scrambled keypad is specified, the designer will
specify the reduced viewing angle feature. The
designer will specify whether visual and audible
prompts are needed.
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Entry control keypads shall use a unique combination of alphanumeric and
other symbols as an identifier. Keypads shall contain an integral
alphanumeric/special symbols keyboard with symbols arranged in [ascending
ASCII code ordinal sequence] [random scrambled order]. Communications
protocol shall be compatible with the local processor.
2.8.2.1
Keypad Display
Keypads shall include an LED or other type of visual indicator display and
provide [visual] [visual and audible] status indications and user prompts.
The display shall indicate power on/off, and whether user passage requests
have been accepted or rejected. The design of the keypad display or keypad
enclosure shall limit the maximum horizontal and vertical viewing angles of
the keypad. The maximum horizontal viewing angle shall be plus and minus 5
degrees or less off a vertical plane perpendicular to the plane of the face
of the keypad display. The maximum vertical viewing angle shall be plus
and minus 15 degrees or less off a horizontal plane perpendicular to the
plane of the face of the keypad display.
2.8.2.2
Keypad Response Time
The keypad shall respond to passage requests by generating a signal to the
local processor. The response time shall be 800 milliseconds or less from
the time the last alphanumeric symbol is entered until a response signal is
generated.
2.8.2.3
Keypad Power
The keypad shall be powered from the source as shown and shall not
dissipate more than 150 Watts.
2.8.2.4
Keypad Mounting Method
Keypads shall be suitable for surface, semi-flush, pedestal, or
weatherproof mounting as required.
2.8.2.5
Keypad Duress Codes
Keypads shall provide a means for users to indicate a duress situation by
entering a special code.
2.8.3
Card Readers With Integral Keypad
2.8.3.1
Wiegand
The Wiegand card reader, as specified in paragraph Card Readers And
Credential Cards and paragraph Wiegand Wire Effect, shall be equipped with
integral keypads as specified in paragraph Keypads.
2.8.3.2
Smart Card
The smart card reader, as specified in paragraphs "Card Readers And
Credential Cards" and "Smart Card", shall be equipped with integral keypads
SECTION 13720A
Page 72
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