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CA824 Installation manual

PHYSICAL AND LOGICAL SYSTEM LEVEL

Any security system established on CA824 principles should be regarded as a physical and logical
entity.
At its physical level it comprises of all modules, together with all their resources – inputs and outputs.
Limitations at this level consist of the number of modules, which can be connected to the bus – no more
than 15. As to the resources – there are no limitations at this level to the number of inputs or puts. In
practice, this would mean that the actual number of modules connected to the bus could be backed up
by more inputs and outputs than those maintained at the logical level.
The logical level of the system includes the zones, their types, their attached areas, etc; the program-
mable outputs (PGM) together with their performance logics; the user codes with all their adjustments;
the specified areas, etc. In other words, the logical level allocates the resources at a physical level and
configures performance of the system as a security station.
Zones are limited up to 24 logical numbers, whereas programmable outputs (PGM) are up to 16 logical
numbers. the logical number 00 is used to initialize the resources of any arbitrary module, which are not
to be utilized.
The modules engaged by the system can be activated in “double zoning” performance mode or deacti-
vated in that mode. The “double zoning” mode is universal for all devices and means that two sensors
can be connected to any input of a given device. Hence, 2*N sensors can be connected to a module
which has N number of inputs. Two menu inputs correspond to one physical input. These are located at
address 8.0.xx.0, where device inputs can be configured and therefore 2*N zones can be attached to
module inputs in programming mode.
Where the double zoning option has not been activated, only one sensor can be connected to one input,
thus attaching only one zone to this input, when in programming mode. Therefore, where one module
has N inputs in this mode, no more than N sensors can be connected to it.
Only one zone can be connected to one input, irrespective of whether the double zoning mode is active
or not.
Figure 2 in Item 4.3 – Zone Hardware – describes how to connect sensors.

Module inputs will be processed only after they are assigned a number for the zone they are connected
to. This is done separately for each individual module at address 8.0.xx.0, Inputs config

XX designates

the number of the module from the list of devices included in the system. The parameters of the respec-
tive zone also have to be assigned at address 4.1.

This address is inaccessible for modules without inputs.

Elaboration on Table 1. The columns indicate which inputs of the menu, rows 2 & 3, correspond to a
given physical input in row 1. In Figure 2, input numbers for Zone 1 are in row 2. Input numbers for Zone
1 in Figure 2 are in row 3. For example – 1 and N+1 inputs from the menu at address 8.0.xx.0 corre-
spond to first physical input. Input number 1 corresponds to Zone 1 and input number N+1 corresponds
to Zone 2.

Table 1. Correspondence between the physical inputs and the input numbers of the menu located at address
8.0.xx.0 for double zoning mode.

Physical input number

Input number from the menu for Zone 1

N+1

Input number from the menu for Zone 2

N+2

.....

2*N

Table 2. Correspondence between the physical inputs and the numbers of the inputs in the menu located at address
8.0.xx.0 for deactivated double zoning mode.

Physical input number

Input number from the menu

.....