JLG 80SL, Service Maintenance Manual

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SECTION 5 - JLG CONTROL SYSTEM
3121325 – JLG Lift – 5-9
Relay K3
1. Energized when there is a trigger output at 3.
2. The analogue input signal 4 passes through a set of
N.O. contacts to produce an analogue output on 11.
3. The pump input signal 10 or lower input signal 9
passes through a set of N.O. contacts. This ouptu
signal maintains the Trigger input signal 2 which
energizes relay K1.
5.6 LIMIT SWITCH & SENSOR OPERATION
NOTE: Refer to Figure 1-1., Limit Switch Locations for loca-
tions of limit switches.
Height Limit Switches
Platform Stowed/Jacks Retract Limit Switch ( S Platform
Down):
This limit switch is mounted on the chassis and is acti-
vated by a cam mounted on the pivot of the scissor pack.
• When the platform is fully lowered, this switch is closed
and permits a platform lower signal (from the Complex
Board) to enable the NIVOLUX board to retract the out-
riggers.
• When this switch is activated, the outriggers can not be
retracted.
High Drive Speed Cutout Limit Switch (S 2.5m):
This limit switch is mounted on the chassis and is acti-
vated by a cam mounted on the pivot of the scissor pack .
When the platform is within approximately 0.5m (1.6 ft) of
the fully lowered position, this switch is closed and 2 x 24V
outputs are available.
• The Control System (Complex Board) uses one of
these signals to enable fast drive and bypass the tilt
switch lift cutout feature. The Self-Leveling System
(NIVOLUX Board) also uses this signal to enable the
outrigger valve outputs.
• The second bypasses the oscillating axle sensing
switches.
• When this switch is activated, the drive speed is limited
to slow speed. The Self-Leveling system valve outputs
are cut and the tilt switch circuit controls the lift function
which is cut out.
Maximum Drive Height/Maximum Height without Outrig-
gers Limit Switch (S Drive Height):
This limit switch is mounted on the chassis and is acti-
vated by a cam mounted on the pivot of the scissor pack.
When the platform is below the maximum permitted drive
height, this switch is closed and 24V output is available.
• The Control System (Complex Board) uses this signal
to enable the drive function.
• When this switch is activated, the drive function is cut.
When elevating without outriggers deployed, this
switch will also prevent lifting above the drive cutout
height.
Maximum Height Limit Switch (S Max Height):
This limit switch is mounted on the chassis and is acti-
vated by a cam mounted on the pivot of the scissor pack.
Table 5-9. Connector CON1
1 24V Supply
2 Trigger Switch Input
3 Trigger Switch Output
4 Analog Signal Input
5 Start Input
6 Start Output
7 Drive Input
8 Drive Output
9 Lower Signal Input
10 Pump Signal Output
11 Analogue Signal Output
12 Ground
Table 5-10. Trigger Control Circuit Board
INPUT
T
rig
ger Switch
Pu
pm
o
r L
ow
er
Start Drive Spare Spare
OUTPUT
J2/2 J2/4 J2/5 J2/7 J2/9 J2/1
1
Trigger Switch
J2/3
1 (1) (1)
Start
J2/6
0 1
Drive
J2/8
1 1
Spare
J1/10
1 1 (1) (1)
Board Power
24V (Vs) J2/1
Ground J2/12
(1) Trigger Input = Pump/Lower input within 6 seconds