411, 611 & 325 OCU
User Manual
13
9M02-8999-A001-EN
Each function pushbutton or rocker switch may have one or more steps as described above, these can operate
different functions. Typically, on a two-step rocker the first step controls a direction or function and the second
step controls a speed increment, although it is possible with a step-less drive to use the second step as
accelerate, the first step as hold speed, and the released state as decelerate.
Additionally for a high safety function it is possible to use both the direction and speed step as a CAT3 PLd input.
Any function is normally active only if the respective pushbutton is pressed. When the pushbutton is released, the
function automatically stops, however latched MCU functions may be defined for functions such as Lights that
need to be maintained in the absence of an online OCU.
The Start push button is for System Start / Mainline reset and / or HORN depending on machine wiring.
At startup the pushbuttons are checked for the correct off state.
These OCUs use off the shelf AA Alkaline batteries that will typically provide around 95 hours of continuous
operation, the batteries are accessed via a sealed cover retained by two screws as shown below.
Figure 2 OCU, rear view
1. Sealed Battery Cover
2. Battery Access Screws
3. Loop for belt clip
