Gen3 - Installation - Generic Electrical Drive Direction Signals
The drive direction signals inform the Gen3 LMS that the machine is in drive and to
activate a camera display based on the direction selected.
The following sections serve to illustrate common electrical connections from the Gen 3 safety system to the existing electronics in the machine. The purpose of this Tech Doc is not to provide a wiring setup for any specific telehandler, but rather to provide generic guidance for customers when trying to troubleshoot electrical drive direction issues.
The drive direction is usually controlled via a column switch attached to the steering wheel.
Typically the column switch is a basic 3 pole switch design with 3 lines: common, forward
and reverse. When the machine is not in gear or is in neutral, none of the lines are
connected. When in forward gear the common line is connected to the forward line and
when in reverse gear, the common line is connected to the reverse line. The big exception to this wiring strategy is when the machine uses a CAN bus. Some of the latest machines use CAN buses to transfer machine control functions. Therefore, when direct connections to the joystick switches is not possible, EQSS uses a CAN I/O module as a bridge between the machine's CAN bus and the Gen3 system CCIM module.
CCIM Module I/O port
Drive direction sensing is implemented within the CCIM module. Control signal detection for any particular telehandler is set up in the EQSS factory (just before shipping). It is a machine specific configuration that is accomplished via DIP switch banks. Customers/users should never change the DIP switch settings unless specifically directed by EQSS personnel. The DIP switch settings are able to switch between active high and active low machine signals. This enables the EQSS Gen3 system to be adaptable to all makes and models of telehandler machines.
If the common line is a ground signal, the diode direction in
the wire loom will need to be reversed
The other wires on the machine input connector are for the
override switch and may need to be extended
A 4-Pin connector with 4 bare wires will have been supplied with the generic kit (called the machine
input connector). Splice the Black wire going into the machine forward signal and splice the Blue wire going into the machine reverse signal.
Some of the newer cabin designs have the direction switch attached to the joystick, this
should also be a basic 3 pole switch design and can be connected in the same way.
Some direction switches are integrated with a processor and have a CAN output. The Gen 3
LMS does not support direct connection into the machine's CAN bus. The wires from the
machine input connector will need to be soldered directly onto the input pins to the switch's
PCB, if the PCB is accessible.
However, there are a few select models of Manitou machines where the Gen 3 monitors forward and reverse via the Manitou CAN bus. This capability is implemented via an EQSS CAN I/O module. The EQSS CAN I/O module connects to the Manitou CAN bus and waits to be given Manitou CAN frames with forward and reverse information. The CAN I/O module then activates control signals to the EQSS Gen 3 system.
Some machines have a direction switch on both the column
switch and the joystick. The Gen3 LMS DIY kit does not
support multiple direction switches, contact EQSS for a
solution.
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