Mercury BR20 Installation And Maintenance Manual

www.mercury-security.com

2355 MIRA MAR AVE. LONG BEACH, CA 90815-1755, [phone] FAX [phone]

This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions:

BR20 Magnetic Card Reader

Installation and Maintenance

(1) This device may not cause harmful interference,
and (2) this device must accept any interference
received, including interference that may cause un-

1. General:

The BR20 magnetic stripe card reader is designed for reading standard or high-coercivity magnetic stripe cards. The
BR20 also provides a 12-key keypad for PIN entry and provides a TTL interface. The following paragraphs describe

instructions for installing and maintaining the card reader. The BR20 does not support the tamper switch option.

2. Mounting the Reader:

Find a suitable location to anchor the reader mounting bracket. The reader may be mounted vertically or horizontally.
See recommended orientation. The mounting of the reader does not require a junction box. However, rigid conduit
is required for outdoor application. A single gang junction box may be used to provide a transition to rigid conduit.
If a single gang junction box is used, a wall plate (optional) may be used to cover the junction box. The reader is then
secured to the mounting bracket using a screw. Refer to figures for reader dimensions and typical junction box usage.

3. Reader Wiring:

The reader has a RJ-11 modular jack for easy field connection. A short piece of pre-terminated cable is supplied with
each standard reader for field wiring. The pre-terminated cable has nonstandard color. Refer to pin number if the pre-

terminated cable is not used. Cable with wires of 24AWG or larger are recommended for field wiring.

4. Connecting the Keypad:

The BR20 provides a 12-key keypad for PIN entry. The flex tail of the keypad is connected to the electronic board via
a ZIF (zero insertion force) connector. The contacts are engaged/disengaged by a moving slide. Care must be
exercised when connecting and disconnecting the keypad. When connecting the keypad to the board, open the slide
as shown. Insert the electronics into the housing and insert flex tail in the ZIF connector. Then, close the slide to engage
the contacts. To disconnect the keypad, follow the previously described steps in reverse.

5. Weather Proofing the Reader:

CAUTION: DO NOT DISCONNECT
KEYPAD WITHOUT DISENGAGING
THE CONNECTOR!

Information subject to change without notice.

CONFIDENTIAL: For installation and maintenance use only. DO NOT distribute.

Mercury Security Corporation, © 2008 BR20 Doc. 10107-0024 rev. 1.03 10/2008 Page 1

The reader is rated to operate over an extended
temperature range and the electronics are conformal
coated against moisture. If the reader is expected to
be exposed to weather, use the dielectric grease to
coat the field connections. 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

6. TTL Interface:

6 (BLK) GND
5 (ORG) BUZZER/LED
4 (BRN) LED
3 (WHT) DATA 1/CLOCK
2 (GRN) DATA 0/DATA
1 (RED) +5 or +12Vdc

depends on model

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 Re d 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 Setting:

The DIP switch on the BR20 reader is used to select a preset format, the functions for the LED and buzzer, and the
output signal format, etc. The preset format determines how the card is interpreted. Refer to the format specification
for detail. The settings are for STANDARD models ONLY. The BR20 does not support the tamper switch option.

FORMAT SW-4 SW-3 SW-2 SW-1 OUTPUT LED BUZZER TAM PER

0 ON ON ON ON DATA 1/DATA 0 1-W IRE LED YES NO
1 O N ON ON O F F CLOCK/ DATA 1-W IRE LE D YE S NO
2 O N ON OFF O N CLOCK / DA TA 1-WIRE LED YES YES
3 ON ON OFF OFF CLOCK/DATA 1-W IRE LED YES NO
4 O N OFF O N ON DA TA 1/ DA TA 0 1-W IRE LE D YE S NO
5 ON OFF ON OFF DATA 1/DATA 0 1-W IRE LED YES NO
6 ON OFF OFF ON DATA 1/DATA 0 1-W IRE LED YES NO
7 O N OFF O FF O FF DATA 1/ DA TA 0 1-W IRE LE D Y E S NO

Information subject to change without notice.

Mercury Security Corporation, © 2008 BR20 Doc. 10107-0024 rev. 1.03 10/2008 Page 2

12 OFF OFF ON ON CLOCK/DATA 2-WIRE LED NO NO
13 OFF OFF ON OFF DATA 1/DATA 0 2-WIRE LED NO NO
15 OFF OFF OFF OFF CLOCK/DATA 1-WIRE LED YE S YES