ADDENDUM TO:
VISTA-40, VISTA-50P, VISTA-50PUL 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: 1. 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/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 98. Bell supervision is normally disabled (factory default response type for zone 98 is "00" - no response) and must be enabled for household fire or combination household fire/burg installations by assigning response type 05 to zone 98, 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 98 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.
K3500 rev B 4/99