Filter
Top Products
Document No: LT0122 F3200 Installation & Programming Manual
Applications
Issue 2.7 5 July 2001 Page 9-13
USE OF ACTUATORS (CONTINUED)
The maximum number of actuators connected in series in one circuit is dependent on the
cable resistance. The following are estimates for the Metron Protractor and 427354 current
limiter, and are not confirmed by the manufacturer (consult the manufacturer).
Allow: 21V as worst case battery voltage; 6.5V drop for regulator; 2.5V drop per actuator; 1V
drop for diode EOL; 1V per Ohm of cable resistance.
Based on these estimates up to 4 actuators may be fitted to a circuit with up to 3.5 Ohms
cable resistance and a diode EOL.
9.2.5 AVI SIGNS
The AVI is a single, illuminated, 24Vdc warning sign with an internal sounder that produces
AS2220 Alert and Evacuate warning tones. It has two independent sets of lamps (i.e. top
and bottom) and two signal inputs, and can be configured to provide the combinations of
tone and illumination required for Gas Flood warning signs. It can be ordered with one of a
number of standard faceplates with wording such as FIRE ALARM / EVACUATE AREA.
AVIs have three pairs of terminals that accept inputs from the FIP, namely '+24V', 'ALERT-',
and 'EVAC-'. They can be connected and operated in two modes, namely 2-wire and 3-wire.
The typical connection for 3-wire mode has the +VBF supply connected to +24V, with
switched 0V signals to ALERT- and EVAC- respectively.
In 2-wire mode, the +24V terminals are not used. For an EVAC input, the +ve supply is
connected to ALERT- (i.e EVAC+) and the -ve supply (0V) is switched to EVAC-, and vice
versa for Alert. However currently the ME0065-69 arrangements do not support this wiring.
Note the System Inoperative sign is configured and wired in 2 wire mode.
In its present form, multiple AVIs cannot be supervised if they have their tones synchronised.
Multiple AVIs on one circuit require a series diodes to be fitted at each sign (i.e. one per
tone) and two relays (per tone) to allow the circuit to be supervised. See Figures 9.2.5 and
9.2.6. The logic for each relay is shown alongside the relay (note the numbering is different
to Figure 9.2.1).
All signs should be configured for flashing illumination as that attracts attention and saves
power. Note the AVI has incandescent lamps that draw a large current.
The configuration of some commonly used signs is as follows.
Function Illuminate Tone Note
1 Top: FIRE ALARM Top Alert
Bottom: EVACUATE AREA Both Evac
2 Top: FIRE ALARM Top Alert
Bottom: DO NOT ENTER Both Evac
3 Top: DO NOT ENTER Top Evac a.
Bottom: XXXX GAS DISCHARGE Both Evac a.
4 Both: XXXX SYSTEM INOPERATIVE Both None
Options for XXXX include: CO2; INERGEN; FM-200; NAF S III.