Braun RA500 - Manual (Page 12)

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RAMP OPERATION
Ramp Power Operation
Ramp Operating Instructions
address the required controller
inputs and the corresponding
ramp functions. Instructions for
customer specific display panels
and interlock options will not be
addressed due to the bound-
less variations in application and
installation of the ramp. Manual
Operating Instructions are ad-
dressed in the event of power or
equipment failure.
Before Operating Ramp: Al-
ways park the vehicle on a level
area, away from vehicle traffic.
Place the vehicle transmission
in “Park” and engage the park or
emergency brake.
Customer Interlock: The ramp
controller requires either a ground
(-) or (+) signal be supplied, one
of these signals is required but
not both. This signal interlocks
the ramp functions. If this inter-
lock signal is not present, the
controller will not provide any
outputs necessary to operate the
ramp. If the interlock signal is
lost during ramp operation, the
platform assembly will stop, and
the controller will not function any
further until the interlock signal is
present once again.
Operator Input Switches: The
RA500 Ramp electronic controller
provides fully automatic operation
of all ramp functions. Ramp func-
tions can be performed from any
position the platform assembly
happens to be in at the time the
operator input switch is activated.
The ramp is protected by a stan-
dard obstruction sensing feature.
One-Touch Operation: In one-
touch mode, the ramp will deploy
if fully stowed. If the ramp is in
any other position the ramp will
stow. The ramp function will con-
tinue until the switch is pressed
again (indicating stop immedi-
ately), the unit reaches the end of
travel, or a “halt condition” occurs
(see Halt Conditions).
Two-Way Toggle Operation:
In two-way toggle mode, there
are separate switches for de-
ploy and stow functions. One of
the switches must be pressed
and held or locked into position
(continuous input signal required)
for the RA500 ramp to oper-
ate. The ramp will move in the
selected direction until the switch
is released (signal interrupted),
the unit reaches the end of the
travel, or a “halt condition” occurs
(details follow).
Halt Conditions: Several condi-
tions can cause a normal se-
quence to terminate (stop):
• Obstructions (details below)
• Customer Interlock signal lost
(see Customer Interlock)
• Optional platform weight sens-
ing pad senses a load equal to
or greater than 5 kilograms
(details below)
• End of travel reached
Obstructions: The controller
performs obstruction sensing
(see RA500 ramp Terminology:
Obstruction Sensing) on all stow
and deploy movements of the
ramp. The selected obstruction
response mode configured in
the controller during installation,
either immediately stops the pres-
ent movement when obstructed,
or stops and then reverses
movement for  second. Once an
obstruction has halted the ramp,
the controller automatically resets
and awaits operator input for
further operation.
Weight Sensing Pad (optional):
The platform can be equipped
with a weight sensing pad. This
optional feature will cause the
ramp not to operate in the event
that 5 kilograms or more is on
the ramp platform.