Q-00001: How can one perform an emergency opening (during power failure) with the ematic Encoder System ?
A: The Sematic Encoder System controller operates with a 32Vac supply to input terminals 7 and 8. However, with a power supply failure (emergency operation), it is possible to energise the controller with a supply from 24Vdc to 36 Vdc at the same input terminals (7- and 8+), by linking the transformer output to a relay switch, the controller will then work as normal with all its functions. If the DC battery is fitted in the main lift controller, then a suitable cable must be used to avoid excessive voltage drop. As an alternative, sematicâ can supply the EOD (Emergency Opening Device), for installation with the car door operator. This system includes a battery and control logic to perform the door opening at a defined floor.
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Q-00002: How does the Sematic Encoder System comply to EN81:1998 as far as kinetic energy is concerned?
A: EN81:1998 par. 7.5.2.1.1.2 specifies a maximum kinetic energy (Ek) of 10J. With the standard speed profiles the maximum closing speed parameter is set to the value of 20. This speed has been tested with a heavy panel to be within the Ek limits. The maximum closing speed can be directly increased up to a value of 25 (max 45 with a user password). In this last case it is the responsibility of the lift tester to ensure that the Ek is still below the maximum allowed level. Since the Ek depends on both moving masses and speed, it can be calculated (with difficulty) or measured (easily) with a specific tool (see note at par. 8.7.2.1.1.2 of the standard).
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Q-00003: What about the EN81:1998 par. 8.11.3 requirements (F >= 50N to open car doors when the car is moving)?
A: When the door is closed, the motor is continuously powered with the correct current level that requires a minimum of 130-150 N of force applied to the car door to move it from the closed position.
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Q-00004: Is it possible to use the Sematic Encoder System controller in a lift where landing doors of different width are fitted?
A: Yes. Check the EPROM release: for versions after 16/03/1999 a specific parameter can be set to use the KB controller input as a signal to identify a different landing door width, two width dimensions in the same lift are therefore possible. The controller stores two different run lengths and applies the appropriate at each floor.
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Q-00005: Is there a specific setting for glass panelled lift doors?
A: Check the EPROM release: for versions after 16/03/1999 a specific flag can be set to limit the maximum opening speed at a parameter value of 30. This helps reducing the finger trapping risks and can be used in conjunction with other safety measures (i.e. friction coefficient reduction etc.).
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Q-00008: What does EMC means and how is it related to the Sematic Encoder System?
A: EMC is the acronym for "Electro Magnetic Compatibility". It refers to the capability of electrical and electronic appliances operating correctly in an electromagnetic environment, and the minimising of electromagnetic noise emissions. A European Directive (89/336/EEC) and two specific lift-related harmonized European standards (EN12015 and EN12016) set the rules. The complete Sematic Encoder System (car door operator with motor, motor drive and power supply transformer) has been tested and found in compliance with the above-mentioned EN standards; the relevant Declaration of Conformity is issued by sematic with each order.
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Q-00009: How can the Sematic Encoder System perform a NON-LATCHING BEHAVIOUR?
A: A momentary door-open or door-close signal is sufficient to operate the door's movement. The signal is stored by the Sematic Encoder System controller, which completes the requested command even if the signal is removed. Naturally, during the closing run, it is possible to reverse the movement by activating the door-open signal. It is possible to set the Sematic Encoder Controller so that it checks for the continuous presence of the signals coming from the main lift controller. The Encoder controller detects any signal failure exceeding 400ms. The relevant behaviour can be chosen between slow-speed movement and immediate stop.
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