FSK RHINO 816, Installation Manual, Page: 9 / 51

FSK-RAP816-V2015.04 9
Connecting Devices to the Network
Before connecting devices to the control panel network, 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.
Remote keypads are all connected to the 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.
Network Connections
The network is 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. The table below shows each terminal and
its description:
+ RED +12V Supply
- BLK 0V Supply
R GRN Data Return
D YEL Data I/O
Cable Type and Distances
For improved immunity to electrical noise, the use of screened 4
core cable is recommended. The screen should be twisted together
and wired into the (
– ) terminal at the control panel only.
The maximum recommended distance for devices when using
standard 7/0.2 alarm cable is:
f
250m for each branch when using the star (parallel)
configuration
f
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.
Overcoming Voltage Drop
There are several ways to overcome voltage drop:
f
Use thicker lower resistance cable. Standard 7/0.2 alarm cable
has a resistance of 8
Ω per 100m
f
Double up on the power connections – this will require using a
6 or 8-core cable rather than a 4-core cable
f
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 below).
The maximum tested network distance is 400m.