MIDDLE LEVEL SYSTEM COMMUNICATION
The R3500 fire alarm control panels is the basic component of the system.
The R3500 Fire Alarm Control Panel (hereinafter referred to as R3500) can be provided in three versions:
- R3510 – with a blank door, remote operator control panels and OIP40 display panels;
- R3520 – with operator control panel built-into the instrument door and remote OIP40 display panels;
- R3530 – with operator control panel and OIP40 display panel built-into the instrument door.
All panel versions have the ability to connect external remote control panels and display panels. It is possible to install up to 10 units into the control panel, depending on the required functionality.
Units installed by default:
- PSU-5 - power supply unit;
- PMU-5 - power management unit;
- PCU-R3 - peripheral control unit.
Units installed in the panel as an option (no more than 8 pieces in one panel):
- REL-16 - relay unit;
- NET-2 (net unit) - FCPBus interface unit;
- MMI-2 (man machine interface unit) - MMIBus interface unit;
- PCU-R3 - peripheral control uni;
- LAN-1 - local area network unit.
Depending on F3500 version the instrument may be re-fitted with operator control panel (OCP). OCP connection is performed using MMIBus interface. Distance between a R3500 instrument and OCP should not exceed 1000 m.
Each R3500 instrument has provision for connection of OIP40 display panels. It is possible to connect up to 8 display panels to an instrument of R3510 and F3520 versions. R3530 instrument is already equipped with a display panel that is why it is possible to connect not more than 7 OIP40 panels to it.
RECEIPT AND CONTROL PANELS NETWORK, FCPBUS INTERFACE
For several R3500 panels’ interaction within one system, the NET-2 unit must be installed in each of them. This unit integrates R3500 panels into a single system through the FCPBus interface (physical layer of the FCPBus interface). When combining panels, if necessary, cross-connections are implemented, - switching of the executive modules connected to the ACL of one panel, when the events “Fire”, “Pre-alarm”, etc., occurred on another panel.
The FCPBus interface is arranged using two independent communication channels. To ensure reliability, each channel must be designed as a separate cable. For networking, use a shielded twisted pair cable, and the FCPBus network topology - is a common bus. The maximum length of this interface is 1000 m.
LOW LEVEL SYSTEM COMMUNICATION
ADDRESSABLE COMMUNICATION LINES TOPOLOGIES
All addressable devices and ?re alarm system modules exchange information with the fire alarm control panel, which is the center for collecting, processing information and control signals delivery. This interaction is the low level of the “Rubezh” TM addressable system control.
By default, the R3500 panel includes one PCU-R3. Up to seven PCU-R3s can be installed in each R3500, if it is necessary to expand the number of controlled addressable panels or the number of addressable communication lines.
To organize communication at the low level, an addressable communication line (ACL) is used. The addressable communication line is a two-wire digital data transmission interface based on the RS-R3 protocol developed by the “KB “Pozharnaya Avtomatika” Design Bureau. Two ACL wires simultaneously provide the information exchange between the fire alarm control panel and addressable devices; and addressable devices, such as fire detectors, input modules IM1 and IM4, output modules OM1, OM4 and POM1, devices LI, IOCM43 and IOM22 power supply. Devices such as IOCM43, OCM1, OCM4 require additional external power for operation.
There are several ACL topologies supported by the R3500 panel:
- loop with branches;
- radial (if allowed by the national standard).
ACL loop topology - provides maximum reliability of communication lines. With this networking, the line starts at the “B” terminals (LOOP1 or LOOP2) of the panel, passes through the premises of the facility and ends at the “E” terminals (LOOP1 or LOOP2) of the panel, forming a loop. The ACL length should not exceed 3000 meters.
The loop line topology allows the panel to communicate with all addressable devices even in case of line break. Two radial lines result from the broken loop ACL; some of the addressable devices appear to be connected to one ACL branch, and the other part - to another ACL branch. Thus, the operability of all devices is ensured with a single break in the loop line. A short circuit in the loop ACL as well as in the radial one) results in the loss of communication between the panel and all the devices on this line. To protect the line from the short-circuit and keep the part of the line in operating condition, it is recommended to install line insulators LI, which separate the closed-loop from the rest of the line.
Loop ACL with branch lines.
This networking provides the same reliability as in a loop line and the possibility of branching as in a radial line. There is a limitation on the line, as in the previous cases - the total line length should not exceed 3000 meters. The branches are most vulnerable in case of break and short circuit. It is recommended to install LI line insulators around the loop and at the beginning of each branch. If a short circuit occurs in the loop, then communication with the devices will be lost not only in the area between the insulators, but also on the branch, which is connected to the loop line between these insulators.
TOP LEVEL SYSTEM COMMUNICATION
INFORMATION OUTPUT FROM THE FIRE ALARM CONTROL PANEL TO THE COMPUTER.
The Top level of the system is implemented using a computer.
The computer must have the “FireSec” software installed. The computer is used for configuring the system, i.e. creating a database of the protected facilities and the logic of the system response for certain arising events. Fire alarm control panels perform the protecting functions only after installation of the FireSec software configuration. This is a mandatory step when setting up the system, which is performed only from a PC.
Fire alarm control panels (middle level) are connected to a computer (top level) using the Ethernet interface. A special unit built into the R3500 panel - LAN-1 is designed to connect the panel to the Ethernet network.
A special LR3 protocol is used to exchange information between the PC and the LAN unit. Each panel is connected using a LAN unit installed in the corresponding panel.