On the Power
28 AlterPath OnBoard Installation Guide
T To Connect DC Power Terminal Blocks to a
DC Power Source and Turn OnBoard Power
On
DC models have two terminal blocks. You need to connect two screws on
each terminal block to a red return wire and a black -48VDC wire from your
DC power source, and to connect a third screw from each terminal block to a
green ground wire that is grounded either on the power supply or elsewhere.
1. Make sure the OnBoard’s power switch(es) are off.
2. Do the following steps twice to wire both terminal blocks to independent
power sources.
a. Loosen the hex screw labeled RTN, attach the red wire (positive)
from the DC power supply to the screw, and tighten the screw again.
b. Loosen the hex screw labeled -48VDC, attach the black wire (return)
from the DC power supply to the screw, and tighten the screw again.
The following figure illustrates the red wire connected between the
positive connector and the RTN screw and the black wire connected
between the negative connector and the -48VDC screw.
c. Loosen the hex screw labeled with the ground symbol, attach a green
grounded wire to the screw, and tighten the screw again.
DC power source
RTN
-48vdc
-48vdc
+25%
- 36%
6a
Black wire
- Negative
+ Positive
Red wire