Keri Systems MR51e - Manual (Page 3)

Mercury Security © 2013 MR51e DOC 10107-0035 REV 1.05 Page 3
3. DIP Switches:
The addressing mode used is determined by the DIP switch setting on the MR51e:
4 3 2 1 Addressing Mode Meaning
OFF OFF OFF OFF MSC-Specific DHCP (original method)
OFF OFF OFF ON Public DHCP
OFF OFF ON OFF Static IP
OFF OFF ON ON Programming Mode for Static IP Address Assignment
ON ON ON ON MSC-Specific DHCP (original method)
Notes:
 Public DHCP and Static IP Addressing Modes are available with MR51e firmware
revisions 1_4_2 and later
 All other DIP switch settings are reserved for future use
 Press S2 to reset board after DIP switch is changed for new address mode
4. Input Power:
The MR51e is powered by one of two ways (jumper selected):

Power is supplied via the Ethernet connection using PoE, fully compliant to IEEE 802.3af

Or local 12 Vdc power supply, TB5-3 (VIN), TB5-4 (GND).
5. Communication Wiring:
Communication between the EP controller and the MR51e is Ethernet. (10Base-T/100Base-TX)
6. Reader Wiring:
The first reader port supports Wiegand, magnetic stripe, and 2-wire RS-485 electrical interfaces. The
second reader port supports Wiegand and magnetic stripe electrical interfaces. Power to the first reader
is 12 Vdc and is current limited to 150 mA. The second reader may be powered from the auxiliary power
output on TB5-1 and TB5-2. Readers that require different voltage or have high current requirements
should be powered separately. Refer to the reader manufacture specifications for cabling requirements.
In the 2-wire LED mode, the Buzzer output is used to drive the second LED. Reader port configuration
is set via the host software.
When powering any remote device(s) by the MR51e, care must be taken not to exceed the maximum
current available. Cable gauge must also be evaluated. See specifications section for details.
MR
-1
0/
20 R
EA
DE
R
ADDRESS 0
MR-DT
RS-485 MODE
9600 BAUD
TB
3
TB
3
FIRST READER PORT
DATA1/DATA0 OR CLOCK/DATA FIRST READER PORT
2-WIRE RS-485
WHT (3)
BLK (6)
GRN (2)
ORG (5)
BRN (4)
RED (1)
CLK/D1
GND
DAT/D0
LED
BZR
VO
12Vdc (RED) (1)
TR+ (BLUE) (3)
GROUND (BLACK) (2)
TR- (GRAY) (4)
DAT/D0
CLK/D1
GND
VO
1 1
TB4
TB5
SECOND READER PORT
DATA1/DATA0 OR CLOCK/DATA
WHT (3)
RED (1)
GRN (2)
ORG (5)
BRN (4)
BLK (6)
CLK/D1
GND
VO
DAT/D0
LED
BZR
1
1
M
R
-10/
20
R
EA
DE
R