Mercury Security Corporation, Copyright 2005
MR-10/20
Doc. 10107-0000 rev. 1.03 3/05
Page 2
Information subject to change without notice.
6. TTL Interface:
The TTL interface has the standard 5-wire interface widely
used in the access control application. In addition, an input
to control the buzzer is provided. Cable with minimum of
24AWG wires should be used.
Pin #
Wire
Signal
Description
1
Red
Vin
Power supply input, 5Vdc or 12Vdc, Model dependent
2
Green
/Data (Mag) or
Reader data output
/Data 0 (Wieg)
3
White
/Clock (Mag) or Reader data output
/Data 1 (Wieg)
4
Brown LED
LED input
1-wire control: 0V turns on the green LED
5V turns on the red LED
2-wire control: 0V turns on the red LED
5
Orange Buzzer/LED
Buzzer/LED input:
1-wire control: 0V turns on the buzzer
2-wire control: 0V turns on the green LED
6
Black
Signal Ground
Power supply return, DC ground
7. Grounding the Reader:
To avoid having ESD (electrostatic discharge) interfering with the operation of the reader, the reader casing shall be
grounded. This can be accomplished by tying the mounting bracket to earth ground locally (e.g. grounded conduit).
8. DIP switch/Jumper setting:
The DIP switch/jumper on the MR-10/20 readers are used to select
a preset format. This preset format determines how the card is
interpreted, the functions for the LED and buzzer, and the output
signal format, etc. Refer to the format specification for detail. The
settings are for STANDARD models ONLY.
5. Weather Proofing the Reader:
The reader is rated to operate over an extended temperature range.
However, if the reader is expected to be exposed to weather, the
weatherized option (-OW) must be ordered. The option is imple-
mented in two parts. With the (-OW) option, the electronics is
conformal coated against moisture. A tube of dielectric grease is
supplied for the installer to coat field connections to complete the
procedure. After field connection/configuration is made, the grease
is to be applied on the DIP switch slides, keypad connection, and
the RJ-11 jack to seal out moisture.
Do not use sealant to seal reader case to the wall
. Doing so
will trap water in the reader and may cause damage to the reader.
MODULAR PLUG
1 (RED) +5 or +12Vdc
2 (GRN) DATA 0/DATA
3 (WHT) DATA 1/CLOCK
4 (BRN) LED
5 (ORG) BUZZER
6 (BLK) GROUND
depends on model
4 3
2 1
