ADEMCO VISTA-128B Guia de Configuração descarregar pdf (Página 2)

K3500-3 7/98

ADDENDUM TO: VISTA-128B

INSTALLATION INSTRUCTIONS

This Installation Instruction Addendum covers changes made to the above Ademco VISTA panels to

support new UL985 and UL1023 requirements.

POWER LIMITING

All outputs are now power-limited as per UL985/UL1023. The auxiliary power and polling loop output

current ratings remain unchanged. The on-board PTC circuit breaker that protects the bell output was

changed to comply with the power-limiting requirement and, as a consequence, the bell current rating

must be reduced from 2.8A max to 1.7A max at 12V

to avoid false tripping of the new PTC. There

are additional restrictions on bell current rating depending on the type of installation, as follows:

For Household Fire or Combination Household Fire/Burg Installations: The total current drawn

from the auxiliary power, polling loop, and bell outputs combined must not exceed 750mA in order

to comply with the battery independence requirements in UL985.

2. For UL1023 Household Burg (or VISTA-50PUL/VISTA-50PULADT UL609 Mercantile Burg)

Only Installations: Total current drawn from the bell output may be up to 1.7A. A battery must be

installed to supply combined auxiliary power, polling loop, and bell current in excess of 750mA.

TELEPHONE OVERVOLTAGE PROTECTION

The telephone tip and ring inputs now have overvoltage protection in accordance with UL1459, as

specified in UL985/UL1023. On-board PTC circuit breakers were added to these inputs to protect

against overvoltage.

BELL SUPERVISION

The panel now supports supervision of the bell wiring as specified in UL985. The panel will annunciate

bell supervision status on system zone 970. Bell supervision is normally disabled (factory default

response type for zone 970 is "00" - no response) and must be enabled for household fire or

combination household fire/burg installations by assigning response type 05 to zone 970, which will

provide a trouble indication regardless of whether the panel is armed or disarmed.

When supervision is enabled, the panel monitors the bell wiring for open- and short-circuit faults while

the bell is inactive. The panel will provide a trouble indication when there is an open circuit in the bell

wiring that disconnects all indicating devices from the panel, or when there is a short circuit between

the Bell+ and Bell- terminal wiring (or between the Bell+ terminal wiring and earth ground, provided

that the panel's earth ground Terminal 30 is connected to a proper earth ground).

When the supervision feature is used, only polarized fire-indicating devices may be wired to the panel's

bell output. Non-polarized burglary-indicating devices may be used only when wired to the panel's bell

output using a polarizing diode (two 2A diodes supplied) as shown in Diagram 1 below. Table 1 below

lists some compatible indicating devices.

When the supervision feature is used, the minimum alarm load on the bell output must exceed 5mA at

12V for proper supervision operation. If using a device with a high-resistance trigger input such as a

voice siren driver (e.g., 745 x 3), do not supervise the bell output. In this case, cut the blue jumper in

the upper left-hand corner of the control panel PCB, and assign zone 98 a response type “00.” The siren

driver module must be mounted in the panel's cabinet and, for household fire installations, must

independently supervise its siren speaker wiring.

On panels that support partitioning, bell supervision zone 970 is declared to exist in Partition 1 for

keypad display, event logging, and dialer reporting purposes. Contact ID Code 321 will be used to

report bell supervision faults.

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