Node Unit (NU)
The NU comprises a small two part polycarbonate case
containing a single pcb on which are terminal blocks.
The unit is connected to the control network and is a
control and connecting device for four circuits and four
programmable outputs. It also contains a sounder
output and a sounder mute output. It has no external
controls hence it may be positioned at any convenient
location as access is normally only required for
maintenance. The unit is surface mounted and has
cable entry points in the base top and bottom.
Remote Keypad Node Unit (REM)
The REM comprises a small two part polycarbonate
case containing a pcb and the system controls
consisting of:
1. A 15 key tactile keypad for entering data and
programmingthe system.When inusethe keypadis
illuminated;
2. A liquid crystal display (LCD) of two lines of 20
characters each which provides system status
information and gives directions when
programming the system.
The unit is connected to the control network and is a
control and connecting device for four circuits and four
programmable outputs. The base contains a terminal
block for all external connections and the unit is fitted
with an internal sounder which provides local alarms
and system status sounds. The unit is surface mounted
andhascableentrypointsinthebaseonallfoursides.
The REM’s are used to control and programme the
system hence they must be positioned at suitable
control positions with easy access.
Ward Control Unit (WCU)
The WCU comprises the same case as the NU and
contains a single pcb on which are terminal blocks. If
fitted the unit acts as a control and interface device to
allow a designated Ward to be Set and Unset using its
own dedicated Exit and Entry route and units. The WCU
maybe positionedat anylocationnormally adjacentto
its Exit/Entry devices andto itscontrolling REMor NU. The
unitissurface mountedandhascable entrypoints inthe
basetop andbottom. Itcontainscontrols foritsWard for
settingtheentry time,exit timeand settlingtime andlinks
to select the type of exit procedure.
System Control Network
The CP supplies power to and monitors all the
connected NU and REM via a six or eight wire Control
Network. Each connected unit is ’daisy chained’ to the
Network and the maximum permitted distance
betweenunits is100mbut thefurthestunitin afullsystem
is limited to a total cable length of 1 km from the CP.
496529 Issue A 7 of 20 TS2000
TS2000
Ward
Control
Unit
Loudspeaker
REM
or
NU
12V Supply
Exit Terminate (ET Con)
Access (Acc Con)
Last Exit/Entry(LX Con)
Ward Control Outputs:
Ward Set Fail (A)
Ward Exit (B)
Ward Set (C)
Ward Alarm (D)
Ward Control Circuits
Ward Control (A)
Last Exit Out (B)
Access Out ( C)
Network
Network
Figure 3. Ward Control Unit Schematic
