7.4 Locking bolt
7.4.1 Installation and electrical configuration of the locking mechanism
The locking bolt is used to block the entrance door. According to the description in point 6.2, the lock terminals
should be connected to the PBX outputs described as R+ and R -. Remember to correctly polarize the lock (R- is
ground).
The next step is to configure the lock operation. 8 parameters are used for this purpose: 4 for the voltage
applied to the lock, 3 for the control times and one for the operating frequency. These pa rameters are defined in
Table 12. Each lock type should be configured individually.
Description of technical parameters:
•
PWM period of the lock – time of a single period of the PWM signal controlling the lock, given in [16 µs].
The operating frequency is
Too long period of time can result in incorrect or noisy operation of the
electromagnetic jumper or lock (longer period is less frequency). By default, the lock operates at a frequency
of 1kHz.
•
Filling PWM at idle – power with which the lock is controlled during the “closing” phase. In case of a
standard locking, the filling will be 0. In case of a reverse locking, the filling must be set so as to keep the
lock in closed state. The electromagnetic jumpers in this condition should be controlled with the max imum
allowable power.
•
Filling PWM at first phase – determines the voltage that will be applied to the lock connector in the first
phase of control. In case of a standard locking it should be a strong impulse. In case of reversible locking and
electromagnetic jumper it is necessary to enter 0.
•
Filling PWM at second phase – parameter defining the filling in “support” phase after opening the door. In
case of a standard locking system, this filling may be smaller than in the first phase, because less energy is
needed to maintain the opening state than when opening. In case of magnetic jumper and reverse lock, the
filling will be 0.
•
Filling PWM at third phase – transition phase between the second phase and the idle state. Reverse lock
should be controlled by a strong signal. The jumper should be driven by a signal half as weaker than at idle.
•
First phase time of the lock [10ms] – time for which the lock will be controlled by a higher voltage.
Filling PWM in a simplified way determines what average voltage will be given to the lock. The voltage is
calculated from the formula
where Vcc is the cassette supply voltage (to be measured
between terminals R- and DC+). Filling PWM is defined as
(see Fig. 5.). Figures 2, 3, 4
show examples of lock and jumper control. Indi cated fillings are for illustrative purposes only. They should be
scaled to the specific device to be used.
Correct configuration of locking extends its lifetime and reduces energy consumption (especially in case of
reversible locking and electromagnetic jumpers). Examples of settings are shown in Table 22). After configuring
the lock control, you can proceed to “connecting” the locking to system events (see point 8).
Lock parameters are defined by parameters listed in Table 23. Changes to the settings are made in program A-8
(see 4.9).
Summary of Contents for KDC1905
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