Issue 4.5 August 2005 Hardware Overview 2-3
SYSTEM COMPONENTS
3GS consists of the following basic components:
● Control Panel
● Power Supply Unit (3, 4, or 6Amp)
● 3GS family of nodes
● Hand Held Terminal (optional)
Controller
The 3GS controller hardware consists of a ringnet
interface, three serial ports, a Power Supply Unit (PSU)
interface, eight direct connect alarm inputs, and four
relay outputs.
Ringnet interface
This interface is used for communicating with nodes
connected to the panel. The maximum distance between
nodes is 1Km (using Belden 9829). This interface uses
RS485 in a ring topology. The main controller therefore
has two RS485 ports and completes the ring connection.
The ringnet interface baud rate is 307kb.
PSU Interface
This interface is used to connect the controller to the
PSU, thus providing power for the controller. This
interface also enables the controller to monitor the PSU
status – for example, battery, fuse, mains, and power
status.
Serial ports
The 3GS controller has three serial ports, which can be
configured for remote or local operation. They can be
used to connect to peripheral devices, such as printers,
modems, digis, PCs, and so on. These ports allow for
remote and local monitoring, reporting and setup –
when used with the range of Europlex peripherals and
PC Software tools.
Alarm inputs
The controller is capable of supporting eight direct
connect inputs. These inputs support the standard
Europlex dual EOL resistors zone (that is, tampers on
zones). The end-of-line resistors used are 2k2 (US: 1k
and 470). To expand the number of zones (to a
maximum of 200), nodes must be added to the Ringnet –
see “Nodes” on page 5-1 for further information.
Outputs
The Controller has 4 x 1Amp Form-C dry contact relay
outputs.
PSU
The 3GS is powered by an off board 12V, 3A/4A/6A
switchmode PSU. All monitoring functions are carried
out by the main controller and include monitoring of
overcurrent condition, fuse fail, mains fail, PSU fail, and
battery.
A battery test is continually perfomed at regular intervals
to ensure optimum performance. The PSU is connected
to the main controller via a flat ribbon cable.
Nodes
The 3GS family of nodes are a series of additional
microprocessor based devices that expand the system’s
capacity and functionality. Available nodes include:
● Remote Keypad Display Node (with optional card
reader
● 8 Input/1 Output and 8 Input/2 Output Nodes
● 6 Output and 8 Output Nodes
● IntelliPower Node
● Access Control Node
● HUA Node
● LEM Node
● Encryption Node
● Wireless Node
● Enhanced Access Node
Common to these devices are:
● Ringnet Communications
● Input/Output Functions
● Infrared Communications
● On-Board Memory
● On-Board Buzzer
Nodes are programmed in a variety of ways: via the
keypad, the HHT IR link, local, or remote PC
programming. This is a simple menu-driven process – see
“System Configuration” on page 2-4.
Hand Held Terminal
The infrared Hand Held Terminal (HHT) is an installer’s
tool for use with the 3GS system. Similar in appearance
to the 3GS keypad with a 2x24 character LCD display,
the HHT comes in a compact carrying case and is battery
powered for portability.
Through the infrared link you can communicate with any
node in the system and extract information such as input
and output status, voltage and current draw, ringnet
communications status and much more. This feature
eliminates the time and cost involved in opening boxes,
moving wires and so on. Other features offered by the
HHT include keypad functions, a serial port, and a
parallel printer port.
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