Mega MAC - Cab Control System DiSCS 1.5

MAC/MTT-OPS-1
26 FEB 2019
SECTION 2
System Description
2-13
CAB CONTROL SYSTEM DISCS® 1.5
This system is designated as a Digital Spray Control
System (DiSCS). The most recent version is
Generation 1.5. The system is comprised of control
boxes, controllers, sensors, and cabling. It is a
multi-function control system with a separate
joystick box that is mounted in the vehicle cab.
These two boxes control all water tank functions.
The cab controls require 24 VDC vehicle power to
operate.
Abbreviations and Definitions
AUX1 Auxiliary or additional optional
function
BFV Butterfly Valve
DMPBAR Dump bar for heavy spray of water
close to ground. Can be either a
gravity or pressure dump bar
(pressure dump bar requires water
pump activation to operate).
DRAIN Drain (gravity or pressure) for
evacuation of water from tank,
mounted typically at the rear of the
tank.
KPH Kilometers per hour
LT VSS Left Vertical Side Spray
LTC Left Center Spray Head
LTR Left Rear Outer Spray Head
MPH Mile per hour
RAMP Ramping Control feature. Rate of
increase or decrease in speed of
water flow during PUMP
engagement or disengagement
RT VSS Right Vertical Side Spray
RTC Right Center Spray Head
RTR Right Rear Outer Spray Head
The master switch box control functions operate
follows:
Master
Switch Box
Joystick Box
Symbol Name Function
POWER
Provides power for all cab control
functions.
PUMP
Routes vehicle hydraulic system
pressure and flow to the water
pump hydraulic drive motor.
INTMNT
Controls activation of either the
time-based intermittent mode or
the distance-based AUTO mode.
See the extended description of
“INTMNT” for details.
LIGHTS Provides power to work lights.
F1
Function is dependent on the
intermittent or AUTO mode
settings. See extended
description.
F2
Function is dependent on the
intermittent or AUTO mode
settings. See extended
description.
PAUSE Pauses all system functions.
WATER
LEVEL
Indicates tank water level. From
top to bottom, respectively, the
symbols indicate a water level of
FULL, 3/4, 1/2, 1/4, and EMPTY.
AUTO
Controls activation of GPS AUTO
mode. See extended description
for more details.
AUX 1 Reserved for user-added option.
AUX 2
Controls activation of suction load
station or multi water cannons.
HOSE
Controls activation of hose reel
function ONLY.