Electrical Access and Exit Control Systems in .NET

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Electrical Access and Exit Control Systems
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Automatic penalty. A penalty time of approximately 5 seconds is incurred if an incorrect key is depressed during the code entry or if two or more keys are pressed simultaneously. This feature defeats random button manipulation. Code bypass. There is a provision within the access control unit for the connection of an external (remote) switch or pushbutton to operate the lock via the programmer unit without the use of the entry keyboard. This is normally sited within the protected access area and used for giving access to personnel or visitors who do not possess the code combination but for whom access is warranted and authorized by the customer. Memory protection. The Memorilok keeps the code combination stored and undamaged in case of a main power failure. This is due to the constantly charged nickel cadmium battery contained within the unit.
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Duress/error alarm. The duress/error alarm option is available as an integral part of the Memorilok unit and, if desired by the customer, must be ordered as original equipment. The duress alarm is activated by depressing a factory-fixed last digit (from 0 to 9) instead of the last digit of the selected code combination. If entry is made under duress, the first three digits of the programmed code combination plus the predetermined last digit the Duress Digit are entered on the keyboard. This automatically operates a set of Form C (Changeover) dry contacts that, in turn, triggers any desired alarm system: audible, silent, remote, or local.
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The error alarm circuit will react on any number of selected unsuccessful attempts at entry. As soon as the predetermined number of incorrect attempts (from one to eight) have been made, the alarm is activated, warning that the system is being tampered with.
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Flush mounting. To flush mount the programmer, keyboard, or even the battery standby, an oversized front panel is used. The panels, 8 9 inches, are affixed to the standard front panels to conceal the rough opening around the Memorilok unit.
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The optional card reader fits into the front of the keyboard panel. It provides higher levels of security integrity because the coded card must be used by the individual seeking entry. It must be entered into the Memorilok before the code combination will be accepted by the electronic memory circuit.
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Wiring instructions. Wiring details are in Fig. 19.71. The following notes apply,
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These connections are not used unless the remote entry/exit is required. Use the open switch.
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Nineteen
FOLLOW OPERATING INSTRUCTIONS TO CODE BYPASS SWITCH
SEE NOTE #1,4
PROGRAMMER
DC EXIT AC
MAIN POWER 120 VAC
NC DC LOCK COM NO NC AC LOCK COM NO A B C D + 24V 12V 24V
D.C TO THE LOCK (OR DEVICE)
SEE NOTE #3
COM NO NC
*MOVE WIRES TO SELECT VOLTAGES
KEYBOARD TERMINAL BLOCK A B TO KEYBOARD TERMINAL BLOCK C D + LED
A.C TO THE LOCK (OR DEVICE)
SEE NOTE #3
COM NO
(OPTIONAL WIRING)
LED NC COM NO RS
DURESS/ERROR ALARM CONTACTS
SEE NOTE #2
COM NO
ALARM RESET SWITCH (R-S) SEE NOTE #5
Figure 19.71 Memorilok wiring instructions (refer to text for notes). (Alarm Lock Corporation)
All contacts are shown (NO and NC) without the lock being energized and without being in the alarmed state. On installations where there is a long wire run between the programmer and the lock or other device being operated, carefully compute the minimum requirements of the lock or device and the voltage drop that will occur in the wire. Code bypass switch requires a momentary switch with normally open (NO) switch contacts. The alarm Reset Switch (R-S) requires a momentary switch with normal switch contacts. This should be wired between terminal 2 of the exit and terminal R-S indicated on the diagram as blacked out block on the programmer wiring hookup. Use this only for duress/error entry.
Programming the Memorilok. To program the Memorilok, turn the programmer key to the on position. Enter the desired four-digit code combination on the keyboard. A green LED indicator light glows to indicate that the code is properly programmed into the memory system. Return the programmer key to the off position. Reinsert the code to test the unit for proper operation. Now the green LED light indicates acceptance of the code combination and supply of power to the lock or other device used.
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