Electronic Tiller Arm Card (Etac); Theory Of Operation - prime mover smx45 Master Service Manual

© BT Prime-Mover, Inc.
Return

Electronic Tiller Arm Card (ETAC)

1. Theory of Operation

The programmable motor control functions are performed by
the ETAC housed within the steering control handle. The
ETAC controls. The transistor controller is the slave. The
basic function of the ETAC include the following:
• Monitor relative positioning of the thumb controls to 18
Hall effect sensors for speed and direction control.
• Monitor position of reverser button for reversing of the
truck direction.
• Monitor truck performance and provide input data and
commands to the service display.
• Provide lift/lower input commands to the transistor
controller.
• Monitor horn switches S18-1 and S18-2 for horn
operation.
• Monitor and define truck performance parameters.
• Fully compatible for programming, diagnostic and test
information.
• Armature current controlled at all times, reducing
arcing and brush wear.
• Automatic neutral braking: adjustable plugging force.
• Truck acceleration and response controlled through
programmable parameters.
• Linear temperature cutback on motor current limit. No
sudden loss of power under thermal conditions.
• Interlock features ensure proper start-up sequence.
• Integral fault LED provides a "transistor controller
operating properly" signal and flashes error code
information when a fault occurs.
Master Service Manual 2004-03-10
F-code Section
PT S5.8
Electronic Tiller Arm Card (ETAC)
Version no T-code
000 SMX
C-code
5700
249