Cedes cegard/Lift LX/LY Installations- Und Bedienungsanleitung Seite 6

cegard/Lift LX/LY
5.2.6 Safety circuit 1 and 2
- See also Chapter 7: K28-K29 / K30-K31
One of these two contacts must be looped into the elevator
safety circuit so that interruption of the light curtain or a
malfunction will lead to a shutdown of the elevator.
External power contactors with positive-action contact
sets can also be connected to a safety circuit output, and
a single contact should be fed back from each of these
(Chapter 8.3).
These result in the following advantages:
• Switching of higher outputs
• Avoidance of internal safety contact over-loading
• More secure circuits can be realized
5.2.7 Latch output (Latch_Out (Riegel_Out))
- See also Chapter 7: K26-K27
A single-phase latch solenoid / motor can be connected
to the K26/K27 connections. Connection of Latch_Out
(Riegel_Out) (in accordance with Chapter 8) is essential
with the cegard/Lift for safety reasons, as it effectively
prevents the elevator leaving a floor and it also avoids a
dangerous step into the elevator cabin from being created
in the event of an interruption of the light curtain.
How is a step prevented? It is possible for the elevator
to "slip" in the unlocking zone if an emergency stop is
activated by an interruption of the light curtain shortly before
reaching this zone. In such an instance, the cegard/Lift
keeps the K26/K27 contacts closed and the door remains
locked, preventing any dangerous step. However, should
this condition exist for a longer period it could lead to the
destruction of the latch solenoid or motor. A maximum
latch holding time of 10 min is defined precisely for this
reason. Latch_Out (Riegel_Out) is adapted to Latch_In
(Riegel_In) after this time period expires. However, the
elevator remains in the emergency stop status.
IMPORTANT NOTICE
The elevator can only be released from its
emergency stop status via an internal call signal
(the reset button) from within the elevator car
itself.
When the emergency stop status has been exited via a
Reset, the cegard/Lift offers three options (Internal Jumper,
see Chapter 8.6):
1. Setting:
Latch_Out (Riegel_Out) remains active for a
maximum of 10 min.
The elevator has to travel to another floor before it can
proceed to the selected floor.
2. Latch_Out (Riegel_Out) drops out with a delay of
2.5 s. Latch_Out (Riegel_Out) succeeds Latch_In if
Latch_In (Riegel_In) is HIGH during these 2.5 s.
3. As in 2. but with a 10 s delay.
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The 2.5 s and 10 s settings can only be selected for
elevators equipped with relevelling; otherwise a dangerous
step could result.
Two cegard/Lift versions are available to provide the
Latch_Out (Riegel_Out) output for different elevator
types:
Version LX (with latch contactor)
A power contactor is connected in series to the Latch_
Out (Riegel_Out) output in this version. This can directly
actuate three-phase latch motors (see also Chapter 7.1).
Version LY (with rectifier)
A rectifier module is connected in series to the Latch_Out
(Riegel_Out) output in this version. This can directly
actuate a D.C. latch solenoid (from 180 VDC) (see also
Chapter 7.2).
In order to ensure the Latch control operates properly, the
use of a contactor or rectifier is recommended. The Latch
should never be connected directly via the K26 and K27
contacts as this can interfere with the internal relay.
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