SCU 800
d-LIST Control Unit
The sensor control unit SCU 800 is the central
supervisory element for the d-LIST-system. It provides
up to two d-LIST sensor cables with power, performs
the cyclic addressing of the connected sensors every
10 seconds, acquires the temperature values
measured by each sensor and evaluates the data with
reference to various criteria.
A fire alarm is generated if either a given maximum
threshold is exceeded, or if an increase in temperature
takes place within a certain time (differential
evaluation). The two thresholds (set-points) can be set
individually for each of the attached sensor cables.
The measurement resolution of 0,1° gives the system a high sensitivity. The tried and tested algorithms used in
the evaluation eliminate false alarms due to natural temperature variations.
Alarms are indicated by LEDs on the front-panel and via floating contacts to a fire terminal station (fire control
panel), host computers or other transmission systems. Hereby, alarms generated by the two sensor cables are
signalled individually.
Resetting takes place via an external signal from the fire terminal station or by pressing the front-panel mounted
reset button.
The serial RS-232 interface can be used for programming and setting of system parameters. LISTEC
®
GmbH
offers the terminal software LISTterm 8 for this purpose.
For the visualisation of the system status, message- and temperature-lists, as well as a graphic display of the
temperature and alarm data, LISTgraph II and the Data Management Unit DMU 600 is available.
A LIST®controller can be used to connect and control several SCU 800 from a central point via a RS-485
interface.
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