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cegard/Smart
Time
t
Power-up time
1
t
Typ. reaction time of the cegard/Smart control unit output caused by an object entering
2
the detection field of the cegard/Smart light curtain.
Typ. release time of the cegard/Smart control unit output after clearance of the detection
t
3
field of the cegard/Smart light curtain.
Table 1:
Descriptions of the times provided in Figure 10
5.8
Control unit output
The control unit provides a relay output with Normally-Open (NO), Normally-Closed (NC) and Common (COM).
The contact rating of the cegard/Smart control unit output relay is provided in Chapter 5.14.
Normally Open (NO-COM)
Relay state
Normally Closed (NC-COM)
Relay state
Figure 11:
Control unit output logic
The use of some type of surge suppression to help protect and extend the operating life of the outputs is recommended
when switching inductive load devices, such as motors or solenoids. The potentially high current surges that are created
when switching inductive load devices, requires this extra protection. By adding a suppression device directly across the
coil of an inductive device, the life of the outputs is prolonged.
CAUTION
The system response time can increase significantly, when surge suppression diodes are used.
Never install suppressors directly across the contacts of a connected relay.
The relay output of a cegard/Smart control unit is not monitored. A stuck at high of a welded relay contact of a cegard/
Smart control unit may lead to a dangerous situation. To ensure detection of a stuck relay, the elevator control system
should monitor that a change of state has occurred after a pre-determined number of door motions.
5.9
Startup cegard/Smart control unit
NOTE:
For safety instructions - please refer to Chapter 5.3.
1. Make sure that the cegard/Smart light curtain (emitter and receiver) are connected to the control unit.
2. Make sure that the cegard/Smart control unit is connected to the elevator door controller via the relay output.
3. Make sure that cegard/Smart control unit is connected to the power supply.
4. Switch on the power supply. The POWER-LED at the cegard/Smart control unit will change from OFF to ON.
5. After the control unit is started up the green indicator LED's on the board will show you the status of the system:
Power LED on:
Power supply is OK.
Tx LED on:
Control unit has connection to the emitter of the light curtain.
Rx LED on:
Control unit has connection to the receiver of the light curtain.
Out LED on:
Indicates that the optical path between emitter and receiver is not interrupted.
Gateway LED on:
Control unit has connection to the Gateway of the system.
6. Test if the LED "OUT" changes state by interrupting the protective field of the cegard/Smart light curtain. In addition
to the LED change of state, the installer must check to ensure that the door reverses on interruption.
7. For EN 81-20: Use a none transparent test object with a diameter stated in the code: Ø 50 mm. The
cegard/Smart light curtain must signal object detected at all times during this test (from the bottom to the top of the
protective field).
8
Closed
Open
Closed
Open
English
Value
< 5 s
<130 ms
< 420 ms
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