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Ensures articles are safe and without risk to health when properly used, requiring trained personnel for installation and maintenance.
Panel operation preventing release activation by automatic detection devices.
Panel operation allowing release activation by automatic detection or manual intervention.
Indicates general fire condition from auto detection zones not configured for release.
Indicates general alarm for auto detection in manual mode, no auto release.
Indicates 1st stage auto gas release activation via automatic detection.
Indicates imminent auto release via co-incidence alarms and auto detection.
Confirms successful automatic extinguishant release after countdown.
Manual activation bypasses 1st stage, triggers 2nd stage release.
Confirms successful manual extinguishant release after countdown.
Indicates active fault conditions like sounder or power faults on the panel.
Allows disabling functions to prevent false activations during maintenance or testing.
Allows testing of auto detection devices without activating the system.
Guides on viewing active events and accessing the event log for diagnostics.
Procedures for disabling detection zones and extinguishant release outputs.
Instructions for disabling manual release functions and panel inputs.
Procedures for disabling relay outputs, sounder outputs, and monitored inputs.
Enables delay or non-delay of 1st stage sounder outputs upon alarm.
Basic panel functionality for any user, including manual release initiation.
Additional panel controls accessible via key-switch or passcode.
Procedures for resetting the panel and selecting auto/manual operating modes.
The Sigma ZXT is an extinguishant release control panel designed for fire detection and gas extinguishing systems. It serves as a central control and indicating equipment, compliant with EN54-2, EN54-4, and EN12094-1 standards, ensuring reliable operation in various fire safety scenarios. The panel's primary function is to monitor fire conditions and, when necessary, initiate the release of an extinguishant agent, either automatically or manually, to suppress fires.
The Sigma ZXT panel operates in two main modes: Manual Only Mode and Auto Mode. In Manual Only Mode, the release of extinguishant is exclusively triggered by manual intervention, preventing automatic activation from detection devices. This mode is indicated by the mode key-switch being in the "Manual" position, with the corresponding LED illuminated and the LCD displaying "MANUAL" status. This ensures that gas release occurs only when explicitly initiated by an operator.
In Auto Mode, the extinguishant release can be instigated by either automatic detection devices or manual intervention. This mode is indicated by the mode key-switch being in the "Auto" position, with the "Auto" LED illuminated and the LCD displaying "MANUAL & AUTO" status. This dual activation capability provides flexibility and redundancy in fire suppression.
The panel features comprehensive fire detection capabilities, monitoring multiple zones for fire conditions. When a zonal fire is detected in Auto Mode, the panel indicates this with an urgent buzzer sound, illuminated Fire and relevant Zone Fire LEDs (flashing for 1st stage, solid for 2nd stage), and detailed fire information on the LCD. For extinguishant release, the panel implements a two-stage activation sequence. The 1st Stage Extinguishant Release, triggered by specific zonal fires, indicates a "Pre-activated/Activated" state with flashing LEDs and an urgent buzzer. The 2nd Stage Extinguishant Release, often requiring co-incidence alarms or manual activation, signifies an "imminent" release with illuminated LEDs, an urgent buzzer, and a countdown timer on the LCD.
Upon successful extinguishant release, the panel confirms the action with illuminated Fire, Zone LEDs, "Pre-activated/Activated," and "Released" LEDs, an urgent buzzer, and a "DISCHARGING" message with a remaining time countdown on the LCD. This clear indication ensures that personnel are aware of the gas release and can follow site procedures.
The Sigma ZXT also monitors various system conditions, including faults and disablements. Fault conditions, such as sounder faults or power faults, are indicated by an illuminated "General Fault" LED, specific fault LEDs, a continuous buzzer, and detailed fault information on the LCD. Disablements, used during maintenance or testing, are indicated by an illuminated "General Disablement" LED, specific disablement LEDs, a continuous buzzer, and the active state of the zone on the LCD.
The panel's user interface is designed for clarity and ease of operation, with distinct LEDs for alarms, general status, and extinguishant controls, complemented by an LCD for detailed information. The mode key-switch allows for easy toggling between Manual Only and Auto modes, providing operational flexibility based on site requirements.
For manual extinguishant release, the panel incorporates a dual-action mechanism to prevent accidental activation. Users must pull down a yellow "Manual Extinguishant Release" flap to expose a red push-button, which then initiates the 2nd stage release sequence. This design enhances safety by requiring deliberate action.
The panel includes several user controls accessible at different access levels. Access Level 1 provides basic functionality, such as lamp testing, silencing the buzzer, and initiating manual release. The lamp test involves pressing and holding a button to check all LEDs and scroll through a full-color sequence on the LCD. The silence buzzer button stops the local panel buzzer, with the buzzer LED illuminating, and the buzzer will resound for any new events.
Access Level 2, requiring a passcode or the enable key-switch, offers additional controls that can impact the panel's performance. These include silencing alarms (for 1st stage notification devices), re-sounding alarms, and performing various disablements. The enable key-switch, requiring a 901 key, provides a secure method to access this level.
The Sigma ZXT incorporates several features to facilitate maintenance and testing while ensuring system integrity. The "Test Mode" allows automatic detection devices to be tested without activating the extinguishant system. In this mode, the "Test" LED and relevant Zone Test LEDs illuminate, the buzzer sounds continuously, and the LCD displays detailed test information. This prevents false activations during routine checks.
The panel also allows for the disablement of various functions during maintenance periods to prevent unwanted activations or signalling. These disablement options include:
All disablements are indicated by illuminated "General Disablement" and specific disablement LEDs, a continuous buzzer, and detailed information on the LCD. The system emphasizes the importance of clearing disablements once maintenance is complete and warns against enabling zones with active fire or fault conditions.
The panel also offers an "Event Log" that stores up to 1000 events, providing diagnostic information that can be scrolled through on the LCD. This log is invaluable for troubleshooting and understanding past system behavior. Additionally, the "View Active Events" function allows users to scroll through details of multiple active events, providing a synopsis of current system conditions.
The ability to enable or disable sounder delays allows for customization of alarm notification timing, which can be programmed by a qualified engineer. This feature provides flexibility in how quickly sounder outputs activate after an alarm, either immediately or after a pre-determined delay.
General| Touchscreen | No |
|---|---|
| Type | Fire Alarm Control Panel |
| Approval | EN54, LPCB |
| Display | LCD |
| Communication Ports | RS-485, Ethernet |
| Certifications | LPCB |
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