EXFIRE360 panel is controlled by two redundant CPUs. An LPC2468 processor is mounted onboard the EXCPU360 modules, which is also equipped with two RS485 ports, two CAN Bus interfaces, 1 USB port for local programming and 1 Ethernet interface. The interface between the CPU and the panel functions is executed through a series of read/write instructions at predefined addresses in the I/O memory map of the CPU. The following block diagram defines the interfaces between the CPU and the peripherals.
BUSCPU is designed to control redundant communications, from CPU switchover to TCP/IP, RS485 and RS232 links. Communication parameters are displaied on the panel, in order to provide full supervision to the operator. BUSCPU has also the specific function of a backplane board which connects the CPUs.
BUSFR board is designed to support and connect the touch-screen interfaces of the I/O modules. It is interfaced with CANBUS board via redundant RS485 links. Each CANBUS board shall be provided with the corresponding BUSFR module even though CANBUS is functionally indipendent from BUSFR. The BUSFR can be inspected on the rear side of swing frames.
Masterlcd card was engineered to visualize the system information on touch screen interface. The operator interface of EXFIRE360 consist of an 8″ graphical touch screen display, 22 leds for the status indication, 24 function keys, a UBS port for panel configuration. Its basic function is the clear indication of the status of inputs and outputs.
4,3″ Touch-screen display that shows the status (Alarm, trouble, disabled, test, normal) of devices, according to EN54-2, EN12094, EN54-4 standards. This display provides immediate and intuitive information of inputs and outputs with additional submenus witch can be accessed by pressing the relevant touch-screen icons.
EX8SI card operation is monitored by a humidity and temperature sensor; these values are shown on the touch‐screen operator interface (ModLcd) of the module. The card provides eight 4‐20 mA supervised inputs and seven open collector outputs, which can be associated to prealarm, alarm and fault warning conditions of the supervised inputs. Pre‐alarm and alarm thresholds, line disablement and operating modes of each input (single or cross zoning, dual steps) are programmable with Protection software.
Loop card controls a loop circuit with the ESP range of analogue addressable fire detection products. In practice it behaves like a small autonomous control panel that can indicate trouble and alarm conditions that may occour on the controlled loop. The highest number of devices is 127 points for each loop. All conditions of the devices are sent to the EXFIRE360 card and to the main CPUs of the panel. These act as the logic solver, thus trasmitting the command of the actuators to the EXLOOP card.
Once powered on, the EXFIRE360 card checks the number and IDs of the devices connected to the signalling line circuit.
The board manages 8 digital input lines (channels 1-8) that can assume only the states of on or off. On the front panel there is a display that shows the status of the inputs (input active or inactive). The inputs of EX8D I / O are continuously monitored by the Central adapting the states of the outputs according to the logic default values. If connection input is not monitored, it is recommended the use of the board only for non-critical type or safety-related applications. The board is particularly suitable for interfacing with other stations or with other field boards, concentrators, etc. ..
The EXFIRE360 card has two inputs EX2GSI analog 4-20mA redundant with two thresholds set by programming tab, 7 programmable open collector warning, alarm and Fault for each line input and two relay with supervisees rated current 2A for blocks of gas valves, etc.. This board can be connected to the following types of transducers: explosiveness sensors, toxicity sensors, oxygen sensors, temperature sensors, generic 4-20mA sensors. The channels are tested in a continuous way during operation. At the start main signals are inhibited for 45 sec., To allow the line current to stabilize.
The combined statement is dedicated to ex6ev-c automatic extinguishment and is certified in compliance with uni en12094-1. the composed set of lines of input and output to achieve in the process of complete discharge. When the two boards are programmed to manage switch off the front display becomes unique, creating a single integrated board. The lcd touch screen presents the state of all the lines of input and output which are monitored for open and short circuit.
The board 6 controls the output lines and is capable of delivering for each output a current of 2 amps at 24Vdc. The line control is executed only when it is deactivated and can be configured individually for each line in the following ways:
2.2 REVERSE POLARITY
It consists in the loading in the rest condition a voltage of reversed polarity compared to normal. This system is not able to control the efficiency of the load as the reverse voltage is blocked by a diode in series before the load and allows to effectively control all the loads of resistive or capacitive (optical plates electronic hearing). In this mode, the EXFIRE360 card is able to detect both the fault for opening that the short-circuit fault of the line.
2.3 CURRENT CONSUMPTION
In this case in the rest condition is made to circulate a current of about 2 mA through the load. This system in addition to the line also controls the efficiency of the load and is therefore suitable for all loads of the inductive type (solenoids, coils). In this mode, the EXFIRE360 card is able to detect the fault for opening of the line and the short circuit. On board there are two SPDT programmable with different functions. These relays are configurable as normally de-energized or normally energized. Selecting the mode normally energized, the condition of anomaly is signaled even in case of power failure of the board.
The interface cboard is designed to handle various EXMULTIBUS solution EXFIRE360 sending system information (alarms, faults, disabled, exclusions, general information on the power supply, all that is interfaced with the control). This board is unique it manages 2 inputs TX-RX fiber optic, 2 serial RS-232, 2 RS-485 serial and 2 Ethernet ports. The board manages a set of protocols.
The EXFIRE360 card is a card EX8RO to 8 free relay C-CN-NO, which activates the second programmable logic.
It can then enable each of the 8 outputs independently associating to events and states that occur in the central or other cards that are activated by remote control (other central or monitoring system).