24
Operational Set up Philosophy
The Tocsin 750 controller forms the operational core of an addressable gas detection
system.
ALL elements of the system such as detectors, highway hubs, relay outputs etc have
addresses on the system.
During set up and commissioning the inputs and outputs to and from the Tocsin 750 are
defined with their addresses.
The diagram below shows a typically hierarchy.
Channel Number
on Tocsin 750
Controller
25
Associated
Detector Address
15
Alarm Level 1
15
Alarm Level 2
25
Alarm Level 3
50
In this example for this particular channel (25)
on the Tocsin 750 controller the gas detection
readings are coming from detector 15. This is
setup in the SENSOR SETUP menu.
The required alarm levels are set up in
the ALARM SETUP menu. Three alarm
levels are possible for each channel as
AL1,AL2 and AL3. The type of alarm is
also setup in this menu as one of either:
RISING ALARM
RISING LATCHING ALARM
FALLING ALARM
FALLING LATCHING ALARM
Alarm on rising gas level once set point is
exceeded. Alarm resets after gas level is below
the alarm point.
Alarm on falling gas level once level is below set
point. Alarm resets after gas level is above the
alarm point.
Alarm on falling gas level once level is below set
point. Alarm must be manuallyreset after gas
level is above the alarm point.
Alarm on rising gas level once set point is
exceeded. Alarm must be manually reset after
gas level is below the alarm point.
These options are configured in the RELAY SETUP
menu which allows relay alarm outputs to be assigned
to particular channels or groups of channels
For complete details on alarm options see the Alarm
Setup Menu section later in this manual.
Relay Address
103
Relay Type
RISING
Sensor
25
Associated Detector
Cable
Relay Cable
1