Dokument-No.:2013366
Version a
page
5
Creation date: 28.11.2007
3.
Control unit and electrical function
3.1.
General
The control unit processes signals coming from outside via terminal strips.
It controls the commands for operation of the wedge, operates the solenoid valves of the hydraulic
unit and offers a variety of indications and control elements.
3.2.
Operation controls and indicators
3.2.1. Inputs
Control device “stop”
After activation of a control switch “stop”, the Wedge stops immediately. A renewed movement of
the Wedge has to be started either by using the control switch “lower” or “raise”.
If the function “automatic raise” is active, the Wedge will automatically raise into its blocking
position after the pre-adjusted time T10 has expired.
Control device “lower”
The Wedge barrier moves into the completely lowered position after activation of the control switch
“lower“.
If the command “lower” is given during operation of the Wedge, it will stop and will only lower after
the pre-adjusted reversal time T2 has expired.
Control device “raise”
After activation of the control switch “raise” the Wedge barrier moves into the completely raised
position.
If the command “raise” is given during the lowering movement of the wedge, it will automatically
stop and will move into the raised position after the pre-adjusted T2 time has expired.
Control device “emergency raise”
The command “emergency raise” moves the Wedge barrier immediately into the completely raised
position. If the command is given during the lowering movement of the wedge, the direction of
movement reverses immediately.
The „emergency raise“-command is a priority command and overrides the safety function of the
induction loops, light barriers and the command for fire-brigade.
As long as the control switch is operated, no movement of the Wedge is possible.
The „emergency raise“-command is permitted even in case of a malfunction (oil temperature too
high or oil level too low). Afterwards no further movements are possible with activated input
“emergency raise”.
The optional “speed kit” with accumulator will move the blocking segment into its upright position
with increased speed.
Fire alarm system / fire brigade
The fire alarm system causes an automatic lowering of the Wedge, if the contact is opened by a
control device. Therefore this contact always must be closed.
The Wedge cannot be raised as long as the contact is open, neither automatically nor by control
switches. To go back to normal function the contact has to be closed again.
The “emergency raise”-function will override the fire alarm system.
