Cedes MiniMax-79 Mode D'emploi page 5

Installation and Operation Manual
Introduction
The infrared light curtain MiniMax consists of an
emitter and a receiver edge, both of which have a
built-in controller. These two active parts are electri-
cally connected directly to the door drive unit of the
elevator and mechanically mounted either to the car
door wings and/or to the slam post. There are vari-
ous types of optional mounting kits available from
CEDES. These kits are optimized to a specific door
drive or car type.
The emitter and the receiver edge build up a grid of
infrared beams, which cover the door entrance to a
height of 1,800 mm (6 feet). The number of beams
covering the entrance area is dependent on the
model in use. The number after the product name
'MiniMax' indicates the maximum number of active
beams. The higher the number, the more beams are
active and therefore smaller objects can be detected.
However, product cost increases with the number of
beams.
The emitter and the receiver require a power supply
of 10 to 30 VDC. The output of the receiver is a
push/pull (PNP/NPN) stage, which is compatible with
loads connected to the positive as well as to negative
power. The output signal of the receiver can be in-
verted by connecting the white input selector wire
either to the positive or to the negative power. No
electrical connection between the emitter and the
receiver is necessary because MiniMax uses an opti-
cal synchronization principle.
To increase the lifetime of the electronic compo-
nents, especially the infrared emitters, the control
unit continuously controls the LED light emission
power according to the distance between the emitter
and the receiver. When the doors are closed, the
emitting power is almost zero. This function also
prevents optical bypassing at the car door sill. This
makes MiniMax the most reliable device on the mar-
ket.
If permanent blocking of a sensor element occurs,
MiniMax recognizes this as a defective or blocked
element. After 45 seconds, this particular sensor
element is blanked and no longer active. This func-
tion allows operation of the device even with partial
damage or blockage due to vandalism. Up to two
non-adjacent sensor elements in the emitter and
receiver edge can be blanked out. As soon as the
blocked element is free again it will be activated im-
mediately.
Note: This function is not available in the USA
and in Canada.
© CEDES I V 1.7
If a power supply of 10 to 30 VDC is not available, a
state-of-the art Power Supply/Relay Module available
from CEDES may be used. This power supply device
accepts any voltage available from 20 to 265 VAC or
DC without any special wiring or adjustments. If DC
voltage is used, the polarity of terminals P and N is
irrelevant. This product is especially useful in mod-
ernization applications where the supply voltage is
not standardized or known.
A specific feature of MiniMax is the reduction of light
emission power in the infrared LED's. This unique
feature was invented and patented by CEDES in
1990 and increases LED lifetime almost to infinity.
However, this feature works properly only if the
sequence of closing and opening the door is correct.
When the doors are closing, the light emission power
of the LED's decreases. Once the doors are closed,
MiniMax turns off the angled beams. Only straight
beams are active until the doors reopen by more
than approximately 50 cm. This functionality has to
be considered when MiniMax is under test in a
laboratory where the closing and opening cycle are
not followed.
Features of MiniMax
 Criss-cross beams until full closure for best-in-
class detection capability
 Designed lifetime of more than 20 years due to
gold plated contacts
-
power reduced light output during door close cy-
-
cle
special cable that withstands more than 20 mil-
-
lion door openings (if properly installed)
 Robust and extremely compact design
 Plug'n-play edges with integrated controller
 No link connection between emitter and receiver
due to optical synchronization principle
 Suitable for side or center opening doors
 Suitable for metal or glass doors
 Suitable for dynamic or static installation
 Blanking of up to two defective opto elements (not
adjacent) after 45 seconds (function not available
in US and Canadian versions)
 Mechanically compatible to cegard/Max
www.cedes.com
MiniMax-79/159
TM
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