User's Manual

1027145–0001 Revision E 6–24 Installing indoor hub equipment Hub installation
WARNING
To avoid the risk of electric shock, make
sure the dc power source breaker is off
before installing a remote power–off
circuit. Use a continuity tester to verify
that power is off.
To install a power–off circuit (if needed), follow these steps:
1. Make sure the rectifier breaker switch is off.
2. Install a UL–approved terminal block inside a UL–approved
electrical junction box as shown in figure 6-14.
Figure 6-14 Remote power–off circuit
hb001
++
––
Use only UL
listed parts.
Junction
box
Terminal
block
Output from
dc power rectifier
Input to IDU
chassis
Conduit with conduit coupler
Jumper 1
Jumper 2
Use insulated jumpers
connect remote power-off
switch in series.
or
3. Choose one of the following three options:
If you plan to add a power–off switch later, install jumpers 1
and 2, and replace the junction box cover. This completes
the circuit installation.
If you are installing a double–pole remote power–off switch,
use a double–pole, single–throw switch rated at 60 Vdc, 15
amperes (minimum):
In place of jumper 1, wire the switch between the (+)
terminal from the rectifier and the (+) terminal from
the IDU.
In place of jumper 2, and wire the switch between the
(–) terminal from the rectifier and the (–) terminal
from the IDU.