
Mercury Security Corporation, Copyright 2005 MR-10/20 Doc. 10107-0000 rev. 1.03 3/05 Page 4
Informationsubjecttochangewithoutnotice.
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
sentusingthesame signalingmethodas selectedforthe carddataoutput(clock/data ordata1/data 0). Carddata,
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,
ThereaderwillturnonbothLEDsforapproximately1secondandsoundthebuzzerfor1shortbeep.Thenthereader
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.TheLEDinputcanbeusedtoverifytheLEDfunction;andthebuzzerinputforthebuzzerfunction.FortheMR-
20,thereaderwillechoakeypresswithabriefflashofbothLEDsandashortbeepofthebuzzer.Resettotherequired
formatfornormaloperationaftertest.
12. Maintenance:
Thereadersaredesignedtoprovidecontinuousservicewithminimalroutinemaintenance.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
scheduleshouldbedevelopedbase onthecardreader environment (dirtyorclean)and theusagefrequency(light
traffic or heavy traffic). Extreme case may require daily cleaning.
Headcleaningmaybedonebyusingadisposable,pre-saturatedmagneticheadcleaningcard.Thesecardsarereadily
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;SystemID,www.systemid.com888-648-4452).
Thereaderexterior surfaceis coveredwithhigh strengthpolymer andpolyestermembrane. Itmay becleanedwith
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 forWiegand data,1mS for magstripe data
pulse width 50uS typical
LED input: 1-wire mode: input not driven: LEDs off
input > 3.5Vdc: Red LED on