DSC PC255O Especificações descarregar pdf (Página 4)

to supply AC power to the PC2550. The transformer

should not be connected to an outlet that is controlled by

a switch. If AC failure occurs it is displayed as a trouble

on the keypad (see “Keypad Functions [✱][2] Trouble

Conditions”). It can also be transmitted to the monitoring

station as a trouble condition (see “Programming Guide

[✱][8]” sections [12] and [13] for alarm and restore codes

and section [20] for AC transmission delay).

Auxiliary Power Terminals “AUX” and “GND”

The auxiliary power supply can be used to power motion

detectors and other devices requiring 11 V

DC. 400 mA 11

VDC is available from the “AUX” (positive) and “GND”

(negative) terminals when the PC2550 is used with one

keypad. For each additional keypad the auxiliary supply

rating must be reduced by 60 mA. The auxiliary supply is

fused with the keypad supply at 1 amp. Auxiliary fuse

failure transmission can be sent (see [✱][8] sections [12]

and [13]).

Switched Auxiliary Power Terminals

“SW AUX” and “GND”

The switched auxiliary supply can be switched off

momentarily from the keypad (see “Keypad Commands

[✱][4]”). The “SW AUX” terminal is positive and the

“GND” terminal negative. The 400 mA auxiliary supply

rating must be reduced by any current taken from the

switched auxiliary supply. The switched supply shares the

same fuse as the auxiliary supply.

Bell/Siren Terminals “BELL [+]” and “BELL [-]”

These terminals are for powering bells or other devices

requiring a steady output voltage on alarm. The bell

output is fused for 5 amps. When connecting sirens

(speakers with siren driver already built-in), be sure to

observe the correct polarity. Connect the positive lead to

the “BELL [+]” terminal and the negative lead to the

“BELL [-]” terminal.

If no siren or bell is used, connect a 1000 ohm resistor

between “BELL [+]” to “BELL [-]”. The bell/siren alarm

output is pulsed (1 second on 1 second off) when an

alarm is created by the [F] keypad zone, by the FIRE

zone, or when the Bell Pulse option is enabled in section

[18] light 2.

Keypad Terminals “RED”, “BLK”, “YEL” and “GRN”

Connect the four colored wires from the keypads to these

terminals. When connecting more than one keypad,

connect in parallel across the keypad terminals at the

control panel (i.e. all reds wires together, all blacks

together, all yellows together and all greens together).

The keypad red and black power supply terminals are

fused through the auxiliary fuse.

Programmable Output Terminal “PGM OUT”

The operation of the Programmable Output depends

upon which option is selected in the programming table.

See the “Programming Guide” section [30] for a list of

options for the “PGM OUT” output. The “PGM OUT” is a

50 mA maximum switch to ground. A 100 ohm current

limiting resistor is connected in series. A small relay, a

buzzer or other DC operated device may be connected

between the 11 V

DC “AUX” (positive) terminal and the

“PGM OUT” (switched negative) terminal on the main

board.

Auxiliary Input Terminal “AUX IN” (also KEY ARMING)

The “AUX IN” input terminal is a normally open 24 hour

zone. It can be programmed from the keypad to be silent

or audible. There is no display on the keypad for the

“AUX IN” input. An alarm on this input is created by

applying a positive voltage or by closing a contact

between the “AUX IN” terminal and the positive auxiliary

supply. See “Programming Guide [✱] [8]” section [11] for

programming the alarm and restoral codes.

The “AUX IN” terminal can also be used as a momentary

key arming/disarming input. See “Programming Guide”

section [30] for a list of options for the “AUX IN” terminal.

The keyswitch arming feature must be implemented using

a UL listed device.

”FIRE” Zone Input

The “FIRE” zone is a supervised (normally open alarm

initiating contact) end-of-line resistor circuit designed to

accept “Latching” four-wire smoke detectors.

(See “Fire Circuit Installation Diagram”.)

On alarm, (fire zone shorted) the bell output will pulse the

signal to indicate that the fire zone has been activated.

Alarm memory and transmission by the digital

communicator is delayed 30 seconds. If the alarm is

acknowledged, by pressing the [#] key before the 30

second delay has expired the signals will silence and the

transmission will be aborted. If the alarm is not

acknowledged and the 30 second delay expires, the fire

memory latches and the transmission cannot be aborted.

If the smoke detector is not restored to normal after

signal has silenced, the signals will resound after 90

seconds, and 30 seconds after that, the communicator

will transmit. If the signals resound, they may again be

silenced, [#] key, and the communicator will be aborted if

silence occurs within the 30 second delay period.

To restore the smoke detector to normal, clear all

products of combustion from the detector and reset the

detector by pressing [✱] and then holding down [4] for 2

or 3 seconds. This action will remove power from the

smoke detector and if it is clear of smoke, the detector

will return to normal. If the detector is still in alarm, the

signals will sound immediately and the above sequence

will repeat.

For an open on the FIRE zone, the keypad sounder will

beep twice every 10 seconds and the “Trouble” light will

show on the keypad. The communicator will transmit the

trouble condition if programmed for trouble transmission.

The audible trouble signal may be silenced by pressing

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