10
Curtis 1212 Manual
After BDI is 100% reset, power is totally shut off (no current used) to avoid
draining the battery.
If your battery charger does not have a dedicated inhibit terminal, you
must wire B- to J2 Pin 3, as shown in Figure 6.
2 — INSTALLATION & WIRING: Switches, etc.
Fig. 6 Wiring to inhibit
operation during battery
charging (for battery
chargers without a
dedicated inhibit
terminal).
Speed Inhibit
A speed inhibit switch can be used to limit drive speed, or even to prevent
drive altogether, in certain conditions; see Inhibit menu. The maximum speed
allowed during inhibit operation is also set in the Inhibit menu, with a setting
of zero preventing drive.
Status LED
The 1212 controller has the capability to drive a panel indicator LED, which
can be used to tell the operator, at a glance, the controller’s status. This LED
always indicates whether the controller is powered on or off. It will also provide
diagnostics information via flash codes (see Section 7).
If a status LED is used, it should be installed with the proper resistor in
series. The controller’s LED driver is capable of a maximum current of 15 mA.
The recommended resistor—designed to limit driver current to 15 mA when
active—is 2.4 k
Ω, 0.5 W. Alternatively, an LED with a built-in resistor can
be used; it should be rated for 24V operation.
Horn
The controller’s horn driver—Pin 3—is designed to drive a low current dc horn
at 1 Hz. The horn sounds a warning when the reverse direction is selected and
when the throttle autocalibration feature is being used. The horn driver sinks a
maximum current of 15 mA. Using a horn with a higher current requirement
will damage and disable the driver.
The horn driver can be used to drive a brake light instead of a horn; see
Brake menu.
Circuitry Protection Devices
To protect the control wiring from accidental shorts, a low current fuse
(appropriately sized for the maximum control circuit current draw) should be
connected in series with the B+ logic supply. A fuse is also recommended in
the high power circuit from the battery to the controller’s B+ terminal. This
fuse will protect the power system from external shorts and should be sized
appropriately for the maximum rated current of the controller.
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