2 — INSTALLATION AND WIRING
1212 & 1212P Manual - Sep 2019
pg. 12
Status LED
The 1212/1212P 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 kΩ, 0.5 W. Alternatively, an LED with a built-in resistor
can be used; it should be rated for 24V operation.
Horn / Lift Lockout Output
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.
In 1212P models only,
Pin 3 can be used to drive a relay to control the pump contactor. Setting the
parameter Lift Lockout Enable = On will enable this feature and disable the horn output. Also, if the
parameter External Lift Lockout = On, the lift lockout output will be active if the lift lockout input
is low. The maximum current for this low-side driver is 50 mA.
Reverse Switch / Neutral Input
If a single-ended or unipolar throttle is used, a reverse switch connected to B+ can be used to change
the driving direction to reverse.
In 1212P models only,
this input (Pin 12) can be used for a neutral input. When the parameter Neutral
Input = On, the 1212P will check this input from a wigwag throttle that has neutral output (such as
the Curtis ET-190E). If the neutral input is low, the 1212P will shut off output regardless of throttle
input.
