Emergency Switch
In the following examples, an emergency switch (indicated by an “E” in the example figures)
may be included for instantaneous raising of the loading plate in an emergency situation. Such
a switch should preferably have a large, red push knob and be mounted on the vehicle’s dash
board in a place where it is visible and easy to get to. It should have a BREAK contact
connected in series with the Alarm connection as indicated in the examples. The switch needs
only be activated momentarily to instantaneously initiate a complete Raise Plate cycle.
Connection Examples:
UU Example No 1:
Parallel connection in a vehicle with a PARK indicator switched to GND or 12V:
If the vehicle is equipped with a PARK indicating lamp, which is switched on when the
vehicle is in PARK mode (or when handbrake is pulled), then use the provided plug and
connect pin 1 to the positive side of the lamp and pin 3 to the lamp GND terminal.
UUExample No 2:
Series connection in a vehicle with a PARK indicator switched to GND or 12V:
Inserting the Alarm circuit in series with the lamp is often easier but reduces the lamp voltage
by approximately 2V. The lamp circuit can be broken anywhere in the chain from 12V to
GND. Connect pin 2 to the most positive side and pin 3 to the negative side of the break.
UUExample No 3:
In a vehicle WITHOUT a park indicator:
If the towing vehicle is NOT equipped with a PARK switch/indicator, so that a separate
switch (e.g. a small “Micro-Switch”) has to be applied, then this switch should be applied as
shown in Example No. 1 above
UUExample No 4:
Using a proximity switch in a vehicle WITHOUT a park indicator:
The mechanical switch in example No 3 may be replaced by a proximity switch (optional). A
suitable proximity switch may be ordered from Dynatest. A proximity switch of the same type
as used for the System status sensors (described in a later section) may be used (NPN output
type, active low output).
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