User Manual

TIC LEXION 500 Electric System
03/05 Lex-e-17a 17a-3
Description of function:
1/2
Front attachment circuit Relay K49 must be actuated by the road travel circuit and the threshing
mechanism must be actuated by relay K14 as pre-conditions for the front
attachment drive. The threshing mechanism ON signal is read in by the
fieldwork computer module (A10) – circuit diagram 7a.
Front attachment ON Note: The front attachment circuit depends on the closed seat contact
switch (Z5).
When actuating the front attachment ON/OFF switch S95, power is
connected as a signal to the fieldwork computer module (A10). In order to
ensure smooth start-up of the front attachment and to avoid strain on the
drive components, the fieldwork computer module (A10) actuates the
solenoid coil (Y88) in a modulated way (PWM) – Front attachment ON.
Note: When half throttle is set in the diesel engine speed adjustment
(S35 – circuit diagram 2), the idle speed rpm value is used when
the front attachment is ON.
Front attachment OFF When actuating the STOP pushbutton (S54) on the multi-function handle
to the first stage, earth is connected as a signal to the fieldwork computer
module (A10). The fieldwork computer module (A10) cuts the power
supply to the solenoid coil (Y88) – Front attachment OFF.
Front attachment quick stop When actuating the STOP pushbutton (S54) on the multi-function handle
to the second stage, the front attachment quick stop solenoid coil Y101 is
actuated via relay K15 in addition to the "Front attachment OFF" function.
The same applies to the actuation of the front attachment ON/OFF switch
S95 in the operating panel. When S95 is actuated beyond the spring-
centred centre position, the voltage signal to the fieldwork computer
module (A10) is interrupted (front attachment OFF) and at the same time,
K15 is actuated (quick stop ON).
The master valve (Y77) is also actuated via the diode PCB (DO) in
parallel with the solenoid coil (Y101) because this function requires that
pressure is built up in the system.