Mercury Security Corporation, Copyright 2005
MR-10/20
Doc. 10107-0000 rev. 1.03 3/05
Page 4
Information subject to change without notice.
10. Keypad Data and Tamper Monitor Signalling:
Keypad data and tamper monitor status are transmitted on the data lines as 8-bit blocks. They are encoded and
sent using the same signaling method as selected for the card data output (clock/data or data 1/data 0). Card data,
tamper status data, and keypad data blocks are separated by a minimum of 100 milliseconds. See following for
codes:
10110000 - 0 (ASCII '0', odd parity, MSB first)
00110001 - 1 (ASCII '1', ...)
00110010 - 2 (ASCII '2', ...)
10110011 - 3 (ACSII '3', ...)
00110100 - 4 (ASCII '4', ...)
10110101 - 5 (ASCII '5', ...)
10110110 - 6 (ASCII '6', ...)
00110111 - 7 (ASCII '7', ...)
00111000 - 8 (ASCII '8', ...)
10111001 - 9 (ASCII '9', ...)
00101010 - * (ASCII '*', ...)
00100011 - # (ASCII '#', ...)
11010011 - SAFE (ASCII 'S', ...)
01010100 - ALARM (ASCII 'T', ...)
11. Reader Verification:
The reader performs a self-test when power is first applied to the unit. If power-on test is successfully completed,
The reader will turn on both LEDs for approximately 1 second and sound the buzzer for 1 short beep. Then the reader
is ready for normal operation.
If further verification of the reader hardware is needed, the reader may be temporarily set to format T. With this
format selected, the reader will read and verify standard ANSI track 2 encoded card. If no read error is detected,
the green LED will flash. Otherwise, the red LED will flash and the buzzer will sound two short beeps to indicate an
error. The LED input can be used to verify the LED function; and the buzzer input for the buzzer function. For the MR-
20, the reader will echo a key press with a brief flash of both LEDs and a short beep of the buzzer. Reset to the required
format for normal operation after test.
12. Maintenance:
The readers are designed to provide continuous service with minimal routine maintenance. However, contaminants
(such as magnetic oxides from badges and dirt) tend to accumulate on the read head. Without regular cleaning,
these contaminants will shorten the read head life and increase the probability of card read error. A maintenance
schedule should be developed base on the card reader environment (dirty or clean) and the usage frequency (light
traffic or heavy traffic). Extreme case may require daily cleaning.
Head cleaning may be done by using a disposable, pre-saturated magnetic head cleaning card. These cards are readily
obtainable from a number of sources (e.g. Clean Team Co., www.cleanteam.com, 800-888-8830; KIC Products,
www.kicproducts.com, 207-514-7030; System ID, www.systemid.com 888-648-4452).
The reader exterior surface is covered with high strength polymer and polyester membrane. It may be cleaned with
a soft cloth and mild detergent if required.
13. Specification:
The reader is for use in low voltage, class 2 circuits only.
Power:
Voltage -
5Volt Model: 5.8 Vdc (4.9 to 6.4 Vdc)
12Volt Model: 12 Vdc (10.2 to 13.8 Vdc)
Current -
50mA (25mA typical.)
Data output:
Data 1/0 pair or clock/data
Timing-
clock/data -
period 1mS
setup/hold time 400uS, clock pulse width 200uS typical
data 1/0 -
period, 1mS for Wiegand data, 1mS for mag stripe data
pulse width 50uS typical
LED input:
1-wire mode:
input not driven: LEDs off
input > 3.5Vdc: Red LED on
