38
900-00277-01-001 Rev A ©2021 OutBack Power. All Rights Reserved.
Operation
Rapid Shutdown (RSD)
In an emergency, a responder may need to quickly place the system in a de-energized state.
The auxiliary (
A
UX
) terminal block has terminals designed to receive signals from OutBack Power’s
RSI (Rapid Shutdown Initiator) or a similar rapid shutdown device.
Figure 25 AUX terminals
Terminals
5
and
6
are used for the rapid shutdown function. These terminals can receive rapid
shutdown (RSD) commands to quickly shut down the Mojave inverter. The terminals detect
electrical continuity, which is present while the RSD contacts remain closed. If a rapid shutdown
event occurs (an RSD switch is opened), these contacts will open. The circuit will detect the loss of
continuity and the inverter will shut down. The inverting function will not operate. The inverter will
not accept power from AC sources, and consequently cannot transfer power or charge batteries.
Any initiator device with normally-closed contacts can work with this function. If more than one
device is used, all contacts must be wired in series so that any device will shut down the inverter.
If a rapid-shutdown device is not installed, this function should be disabled. This is performed by
directly shorting terminals
5
and
6
with a small wire. A jumper is installed at the factory for
this purpose.
IMPORTANT:
A jumper is factory-installed on terminals
5
and
6
. It may need to be removed if another
device is installed.
The inverter will not function unless the jumper, the RSI, or a similar normally-closed
device is installed. Initial power-up will result in a Rapid Shutdown signal
.
The
AUX 12V
connections (terminals
1
and
2
) or
AUX Relay
connections (terminals
3
and
4
) can
activate an alarm in response to a rapid shutdown. The
AUX 12V
or
AUX Relay
menu item should
be set to
Rapid Shutdown
.
It is most common for the rapid shutdown function to be implemented separately in the GD inverter.
If the GD inverter has terminals for an external connection (“daisy-chaining”), they can be
connected to terminals
5
and
6
to cause rapid shutdown in the Mojave inverter. If another external
device requires rapid shutdown, the RSD output on terminals
7
and
8
can be used.
Note that in AC coupling applications (see page 35), a GD inverter may require the RSD function.
1
A
UX
12V+
3
A
UX
Relay 2
5
R
SD
I
NPUT
1
7
R
SD
O
UTPUT
1
9
E
XT
CT
1+
11
E
XT
CT
2+
A
UX
12V
G
ND
2
A
UX
Relay 1
4
R
SD
I
NPUT
2
6
R
SD
O
UTPUT
2
8
E
XT
CT
1–
10
E
XT
CT
2–
12
