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Mercury Security © 2015 

MR51e 

DOC  10107-0035  

REV 1.06 

 Page   5 

7.  Input Circuit Wiring: 

Typically, these inputs are used to monitor door position, request to exit, or alarm contacts.  Input circuits 
can  be  configured  as  unsupervised  or  supervised.    When  unsupervised,  reporting  consists  of  only  the 
open or closed states.   

When  configured  as  supervised,  the  input  circuit  will  report  not  only  open  and  closed,  but  also  open 
circuit,  shorted,  grounded*,  and  foreign  voltage*.    A  supervised  input  circuit  requires  two  resistors  be 
added to the circuit to facilitate proper reporting.  The standard supervised circuit requires 1K Ohm, 1% 
resistors  and  should  be  located  as  close  to  the  sensor  as  possible.    Custom  end  of  line  (EOL) 
resistances may be configured via the host software.  

*

 Grounded and foreign voltage states are not a requirement of UL 294 and therefore not verified by UL. 

 

The input circuit wiring configurations shown are supported but may not be typical:  

 

 

8.  Relay Circuit Wiring: 

Two Form-C contact relays are provided for controlling door lock mechanisms or alarm signaling.  The 
relay contacts are rated at 5 A @ 30 Vac/dc, dry contact configuration.  Each relay has a Common pole 
(C), a Normally Open pole (NO) and a Normally Closed pole (NC).  When you are controlling the delivery 
of  power  to  the  door  strike,  the  Normally  Open  and  Common  poles  are  used.    When  momentarily 
removing  power  to  unlock  the  door,  as  with  a  mag  lock,  the  Normally  Closed  and  Common  poles  are 
used.  Check with local building codes for proper egress door installation. 

Door lock mechanisms can generate feedback to the relay circuit that can cause damage and premature 
failure of the relay.  For this reason, it is recommended that either a diode or MOV (metal oxide varistor) 
be used to protect the relay.  Wire should be of sufficient gauge to avoid voltage loss. 

 

It is possible for the MR51e to provide power for a 12 Vdc door strike providing the maximum current is 
not exceeded, see specification section.  

 

 
 
 
 
 
 
 
 

1K,1%

1K,1%

1K,1%

1K,1%

Standard Supervised Circuit,
Normally Closed Contact

Standard Supervised Circuit,

Normally Open Contact

Unsupervised Circuit,
Normally Open Contact

Unsupervised Circuit,
Normally Closed Contact

TB2

IN4

IN2

IN3

1

IN1

TB1

1

}

 

Diode Selection: 

 

Diode current rating: 1x strike count 
Diode breakdown voltage: 4x strike voltage 
For 12 Vdc or 24 Vdc strike, diode 1N4002 
(100V/1A) typical. 

 

 

TB6

2-C

NC

NC
NO

1

NO
1-C

Содержание MR51e

Страница 1: ...ED mode only Reader port 2 can accommodate a reader that TTL D1 D0 Clock Data or F 2F signaling and also provides tri stated LED control and buzzer control one wire LED mode only Two Form C relay outputs may be used for door strike control or alarm signaling The relay contacts are rated at 5 A 30 Vac dc dry contact configuration Four inputs are provided that may be used for monitoring the door con...

Страница 2: ...T Data 0 Input TB5 1 VO Auxiliary Power Output 12 Vdc TB5 2 GND Auxiliary Power Output Ground TB5 3 VIN Input Power 12 Vdc from local power supply TB5 4 GND Input Power Ground TB6 1 NO Relay K1 Normally Open Contact TB6 2 1 C Relay K1 Common Contact TB6 3 NC Relay K1 Normally Closed Contact TB6 4 NO Relay K2 Normally Open Contact TB6 5 2 C Relay K2 Common Contact TB6 6 NC Relay K2 Normally Closed ...

Страница 3: ...e MR51e is Ethernet 10Base T 100Base TX It is not recommended to connect the MR51e to a public intranet 6 Reader Wiring Reader port 1 supports TTL D1 D0 Clock Data F 2F or 2 wire RS 485 device signaling Reader port 2 supports TTL D1 D0 Clock Data or F 2F signaling Power to reader port 1 is 12 Vdc at 180 mA maximum Reader port 2 may be powered from the auxiliary power supply output TB5 1 and TB5 2 ...

Страница 4: ...TR FIRST READER PORT 12 Vdc D1 GROUND DO GREEN LED F 2F Reader 1 VO 12 Vdc GND LED BZR CLK D1 DAT D0 TB3 FIRST READER PORT TB4 1 BZR DAT D0 CLK D1 LED 1 TB5 GND VIN GND VO 12 Vdc D1 GROUND DO GREEN LED F 2F Reader SECOND READER PORT 1 TB3 VO 12 Vdc GND LED BZR CLK D1 DAT D0 12 Vdc D1 GROUND DO GREEN LED F 2F Reader NORMALLY CLOSED CONTACT DOOR MONITOR SWITCH REQUEST TO EXIT SWITCH NORMALLY OPEN CO...

Страница 5: ...rated at 5 A 30 Vac dc dry contact configuration Each relay has a Common pole C a Normally Open pole NO and a Normally Closed pole NC When you are controlling the delivery of power to the door strike the Normally Open and Common poles are used When momentarily removing power to unlock the door as with a mag lock the Normally Closed and Common poles are used Check with local building codes for prop...

Страница 6: ...e encryption disabled 0 8 second ON 0 2 second OFF 1 On line encryption enabled four pulses 0 1 second ON 0 1 second OFF per second Off line 0 2 second ON 0 8 second OFF static addressing mode only Waiting for application firmware to be downloaded 1 sec ON 1 sec OFF 2 Flashes when there is host communication approximately every 5 seconds 3 Flashes when data is received from either reader downstrea...

Страница 7: ...above LED Output TTL compatible high 3 V low 0 5 V 5 mA source sink maximum Buzzer Output Open collector 12 Vdc open circuit maximum 40 mA sink maximum Data Inputs Reader port 1 TTL compatible F 2F or 2 wire RS 485 Reader port 2 TTL compatible or F 2F Cable Requirements Communication Ethernet Category 5 minimum Power 1 twisted pair 18 AWG Alarm Inputs 1 twisted pair per input 30 ohm maximum Reader...

Страница 8: ...IC TAMPER SWITCH 11 Additional Mounting Information Sources for the optional items shown below 3 gang stainless steel blank cover Available from Leviton part number 84033 40 Graybar part number 88158404 Magnetic switch set G R I part number 505 Side View Mounting Plate Dimensions 3 85 97 8 2 35 59 7 5 50 139 7 3 63 92 1 3 30 83 8 3 63 92 1 Ø0 16 Ø4 0 MR50 MGT HOLES 4PL Ø0 16 Ø4 0 3 GANG MGT HOLES ...

Страница 9: ...entative to make any other warranties or implied warranties and expressly excludes and disclaims all implied warranties of merchantability or fitness for a particular purpose All returns must be accompanied by a Return Material Authorization RMA number obtained from customer service and prepaid postage and insurance Liability The Interface should only be used to control exits from areas where an a...

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