HID ProxPro Installation Guide - Manual (Page 9)

ProxPro
®
Installation Guide Part No. 5355-900, Rev N.1
Example without parity:
AAAA BBBB CCCC DDDD ..... KKKK
AAAA = The first key entered
BBBB = Second key entered
KKKK = Eleventh key entered (the maximum)
Example with parity:
A message that has a fixed number of key entries set to 4 and the parity option included.
P AAAA BBBB CCCC DDDD P
A - First key entered
B - Second key entered
C - Third key entered
D - Fourth key entered
P - Parity Bits
The whole message is similar to the "Standard 26 Bit Wiegand" formatted message. The format
consists of two parity bits at the opposite ends, one odd and the other even. Each parity bit covering
exactly one-half of the message.
P X X X X X X X X . . . . . . X X X X X X X X P
E X X X X X X X X . . .
. . . X X X X X X X X P
5.5 Keypad Scanning 2 of 7
This mode requires a separate cable to be supplied that connects to the Keypad board, inside the
ProxPro, to the Host via P2. P2 is a 7 position terminal strip. Switch 1-4 (SW1-4) should be switched to
the “off” position. The reader will then NOT process the keypad data, and it will be decoded by the host
in 2 of 7 format.
The keypad has a matrix of contacts corresponding with the matrix of keys. The contact outputs are
wired to the seven terminals of P2. The seven terminals are called P2-1 thru P2-7 and provide the 2 of
7 decode of the buttons. When a key is pressed, the button closes two contacts that pull 2 lines to
ground. This results of the key entries are in the table below. The reader and the host that is scanning
the keypad will require a common signal ground. The connection is to be made on either pin 2 (power
supply ground) or 5 (Data Return) of TB1 of the ProxPro.
This method of interfacing the keypad requires additional processing by the host. These include the de-
bouncing of the keys, decoding of the keypad, and timing between key entries, as well as others
depending on the Host. The 2 of 7 format is available on the ProxPro 5355XXKXX versions.
5.6 Key Pad Data Table 2 of 7
Key # Terminal Number
P2-1 P2-2 P2-3 P2-4 P2-5 P2-6 P2-7
1 LO HI HI HI HI HI LO
2 LO HI HI HI HI LO HI
3 LO HI HI HI LO HI HI
4 HI LO HI HI HI HI LO
February 22, 2007 Page 9 of 14
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