Hoyles MayDay - Lone worker alarm User Manual
MAYDAY LMW2 Lone Worker Safety System
Specification. IN3 Input from a movement detector such as a PIR (Normally Closed
The MAYDAY is a loneworker safety system. It is designed to give
audible and visual warning to prompt staff to take action by cancelling
a warning after a pre-determined period. Failure to take action will
result in a secondary alarm operating after a further pre-determined
period. This is used to raise an alarm to call for assistance which can
be either a simple sounder and visual indicator or a voice message
transmitted via a speech dialler (not supplied) via a landline. The two
time periods are separately adjustable. 20 - 60 minutes and 2 - 10
minutes respectively. The MAYDAY is mains powered and supplied
with a rechargeable 12v 0.8Ahr standby battery. The integral 12v
power supply will deliver 150ma for ancillary items.
The unit is
housed in a plastic enclosure approx. 125w x 175h x 55d ( mm).
The MAYDAY has the following integral indications and controls:-
1. An On Off keyswitch to arm the unit.
2. An OK button to restart the countdown timer and reset the alarm.
3. A green Power On LED.
4. Four red System Active countdown LEDs.
5 . An integral piezo sounder. (85db at 10cm)
6. Two adjustable countdown timer controls. These are fitted
internally and only used during the installation set-up.
Five inputs are provided for connecting ancillary devices:IN1 Remote OK buttons to supplement the front panel OK button.
(Normally Open -close to acknowledge OK)
IN2 To arm the MAYDAY from a keyswitch or other device. (Normally
Closed - open to start lone working)
-open on detection - ie OK)
IN4 Input from a speech dialler. (Apply a -ve for OK)
IN5 Timer set-up. This is a divide by 60 facility (eg 57mins= 57sec).
Volt free contacts are provided by three independent relays:-
Relay 1 operates when the keyswitch is thrown to arm the unit.
Relay 2 operates at the end of the first pre-determined run down
delay T1 (20-60 minutes).
Relay 3 (normally on, off when operated) operates at the end of
the second pre-determined countdown delay T2 (2-10 minutes).
Eight outputs are provided for remote indications:
LED1 - 4 follow the LEDs on the front panel.
LED5 Remote buzzer, follows internal buzzer
LED6 Remote LED, all indications.
LED7 Remote LED to indicate T2 has run out.
LED8 Remote power LED.
Timer set-up procedure.
With IN2 closed (or keyswitch OFF), link out IN5, LED’s 2 and 4 only
illuminate. Set T1 and T2 pots approx. (Best guess). Press the OK
button, the unit bleeps and leds 1 and 3 only illuminates for T1 time in
seconds. At the end of T1 the unit bleeps and leds 1 and 2 only
illuminate for T2 time in seconds. At the end of T2 the unit bleeps and
reverts to leds 2 and 4 only. Adjust the pots accordingly and repeat
until time T1 and T2 minutes are correct as indicated in seconds.
Remove the link IN5 and the unit is set to operate in minutes.
Loneworker Scenarios where MAYDAY could be used
The notes below will assist in deciding how MAYDAY and ancillary equipment should be used and configured for any particular situation.
The first consideration should be; where are the responders located?
Scenario 1
AV AVAV AV
In this scenario a worker is only allowed in an area for a restricted work that the worker should have vacated the area and should be rescued.
period, perhaps 30minutes. This could be a freezer where reduced
temperature for long periods may be harmful to health or an area with a
high concentration of fumes or very high temperatures.
The worker would arm the MAYDAY with the key to start the countdown front panel of the MAYDAY should be disabled (see below).
timer before entering the area. During the countdown period pre-alarms
are generated to gradually warn that time is running out. At the end of the
restricted period a full alarm is given to alert responders outside the area
T1
T2
MIN
L1
+
L2
L3
+
L4
S
D
C
MAX
A MAYDAY and possibly an AV indicator within earshot of the responder are all
that is needed, no other ancillary devices are needed though repeat AV
indicator(s) may be of benefit to the worker. In this scenario the OK button on the
1 x LMW2
1 or more S1778PR AV units located near the responder (Optional)
1 or more S1778PR AV units for the worker (Optional)
BATTERY FUSE
TPR
TPR
L8
+
L7
L6
+
L5
To re-chargeable battery
in back box
Sited in work area to give
visual indication of System
IN USE and audible
indication to vacate the
area.
Optional
S1778PR
Buzzer & Lamp Unit
Sited near the responder to
give visual indication of
System IN USE and audible
indication of assistance
required.
