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 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. 

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. 

For example, some telehandlers won't start if the the DIP switches have been set for simultaneous forward and reverse signals. 

If the common line is a ground signal, the diode direction in the wire loom will need to be reverse

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 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 with 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 passes on that information 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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