Approved Document No.: DNU0951001 Rev 5 • Page 2 of 8
QUICK
START INSTALLATION GUIDE
-V
e SIG +V
e
1 -V
e
+V
e
Spr Sig -V
e
Sig -V
e
+V
e
NC C NO
NEGA
TIVE
SIGNAL
POSITIVE
F U S E
L
N
CONN
2
R
R
E
E
S
S
E
E
T
T
Indicators will operate:
Continuously when pull cord is activated
Intermittently when help is on the way
On
Callin
g
Call
Accept
Accept
Reset
PLK1
Selectable Link
Mains Connector
230Va.c. from
3A switched
fused spur
(not supplied)
NC943B
Single Zone Call Controller
c/w Sounder
(mounts on a 25mm UK double
gang back box)
TYPICAL LOCATION
Outside the WC in a remote
staffed area.
NC806CS
Overdoor Light
c/w Sounder
(mounts on a
25mm UK single gang back box)
TYPICAL LOCATION
Outside the WC above the door.
NC809DBBT
Accessible Toilet Reset
Point c/w sounder
(mounts on a 25mm UK single gang back box)
TYPICAL LOCATION Inside the WC so it is
reachable from the WC
and a wheelchair.
Position bottom edge 800- 1000mm above floor level.
DO NOT connect
+Ve to the pull’s
signal (Sig) terminal
as this WILL damage
the device.
1mm
2
T&E
Figure 1 below, summarises key information provided in this document. For experienced installers, this should be all you need t
o get started.
NC951 components can be wired in any order.
If in doubt, or if using this equipment for the first time, read the full document.
Volt-free
relay contacts
The call controller is a piece of Class 2 equipment. However, any metal parts used during installation,
i.e. metal back box,
MUST
be earthed.
Three cores of four core stranded burglar alarm cable
NC807C
Ceiling / Wall Pull
(surface mounting)
Base fits 16mm
conduit and BESA centres
TYPICAL LOCATION Alongside the WC. Set upper triangle 800-1000mm above floor level. Set lower
triangle 100mm above floor level.
Figure 1 : Typical
NC951
Accessible Toilet Alarm Wiring
Approved Document No.: DNU0951001 Rev 5 • Page 7 of 8
BASIC OPERATION
The default operation of the NC951 is shown in the diagrams below.
Raising an alarm call
Accepting an alarm call and resetting the system
The distressed person raises
an alarm call by pulling the
cord on the ceiling / wall pull.
The overdoor light activates to visually
and audibly guide people to the area
where assistance is required.
The call controller’s red ‘Calling’ LED and sounder
activate steady to let staff know someone inside
the WC requires assistance.
Inside the WC
The ceiling / wall pull’s red LED activates steady,
the reset point’s red LED and sounder activate steady
to confirm an alarm call has been raised.
Outside the WC
A member of staff accepts the
alarm call by pressing the call
controller’s ‘Call Accept’ button.
Outside the WC
Once assistance has been provided,
the call is cancelled by pressing the
reset point’s ‘RESET’ button.
The system returns to normal.
The ceiling / wall pull’s red LED activates steady,
the reset point’s red LED and sounder activate
intermittently to confirm help is on the way.
Inside the WC
Note: The call controller’s on-board relay will also activate when an alarm call is made and
any external equipment connected to the relay contacts will operate as configured.
Note: Instead of accepting an alarm call,
a selectable link inside the call controller
also allows its button operation to be set
up to reset the system, or have no effect.
Refer to ‘Engineer Selectable Functions’
section for details.
