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Curtis PMC 1204X/1205X/1209/1221 Manual
operator by the advancing vehicle, the controller provides enhanced plug braking
current to stop the vehicle quickly and reverse its direction.
The 1204X/1205X/1209/1221 controllers are available either with or with-
out the emergency reverse feature.
Environmental protection
Curtis PMC 1204X/1205X/1209/1221 controllers are housed in rugged anod-
ized aluminum extrusions that provide environmental protection. Controllers
must be kept clean and dry, however, to ensure long life.
ET-series electronic throttles
The ET-XXX is a wigwag-style throttle control assembly, manufactured by
Hardellet for Curtis. It provides a 0–5V signal in both the forward and reverse
directions along with high side coil drivers for the forward and reverse contactor
coils.
High current coil drivers
The 1204X/1205X/1209/1221 controllers are available, on request, with high
current drivers for the forward/reverse and bypass contactor coil inputs. These
high current coil drivers, which are rated at 2 amps rather than the standard 1 amp,
are necessary to accommodate contactors with rated coil currents above 1 amp.
The recommended Albright contactors do not require high current coil drivers.
High pedal disable (HPD)
By preventing the vehicle from being turned on with the throttle applied, HPD
ensures the vehicle starts smoothly and safely. If the operator attempts to start the
vehicle when the throttle is already applied, the controller (and the vehicle) will
remain off. For the vehicle to start, the controller must receive an input to KSI
before receiving a throttle input. In addition to providing routine smooth starts,
HPD also protects against accidental sudden starts if problems in the throttle
linkage (e.g., bent parts, broken return spring) give a throttle input signal to the
controller even with the throttle released.
The 1204X/1205X/1209/1221 controllers are available either with or with-
out the HPD feature.
KSI
KSI (Key Switch Input) provides power to the controller's logic circuitry via both
the keyswitch and the footpedal microswitch. KSI should be used to turn the
controller on and off.
[OPTIONAL FEATURE]
GLOSSARY
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