EXITGUARD EX125i
24 hour Door Alarm
The EX125i EXITGUARD is a self contained simple to operate solution for the 24 hour protection of fire exit
and other doors.
It is specifically designed to monitor a door contact with end of line resistors (1k/1k) and provide Fully
Supervised Loop outputs to allow the EXITGUARD to be monitored by a suitable intruder panel. Selectable
resistors allow the outputs to be configured for different intruder panels.
General Operation
The EX125i is controlled using the built in key switch. With the jumper J2 in the LO position, when the
keyswitch is in the 0 (off) position, the protected door maybe opened without generating any form of alarm.
If the key switch is in the I (on) position, opening the door will result in a high powered audible alarm from
the EXITGUARD, the units LED will also flash. Additionally the alarm output (OP1) will also provide an alarm
condition to an intruder panel. Once in alarm, the only way to reset the EXITGUARD is to turn the keyswitch
to the 0 position.
With the jumper J2 in the HI position, when the keyswitch is in the 0 (off) position, the protected door maybe
opened without generating a local alarm, but OP1 will signal as alarm if the monitored door contact is
opened. (This is useful if the monitored door is programmed as final exit, then the OP1 follows the door
opening and closing to set the control panel).
Bleep In Off function
The EX125i includes the Bleep In Off function which while the keyswitch is in the 0 position, causes the
EXITGUARD to bleep and flash its LED every 30 seconds. Every ten minutes that the EXITGUARD is left in
the 0 position it will also briefly play a louder tone.
The Bleep In Off function can be turned on or off using the associated jumper on the PCB.
Alarm Auto Reduction
If the alarm is activated by opening the door when the keyswitch is in the I position, once the door is closed
for a minimum of 1 minute, the alarm sounder will reduce to a bleep every 30 seconds. During the reduced
alarm the LED will continue to flash and OP1 will remain in alarm. Should the door be opened again, the full
alarm sounder will activate again. If the door remains open, the Auto Reduction feature will not take effect.
Safe Set
To prevent accidental alarm activations, the EX125i incorporates a safe set feature. If the keyswitch is
moved from the 0 to the I position while the door is still open, a constant tone will be heard and the alarm
output OP1 will not change state. The door can then be closed within the next 15 seconds and the
EXITGUARD will set without having to move the keyswitch back to the 0 position. However if the door
remains open beyond the 15 seconds, the EXITGUARD will go into full alarm and the alarm output OP1 will
change to the alarm state.
Keyswitch On / Off Monitoring
The EX125i provides a second output OP2 which can be monitored by an intruder panel. This output
indicates the status of the keyswitch. With the keyswitch in position I, the normal state is indicated. If the
keyswitch is in position 0, the alarm state is indicated.
Box Tamper
If the box lid is opened OP2 provides a tamper to the intruder panel by going open circuit.
Door Contact Tamper
If the door contact is tampered when the keyswitch is in the I position, the EXITGUARD will play a
continuous tone and OP1 will provide a tamper condition. If the keyswitch is in the 0 position, a door contact
tamper will just change OP1 to the tamper condition and the tone will not be heard.
Output resistors
The two outputs OP1 and OP2 both have two sets of resistor combinations selectable by four different
jumpers on the PCB. With all four jumpers in position A, the alarm resistor is 1K and the EoL resistor is also
1k for OP1 and OP2. With all four jumpers in position B, the alarm resistor is 4K7 and the EoL resistor is 4k7
for OP1 and OP2.
Other resistor combinations to suit other intruder panels are available on request.
Power requirements
A continuous supply of 12vdc is required, 15mA max quiescent and 150mA max in alarm.
Connection Details
Cause and Event Table
The table below shows the possible events based on the available causes.
Continuous 12vdc
input required
Two purple wires from
keyswitch to 1&2
Two pink wires from
keyswitch to 3&4
Two wire connection
to alarm zone of
intruder panel
Two wire connection
to monitoring zone of
intruder panel
1k
1k
Two wire input from
door contact with
resistors confirgured
as shown
Push conical spring supplied
on to tamper switch
Move jumper to select
required OP1 function
Move jumper to enable or
disable Bleep In Off
RLY3
O
P
2
4
2
3
K
S
W
1
R19
Made In UK
R15
C8
R18
R17
R16
OP2
B
J5
A
A
J6
B
www.hoyles.com
O
P
1
-
IP
+
OP1
B
J3
A
B
J4
A
C4
RLY1
ZD1
R3
C5
J1
C6
J2
C1
R1
R2
IN OFF
BLEEP
OFF
ON
LO
HI
CONTROL
LABEL
D3
PRODUCTION
C3
C7
R6
T1
D2
R4
D1
C2
Move jumpers to
select required OP1
resistors
Move jumpers to
select required OP2
resistors
Dwg 60147 Iss 1 Mar 13
T. 01744 886600 F. 01744 886607 E. [email protected] W. www.hoyles.com
Hoyles Electronic Developments Ltd
Causes
Events
Keyswitch
Off
Off
On
On
Off
Off
Off
On
Off
On
On
On
OP1
Alarm
Normal
Normal
S/C Fault
Normal
Normal
S/C Fault
Alarm
S/C Fault
Alarm
Normal
S/C Fault
Box Tamper
J2
Closed
Open
Hi
Lo
Closed
Hi or Lo
Closed
Hi or Lo
Closed
Closed
Hi
Lo
Open
Hi or Lo
Open
Hi or Lo
Closed
Hi or Lo
Closed
Hi or Lo
Open
Hi or Lo
Open
Hi or Lo
Door Contact
Alarm
Alarm or Normal
Normal
S/C or O/C Fault
Normal
Alarm or Normal
S/C or O/C Fault
Alarm
S/C or O/C Fault
Alarm
Normal
S/C or O/C Fault
OP2
Alarm
O/C Fault
Normal
Normal
Alarm
Alarm
O/C Fault
O/C Fault
Alarm
Normal
O/C Fault
O/C Fault
Sounder
Off or Bleep
Off or Bleep
Off
On
Off or Bleep
Off or Bleep
Off or Bleep
On
Off or Bleep
On
Off
On
Note:
When jumpers for OP1 and OP2 are all set in position A, Normal = 1k and Alarm = 2k (1k+1k)
When jumpers for OP1 and OP2 are all set in position B, Normal = 4k7 and Alarm = 9k4 (4k7+4k7)