BZ
+
L1
L2
Optional
S1778PR
Buzzer & Lamp Unit
BZ
+
L1
L2
NC COM NO NC COM NO NC COM NO
16 V
RELAY 1 RELAY 2 RELAY 3
AC
To transformer in back box
MM
+ + + + +
IN1
IN2 IN3 IN4 IN5
IN1 is linked to
disable the OK button
++
--
CONNECTOR
BATTERY
DWG No 60108 iss 4 Jun 12
Hoyles Electronic Developments Ltd
T. 01744 886600 F. 01744 886607 E. sales@hoyles.com W. www.hoyles.com
Scenario 2
PIR PIR
AV
OK
The working practice in force here allows lone working for long periods of is needed, no other ancillary devices are needed though a repeat AV indicator(s)
time. It could be a full 8 hour shift but on a remote part of a site. The with OK acknowledge buttons may be of benefit for the worker depending on the
responder(s) could be some distance away but on the same site. size of the working area. An alternative to an OK button would be one or more
The worker would arm the MAYDAY to start the countdown timer. Prealarms are generated in the same way as in 1 above. Periodically the 1 x LMW2
worker presses an OK button to restart the countdown timer. If the worker
does not, then eventually the MAYDAY generates a full alarm at a remote
audible/visual indicator AV to alert the responder.
A MAYDAY and an AV indicator within earshot of the responder are all that
AV
AV
OK
Passive Infra Red detectors, this could allow for hands free operation.
1 or more S1778PR used as AV units located near the responder
1 or more S1703PR or S1708PR used as AV/OK buttons (Optional) and/or
PIRs (Optional) for the worker.
MIN
T1
T2
MAX
BATTERY FUSE
TPR
TPR
Sited in work area to give
audible & visual indication
and act as an OK
acknowledge button.
Sited in responder area to
give audible & visual
indication that assistance
is needed.
L8
BZ
+
L1
L2
L1
L2
L3
L4
+
+
L6
+
L5
L7
+
Optional S1703PR or
S1708PR AV Unit with
S
OK Button
P1
P2
BZ
+
L1
Optional S1778PR
AV Unit
D
C
NC COM NO NC COM NO NC COM NO
16 V
RELAY 1 RELAY 2 RELAY 3
AC
MM
+ + + + +
IN1
IN2 IN3 IN4 IN5
++
--
CONNECTOR
BATTERY
One or more optional PIR
movement detectors in
PIR
the work area.
Battery connection are not shown for
To transformer in back box
clarity
Scenario 3
PIR PIR
The working practice here and operation is the same as 2 above but the A MAYDAY and an auto-dialler are needed, no other ancillary devices are
responder(s) is remote from the site. needed though one or more OK/ AV buttons may be of benefit to the worker. An
The communication to the responder uses an auto-dialler via a landline.
Signalling can also be given for the start and end of lone working. Up to
three responders telephone numbers can be programmed into the dialler. 1 x LMW2
Each is dialled in turn until acknowledge by the responder dialling 8. A
fourth number can be programmed for the lone worker. If no responder
acknowledges then the lone worker is automatically called to advise that
he/she will be working alone without cover. A separate landline or mobile is
required for this return call.
L1
+
L2
L3
+
L4
S
D
C
NC COM NO NC COM NO NC COM NO
16 V
RELAY 1 RELAY 2 RELAY 3
AC
AV
OK
MIN
T1
MM
T2
MAX
+ + + + +
IN1
IN2 IN3 IN4 IN5
AV
OK
alternative to OK buttons would be one or more Passive Infra Red detectors, this
could allow for hands free operation.
1 x SD1E Autodialer to contact the responder
1 or more S1703PR or S1708PR used as AV/OK buttons and/or PIRs for the
worker.
1 x Mobile phone for the worker (Optional)
BATTERY FUSE
--
++
TPR
TPR
L8
+
L7
L6
+
L5
BATTERY
CONNECTOR
Optional S1703PR or (08)
AV Unit with OK Button
Sited in work area to give
audible & visual indication
and act as an OK
acknowledge button.
P1
P2
BZ
+
L1
One or more
optional PIR
PIR
detectors
in the work area.
Transformer & battery
connections are not
for clarity
D
Tamp Abort
C B A
O/P1-ve
0v
+12vdc
+
Trig
-
Polarity
B1
A1
B
A
Landline
A= White
B= Orange
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