Sigma XT Ancillaries

Hold Off Unit

• The K91000M10 Hold Off Unit provides a robust and convenient point to apply a temporary hold to release of fire protection extinguishant release. The robust push-button is shrouded to prevent accidental operation and is coloured to comply with the requirements of BS7273-1.
• Housed in an attractive surface mounting single gang enclosure, the unit is suitable for flush mounting to a standard single gang back box.

Extract Switch

• The K13520M10 Extract unit provides a convenient and secure means to operate extract fan plant associated with the fire protection extinguishing system. The “901” key is common to many fire detection and protection control panels and is retained in the operated position. The robust enclosure allows for either surface mounting or mounting to a single gang flush box.

Main/ Reserve Switch

• The K13480M10 Main/ Reserve switch provides a convenient and secure means to operate a switch to reserve extinguishing system agent where such provision is made as a back up to the main agent. The “901” key is common to many fire detection and protection control panels and is removable in either position. The robust enclosure allows for either surface mounting or mounting to a single gang flush box.

Abort Unit

• The K13470M10 Abort unit provides a highly visible point to enable an immediate abort of a fire protection extinguishant release.
• The large red, domed pushbutton latches when pressed and requires a twist action to release.
•  The robust enclosure allows for either surface mounting or mounting to a single gang flush box.

Sigma Si Ancillary PCB

• The Sigma XT Ancillary Board is compatible with all Sigma XT control panels which have operating software version SIGXT_11A. HEX or above.
• The board provides volt free normally open contacts allowing control of sub-systems and plant remotely from the main panel over a two wire data bus.
• Mains powered, boxed Ancillary boards require only a two core data cable from the main control panel. 24V DC versions require an additional two cores for power either from the main panel or from another 24V DC source.
• Up to 7 Ancillary boards can be connected to a control panel and each is allocated an address from 1 to 7 using a binary coded DIL switch. The total length of the data cable from the main panel to the last repeater must not exceed 1200 metres.
• A mixture of status units and Ancillary boards, up to a maximum of 7 of each type, can be connected to the serial data bus.