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cegard/Max-NT
Important
Before connecting electrical power, please ensure that
the power is switch to an off state in accordance with
local regulations (i.e. lockout / tagout). You must ensure
that system cannot inadvertently start up while you are
connecting the devices.
4.4.1. Power supply
Connect power to terminals as shown in Figure 7.
N
: AC neutral; plus or minus for DC
P
: AC Hot; plus or minus for DC
: Protective ground
The incoming power must be fused ≤ 10 A current.
The label on the cegard/Max-NT controller provides ter-
minal information for the electrical connections as well
as LED status information and DIP switch and potenti-
ometer settings.
4.4.2. Transmitter and Receiver Connections
The white transmitter connector must be plugged into
the white marked plug. The blue receiver connector
must be plugged into the blue marked plug.
4.4.3. Fire recall
Phase I:
AC Hot, plus or minus for DC
Common I:
AC neutral, plus or minus for DC
Phase II:
AC Hot, plus or minus for DC
Common II:
AC neutral, plus or minus for DC
Fire Recall Phase I
If the input labeled "Fire Recall Phase I" is activated, the
light curtain is disabled, and nudging is enabled. The
nudging buzzer sounds and remains on during door
close and until the car arrives at the designated landing.
The buzzer remains on for 15 seconds after the "Fire
Recall Phase I" input is deactivated.
Fire Recall Phase II
If the input labeled "Fire Recall Phase II" is activated,
the light curtain output is disabled. The nudging function
works independent of "Fire Recall Phase II". Operation
of the doors is taken over by people (i.e. firemen) elimi-
nating the need for automatic reopening and to guard
against false opening caused by smoke.
8
Installation and Operation Manual
Important
This cegard/Max-NT light curtain is not a safety rated
device. A broken wire at the "Fire Recall Phase I" or "Fire
Recall Phase II" terminal or the use of faulty electrical or
electronic equipment may prevent the elevator from en-
tering into the corresponding Fire Recall state. In this
case, the corresponding "Fire Recall" input signal will
not be recognized and doors will not close as required
by code. The elevator integrator / contractor is respon-
sible for ensuring that this condition cannot be allowed
to occur.
4.4.4. Output relay
The light curtain Normally Open contact of the output re-
lay is energized when the detection beams are clear of
any obstruction and the transmitter and receiver are
aligned. The Normally Open contact of the output relay
is deenergized during a beam obstruction, a fault condi-
tion or with no power applied.
Important
The contact rating of the output relay is maximum 250
VAC / 8 A, 125 VDC / 0.5 A, 30 VDC / 8 A, and minimum
5 VDC / 10 mA. Make sure that you use a pilot relay
when switching higher voltage DC loads greater than
0.5 A.
Figure 8: Relay state when protective field is clear
Figure 9: Relay state when protective field is obstructed
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