Planningthesystem
6 SA3-SInstallation&CommissioningManual
4 Planningthesystem
In order to use the SA3-S safety system together with a lift system, the following requirements must be satised:
1. The lift control system must make available a signal that always becomes inactive when the car
is not to be moved ("inmotion" signal). This signal must be inactive on each stop. Level: 0V (car is
moving) / 24V or high impedance (car is not moving). The signal is needed in order to test the solenoids
at the overspeed governor and to allow that the magnetic coil drops with closed doors (quiescent state
of the lift).
2. The product must be supplied with power via a 24Vemergencypowerdevice.
Reason: If power fails during travel, the solenoids must remain energised until the car stops, as the
safety gear will otherwise be actuated. This delay is taken into account in the device, but can only take
effect if the power supply is ensured for several seconds following power failure. Required is 24V/1A
for about 10 sec. In addition, an UPS is needed in order to energise the solenoid during an emergency
rescue so that the car can be moved. The emergency power supply must be designed accordingly.
3. An override input ensures that the car can also be moved in the event of a power failure so that per-
sons can be freed.
In the override state, the solenoid energises and the safety circuit relay opens. Level: 0V (override) /
high impedance (normal operation). For override, a separate switch must be wired in the control cabi-
net. It is to be labelled with "Ovrd. SA3-S".
4. The safetygear that is to be used in combination with the SA3-S must satisfy the requirements of EN
81-1:1998 + A3:2009 or EN81-2:1998 + A3:2009
5. The carapron must satisfy the requirements of EN 81-1:1998 + A3:2009 point 8.4.
An apron acc. to EN 81-21 is permissible only if the car apron satises the requirements specied in
EN 81-1, section 8.4 over the entire shaft upon leaving the lowest oor. If this cannot be ensured, the
calculation of the permissible upward stopping distance (see chapter "Upward stopping distance") can
only take into account the vertical part of the car below the car threshold for the apron length.
6. A formula must be used to theoretically verify that the car achieves the stoppingdistance specied in
the standard. The "upward" and "downward" cases are to be calculated separately. The following data
are necessary for this purpose:
› Maximum length of the door zones in the up and down directions (normally 200mm in both
directions)
› Maximum reaction path of safety gear and overspeed governor (the path of the car from the
time the safety cable is blocked until the safety gear reaches its guaranteed braking decelera-
tion) in both directions
› Minimum braking deceleration of the safety gear in both directions
› Internal passage height to the car interior (for calculating the maximum downward stopping
distance)
› Length of the apron below the car (for calculating the maximum upward stopping distance)
› Mass of empty car, cable and counterweight (for calculating the maximum possible upward
acceleration)
The product may only be used if the required stopping distances can be achieved. For some parame-
ters, standard values may be used.
7. The safetycircuit of the lift system must be modied according to the specications. In the standard
device, the safety circuit voltage is 230V / 50Hz. Other voltages are possible on request.
8. The PowerGood input signals a powerfailure at the control system. Level: 24V: current present / 0V or
high impedance: power failure. Ideally, this input is supplied by the power supply of the control system.
9. If the system is equipped with the "approach with open doors" function, the two doorzonesignals
must be wired. These signals must also be monitored by an external safety circuit bypass control. Level:
24V (door zone) / 0V or high impedance (outside of the door zone).
10. To reset the product in the A3 case or after an error, a button ("reset") can be wired in the control
cabinet. Level: 24V (reset) / 0V or high impedance (normal operation). The button is to be labelled with
"Reset SA3-S". Alternatively, the SA3-S safety device can be reset with the aid of a magnet below the
display.
11. The "error" output of the product can be wired with an error lamp (24V, max. 0.7mA) or with the control
system. This output is for information only and is not a safety function. The error lamp is not necessary if
the device display can be viewed.If the error output is read by the controller, the controller must not stop
the system in case of an error.
