8
Curtis 1212S Manual,
Rev. B
SWITCHES AND OTHER HARDWARE
Keyswitch
The vehicle should have a master on/off switch to turn the system off when
not in use. The keyswitch provides logic power for the controller and for the
other control input switches. It must be sized to carry the 150 mA quiescent
logic current plus the current necessary to drive the precharge function (1.5
A for 0.5 seconds) and the horn and any other accessories powered from the
keyswitch circuit.
Emergency Reverse Switch
When the vehicle moves forward or stops, if the emergency reverse switch
is pressed the vehicle will decelerate to a stop (if it was moving) and then be
driven in the reverse direction. The active input level depends on the setting
of the Switch Normally Closed parameter; see page 20.
Emergency Stop Switch
When the emergency stop button is pressed, the 1212S controller shuts off
the EM brake output regardless of vehicle speed, thus engaging the brake
immediately.
Mode Switch
A mode switch is used to select operation in Mode 1 or Mode 2. Typically,
Mode 1 is programmed for slower indoor driving and Mode 2 for faster outdoor
driving; see Speed menu. The controller is in Mode 2 when the mode switch is
in the On position (input connected to B+). Leaving the mode input floating
or actively switching it Off (pulling it to B-) puts the controller in Mode 1.
The two modes have independent programmable settings.
Interlock Switch
The interlock switch, typically implemented as a tiller switch, deadman
footswitch, or seat switch, provides a safety interlock for the system. The switch
is allowed to be cycled within a set time (the Sequencing Delay). This feature is
useful in applications where the switch may bounce or be momentarily cycled
during operation.
Forward/Reverse Switches
Direction switches connected to B+ are used to select the driving direction.
Battery Discharge Indicator (BDI)
The 1212S controller can drive a BDI panel meter to show the battery pack’s
state of charge as a percentage of the ampere-hour capacity of the batteries. The
batteries must be put through a full charge cycle with the controller installed
before the BDI will begin operation.
2 — INSTALLATION & WIRING:
Switches, etc.
