Kentec Sigma XT+ Extinguishant Coincidence Unit (K21001M2)

The Kentec Sigma XT+ K21001M2 Extinguishant Coincidence Unit (ECU) is a self-contained extinguishant release control unit, designed in accordance with EN 12094-1. It receives activation signals on two supervised inputs from volt-free contacts on other fire detection panels or from addressable output modules. It can also be connected to a Kentec Sigma CP fire panel serial bus and be activated over that link.

The unit can be set for single-input or double-input (coincidence) activation. It has an integral mains-powered power supply and battery charger that meets EN 54-4, and is housed in an H2 size enclosure with room for 7 Ah batteries.

Key features

• Designed in accordance with EN 12094-1, with integral EN 54-4 power supply and charger
• Two monitored activation inputs for volt-free contacts from conventional fire panels or addressable modules; single or double input (coincidence) activation
• Optional connection to the Sigma CP fire panel serial bus
• Extinguishing signal delay of up to 60 seconds and control of flooding time
• Released (flow) signal input and low pressure switch monitoring
• Emergency hold and emergency abort inputs; manual-only mode
• First and second stage sounder outputs, with different signals for pre-discharge and released warnings
• First stage, second stage, extract and fault volt-free changeover contacts
• Two extinguishant release outputs, with a reserve solenoid output configuration option
• Serial connection for up to 7 status units or ancillary boards

Technical specifications

• Product code: K21001M2
• Enclosure: H2 size, 385 (W) x 310 (H) x 110 (D) mm
• Mains supply: 230 V AC 50 Hz +10% / -15% (100 W max.); mains fuse F3A 250 V 20 mm
• Batteries: 2 x 12 V sealed lead acid in series, 7 Ah max. within the enclosure (up to 26 Ah supported in a separate, mechanically coupled battery cabinet)
• Battery charge voltage: 27.6 V DC nominal (temperature compensated); charge current 1.25 A max.
• Current draw in mains fail condition: 60 mA quiescent, 107 mA full alarm
• Aux 24 V output: fused at 500 mA (electronic fuse), 200 mA max. continuous load
• Sounder outputs: 1 x first stage and 1 x second stage, 21 to 28 V DC, fused at 1 A; 1.0 A total over all circuits; EOL 10K resistor
• Extinguishant release outputs (2): 21 to 28 V DC, fused at 1 A; EOL 1N4004 diode
• Release delay: adjustable 0 to 60 seconds in 5-second steps; release duration: adjustable 60 to 300 seconds in 5-second steps
• Relay contacts (fault, first stage, second stage, extract): 5 to 30 V DC, 1 A max. each
• Activation inputs: 6K8 0.5 W end-of-line resistor, triggered by a 470R 1 W resistor
• Status unit/ancillary board connection: two-wire RS485, max. 7 units; status unit power output 21 to 28 V DC, 300 mA max. load
• Cabling: FP200 or equivalent with metal cable glands; terminals 0.5 to 2.5 mm²