Br3
USER’S GUIDE
PROGRAMMABLE 3-RELAY LOGIC MODULE
1 Description
75.5501.02 EN 20091102 (75.5500)
Page 1 of 15
The Br3 is a programmable 3 relay logic module that may be used for
multiple applications, including simple timing, door mounted sensor
inhibiting and advanced relay sequencing. The Br3 contains 12
different programmable functions which allow the technician to carry
one and only one module.
In addition to the ability to provide up to 3 Amps through the first
two relays and 1 Amp through the third relay used in ‘‘DRY’’ mode,
the Br3 provides the ability to select a ‘WET’ voltage output of
up to 1 Amp on Relay 1 to power electric strikes and magnetic
locks without the need for an external power supply. This feature
can greatly simplify the installation (as long as the power supply
powering the Br3 is rated for 1 Amp).
The ‘WET’ output can also be set using jumpers to output DC if the Br3 is supplied with AC, otherwise it will just pass the AC voltage that is
supplied. Similarly if powered by DC, the ‘WET’ output will only output DC.
The module provides removable screw terminal connectors which help to reduce extra wiring.
Another feature of the Br3 is that it also provides an easy 2-button digital programming with a user-friendly display, hold times being adjustable
from 0 to 60 seconds, and delay times being adjustable from 0 to 60 seconds with ¼, ½ and ¾ also available to the applicable functions.
Programming
Push
Buttons
‘WET’ Output Selector
Inputs / Outputs
Br3 APPLICATIONS GUIDE
(Refer to the corresponding page number for a more detailed description and programming of each function.)
FUNCTION SUBJECT
DESCRIPTION
PAGE
1 0
(MC10)
Simple Timer
Provides an activation of Relay 1 triggered by Input 1. The function also provides an option for
reverse-logic on the activation of Input 1.
4
1 1
(MC11)
Ratchet/Latching
Provides a ratcheting/latching of Relay 1 triggered by Input 1. Each trigger of Input 1 will change the
state of Relay 1.
4
2 1
(LE21)
Inhibitor w/Door
Position Input
Provides an activation of Relay 1 with an inhibitor of activation of Input 1 until Input 2, Input 3 or
‘WET’ Input is triggered, which all activate Relay 1. Additionally Input 4 provides a door position switch
input for which closing it will re-inhibit Input 1.
5
2 2
(LE22)
2 Relay Sequence
Inhibitor w/Door
Position Input
Provides a sequence for Relay 1 and/or Relay 2 with an inhibitor of activation of Input 1 until Input
2, Input 3 or ‘WET’ Input is triggered, which all activate the sequence. Additionally Input 4 provides
a door position switch input for which closing it will re-inhibit Input 1. Simply put this function is a
combination between a LE21 and MC25.
6
2 5
(MC25)
2 Relay Sequence Provides a sequence for Relay 1 and/or Relay 2 triggered by Input 1 or ‘WET’ Input.
7
2 8
(MC28)
2 Relay Sequence
w/Door Position
Input
Provides a sequence for Relay 1 and/or Relay 2 triggered by Input 1 or ‘WET’ Input. Additionally Input
2 provides a door position switch input which allows the delay to run when Input 2 is opened, but not
run when closed. Simply put, this function is an MC25 with a normally opened door position switch
input to determine if the delay should run.
8
2 9
(MC29)
Relay 1
Deactivation
Timer
Provides a sequence for Relay 1 and/or Relay 2 triggered by Input 1 or ‘WET’ Input. Additionally Input
2 provides a door position switch input which allows Relay 1 to deactivate once Input 2 is opened after
the sequence has run. Input 2 also allows the delay to run when Input 2 is opened, but not run when
closed, as in the MC28. Input 3 provides an input to disable the sequence whose input logic is also
selectable. Simply put Relay 1 will be active the entire time until the normally opened door position
switch signifies that the door has come closed again.
9
3 5
(MC35)
3 Relay Sequence Provides a sequence for Relay 1 and/or Relay 2 and/or Relay 3 triggered by Input 1 or ‘WET’ Input.
Simply put this function is a MC25 with three relays instead of two.
10
5 0
(MC50)
Interlock Timer
w/Door Position
Inputs
Provides an interlock of Relay 1 and Relay 2 triggered by Inputs 1 and 2, with door position switch
inputs on Input 3 for Input 1and Input 4 for Input 2. Only one relay will be allowed to operate at a
time thus making the two relays interlocked or mutually exclusive. In order to activate a relay, its
corresponding position switch input must be closed.
11
5 5
(MC55)
Interlock Ratchet
w/Door Position
Inputs
Provides an interlock ratchet of Relay 1 and Relay 2 triggered by Inputs 1 and 2, with door position
switch inputs on Input 3 for Input 1 and Input 4 for Input 2. Only one Relay will be allowed to operate
at a time thus making the two relays interlocked or mutually exclusive. In order to activate a relay, its
corresponding position switch input must be closed. Each trigger of an input will change the state of its
respective relay.
12
6 5
(MC65)
2-Way, 2 Relay
Sequence
Provides a two-way sequencer to sequence Relay 1 and/or Relay 2 triggered by Input 1. Similarly, it
also provides a sequence in the opposite direction to sequence Relay 2 and/or Relay 1 triggered by
Input 2. Inputs 3 and 4 also trigger Relays 1 and 2 individually.
13
7 5
(MC75)
2 Relay Sequence Provides a sequence for Relay 1 and/or Relay 2 triggered by Input 1 or ‘WET’ Input.
14
