• The Sigma A-Si range of status indicators provides detailed status information for Sigma A-XT releasing control equipment.
• All models provide high brightness, LED indication of Manual Only, Automatic and Manual, Abort Operated, Disabled, Imminent and Released conditions. Models are also available with zonal fire indicators and a common trouble indicator.

• High brightness LED’s
• Detailed indication of the status of the Control Panel
• Supervised data connection
• Countdown shows time remaining until release
• Manual only and Automatic & Manual mode select
• Four-wire connection (data and power)
• Protected dual action manual release switch option
• Option for zonal fire and trouble indication with buzzer
• Robust, high quality enclosure
• Easy access to terminals
• Remote Auto/Manual door interlock input (supervised)
• Remote Abort input (supervised)
• Internal trouble diagnosis indicators

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Sigma A-SI

• Construction: 1.2mm mild sheet steel
• IP Rating: IP30
• Colour - lid & box: Red (optional grey)
• Power supply: 21 to 30 V DC
• Maximum current draw: 0.07A
• Max. number of status units: 7
• Quiescent current: 0.033A
• Cable capacity: 2.5mm² per terminal
• Monitored inputs end of line resistor: 6K8 0.5W Resistor
• Monitored inputs normal threshold: 8K ohm to 1K ohm
• Monitored inputs trigger threshold: 700 ohms to 100 ohms
• Monitored inputs short circuit threshold: 99 ohms to 0 ohms
• Data connection: Two wire RS485 connection (max 1200 metres)

• UL & FM Approved version also available