Apollo PP2209 Informasi Produk - Halaman 2

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TONE FREQUENCY AND VOLUME

CONTROL

The tone frequency of the sounders is pub-

lished in a separate document available for

Apollo Fire Detectors PP2203.

ADDRESSING

The integrated base sounder responds to its

own individual address set with a DIL switch.

It also responds both to a group address, set

by means of a 4-segment DIL switch and to a

pulsed-mode synchronisation address which

is em bed ded in the unit.

Addresses 1 to 111 are used exclusively for

in di vid u al addresses; addresses 112 to 126 are

used for group ad dress ing, while the synchro-

nisation address, to which all units respond,

is '0'. Any integrated base sounder on a

loop may be freely assigned to a group. The

address for any group must be chosen from

the range 112–126.

Addresses 112–126 may be used as individual

addresses but only if the 4-segment DIL switch

is not used ie,group addressing is disabled.

If the 4-segment DIL switch were set to any

number other than the default 127, a pre-set

analogue value of 4 would be transmitted to

indicate a fault.

The integrated base sounder is normally

polled by its individual address. It responds

as de scribed below (See PROTOCOL BIT

USAGE). If more than one integrated base

sounder is activated it is possible for the

sounders to be out of synchronisation with

the result that the signal in not clear.

To prevent this, it is recommended that the

synchronisation address '0' be sent by the

control panel at regular intervals to align the

internal clock of all sounders. The result is

that the sounders are synchronised with each

other in both 'alert' and 'evacuate' modes.

NB: Units on two or more loops can be syn-

chro nised only if the panel transmits address

'0' to all loops synchronously.

GROUP ADDRESSING

It may be desirable, in alarm conditions, to

switch more than one integrated base sounder

si mul ta ne ous ly. To enable this, sounders may

be controlled as a group and given a group

address which is common to all sounders in

the group. When a device recognises its group

address, it will proc ess the forward command

bits but it will not return any data to the

control panel on that ad dress. If it is re quired

to conﬁ rm the status of the outputs of devices

under group address control, it is necessary

to interrogate all devices in the group at their

individual addresses.

SELF TEST

An important safety feature has been incorpo-

rated into the integrated base sounder: when

it is switched on it tests itself by checking the

actual sound output. If no sound is detected

within 5 seconds of the Integrated Base

Sounder being switched on it will transmit an

analogue value of 1 (= sounder fault) when it

is next polled.

This can also be used during commissioning

or periodical maintenance testing. Simply

activate the sounder for at least 5 seconds

and check the control panel for a fault signal.

If none is received, the sounder is working

properly.

PROTOCOL COMPATIBILITY

The sounder will operate only with control

equipment using the Apollo XP95 or Discovery

protocol. The features of the Integrated base

sounder are available only when the sounder

is connected to a control panel with the

ap pro pri ate software.

PROTOCOL BIT USAGE

The output (or forward command) bits from

the control panel have the following function:

Output bit 2 is used to apply the required

address mode — group addressing or indi-

vidual addressing.

Group addressing is selected by setting

output bit 2 of the individual address to

logic 0 on two or more consecutive cycles

and output bit 2 of the group address to

logic 1 on two or more consecutive poll-

ings. All other output bit 2 combinations

result in the application of the individual

address mode.

Whichever address mode — individual or

group — is applied in any polling, the use

of the other output bits is identical:

When output bit 1 is set to logic 1 on two or

more consecutive pollings, the 'alert' tone

is sounded.

When output bit 0 is set to logic 1 on two

or more consecutive pollings, the 'evacu-

ate' tone is sounded. The sounder will also

operate continuously if both output bit 1

and output bit 0 are set to logic 1 on two or

more consecutive pollings.