Installation
Premier Elite Series Installation Manual
20
INS176-15
Connecting Devices to the Network
Before connecting keypads, zone expanders and output modules,
isolate ALL power from the control panel (AC Mains & Battery). Do
not continue if there is still power present on the control panel.
Connecting devices with power still present on the control
panel may damage the device or control panel and invalidate
any warranty.
Keypads, zone expanders and output modules are all connected to the
same network terminals located at the bottom left hand corner of the
control panel and may be connected serially (daisy chain), in parallel
(star) or any combination of the two (see Figure 1, page 22 for details).
No more than 8 zone expanders, 8 keypads and 4 output modules
can be connected to each network.
The maximum number of devices that can be connected in total
will depend on the control panel fitted.
Whenever new devices are connected to the networks, they must be
confirmed onto the system using the ‘Confirm Devices’ menu option
(see page 133 for details).
Wiring the Network
The networks are made up of four terminals incorporating power and
data. To ensure correct operation, all four terminals on the device
must be connected to the corresponding terminals on the control
panel, or previous device (see Figure 1, page 22 for details). The
table below shows each terminal and its description:
Terminal
Description
+
+12V Supply
-
0V Supply
T
Transmit Data
R
Receive Data
Devices can be connected using 4-core cable. However, it is recommended
that 6 or 8-
core cable is used as the spare cores can be used to ‘Double Up’
on the power connections if needed.
Stranded tinned annealed copper BS4737 7/0.2 alarm cable can
be used for most installations. However, under certain conditions
it may be necessary to use screened cable of the same
specification.
PLEASE NOTE. The conductor resistance should be no greater
than 8
Ω
per 100metres.
The usage of Low grade TCCA (tinned copper clad cable) can
have a detrimental effect on the operation of the system and the
cable distances specified in this manual.
Cable Distances
The maximum recommended distance for devices when using
standard 7/0.2 alarm cable is:
•
250m for each branch when using the star (parallel)
configuration
•
When using a daisy chain (series) configuration the maximum
distance will depend on the number of devices connected on
the chain. The more devices that are connected, the shorter the
distance to the last device (this is due to voltage drop in the
cable)
Whichever method of wiring configuration is used, ensure that the
voltage between the ‘+’ and ‘–’ terminals at each device is no lower
than 10.0V when the system is running on the standby battery.
The table below shows maximum cable runs when one keypad or
expander is installed using standard 7/0.2 alarm cable with various
loads:
Configuration
Max. Cable Run
1.
Keypad + 2 PIR’s @15mA
250m
2.
Ex 2 PIR’s @15mA
250m
3.
Ex 8 PIR’s @15mA
100m
4.
As No. 3 + 16
Speaker
30m
Distances of up to 1km can be achieved between the control panel and
a device. However, a power supply must be installed close to the
device to power it locally, this will help to overcome voltage drop
caused by the long cable run.
Overcoming Voltage Drop
There are several ways to overcome voltage drop:
•
Use thicker lower resistance cable. Standard 7/0.2 alarm cable
has a resistance of 8
per 100m
•
Double up on the power connections
–
this will require using a 6
or 8-core cable rather than a 4-core cable
•
Install a power supply to power the device locally, remember to
common the two negative connections
Installing a Power Supply
When a power supply is installed, the 0V connections on the power
supply must be connected through to 0V on the control panel and
the +12V connection between the control panel and the device must
be disconnected (see Figure 2, page 22 for details).
Use of pull up resistors
In certain circumstances it may be necessary to use pull up resistors. Constant network errors, devices dropping of off networks, or the use of poor
quality cable can all be helped by utilising resistors to "pull" the network up. making sure that errors in data flow are minimised. The diagram below
details the type and placement of the resistors.
+
-
T
R
N
E
TW
O
R
K
O
U
T
Control Panel
Network 1 or 2
+ -
T R
NETWORK OUT
Keypad or
Expander
+ -
T R
NETWORK OUT
Keypad or
Expander
+ -
T R
NETWORK OUT
Keypad or
Expander
Connect 1K resistor
between R and + at
the Control Panel
1
K
1
K
Connect 1K resistor
between T and + at
the furthest network
device
