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Reverse Over-ride
(ROF) and
Ignition Lockout
Functions
The Recreation Vehicle Industries Association (RVIA) of America and some American states require that when a vehicle is in
motion, the TV monitor should be switched off if it is in the view of the driver. Sometimes, the TV monitor is used in
conjunction with a camera to enable the driver to view the area at the back of the vehicle when the vehicle is being
reversed. The TV monitor should normally remain off (if it is in view of the driver) and should power on only when the gear
is shifted to “reverse”. When the gear is shifted to “reverse”, a micro-switch in the reversing mechanism in the vehicle
generates a “+” battery voltage signal that can be used to switch on the TV monitor. This is termed as “Reverse Over-ride
Function (ROF)”. If the TV monitor is powered from the inverter, “ROF” function will enable to switch on the inverter when
the vehicle is reversed and “+” battery voltage signal is fed to the Remote.
Also, some low power circuits in a vehicle are energized when the ignition switch is turned to the “Accessory” position to
provide “+” battery voltage power to low power devices like radio / CD player etc (the vehicle is not running in this position
and hence, high power devices should not be powered as the starter battery will get drained and the vehicle may not start).
When the ignition switch is turned to the “Accessory” position, a “+” battery voltage line is available for actuating the
required devices. As the inverter is a high power consuming device, it should be switched off when the ignition switch is
turned to the “Accessory” position. Hence, the “Ignition Lockout” function is utilized to switch off the inverter when “+”
battery voltage signal is fed to the Remote on activation of the “Accessories” circuit
In the back of the Remote Control, a ¼” male quick disconnect terminal is provided to switch on or switch off the inverter
by feeding “+” battery voltage signal. A jumper is provided in the Remote Control (The jumper is accessible after opening
the bottom cover of the remote control) to select either “ROF” function or “Ignition Lockout” function. The Remote Control
comes preset in “ROF” position
In the preset condition of “ROF”, when the “+” battery voltage signal from the reversing gear system is fed to
the ¼” male disconnect terminal, the inverter is switched on. When “+” battery voltage signal is removed, the
inverter is switched off.
When the alternate “Ignition Lockout” function is selected (by changing the position of the internal jumper),
the inverter shuts down when “+” battery voltage signal from the “Accessories” circuit is applied and switches
on when the “+” battery voltage is removed.
The wire used for feeding the “+” battery voltage signal to the ¼” connector for the ROF or Ignition Lockout functions
should have a 0.5A fuse in series for protection.
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Selecting ROF or Ignition Lockout Functions
Jumper JP1 is placed inside the remote control and is used to select either
Reverse Override Function
or
Ignition lockout
Function
(open the back cover for access to the jumper JP-1).
JP1 jumper “Short” - Reverse Override Function*
JP1 jumper “Open” – Ignition Lockout Function
*Please note that the default mode is
Short
.
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Connect the wire RJ-11 to the remote port in front of the panel.
