Ampac EV3000 - Signal;Speech Generator; Signal Generator Settings; Standby; Speech Generator

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EV3000 INSTALLATION & COMMISSIONING
8.5.2 Signal/Speech Generator
The 302-491B is designed to produce the alert and evacuation tones and speech messages required
for an evacuation system to Australian Standards AS1670.4 or NZS4512. Tones are digitally
produced by microcontrollers for high stability and accuracy. Speech messages, which may be
installed on either or both tones, are microprocessor controlled but stored using the Information
Storage Devices (ISD) Direct Analogue Storage Technology (DAST). Outputs from the card are low
impedance to allow the card to drive 100 AMPAC EV3000 amplifiers (i.e. 40W and 120/240W).
8.5.3 Signal Generator Settings
SW 1 settings
Switch
Off
On
1-1
Evacuation message off
Evacuation message on
1-2
Standard = AS1670.4
Standard = NZS4512
SW 2 settings
Switch
Off
On
1-1
Alert message off
Alert message on
1-2
Standard = AS1670.4
Standard = NZS4512
SETTING
EVAC
SETTING
ALERT
MESSAGE
ALERT
MESSAGE
EVAC
POWER
SYNC
302 4910B TONE/SPEECH GENERATOR
EVAC ALERT
NE
5534 5534
NE
LK1
+
Q3
D1
+
Q6
+
+
+
+
+
SW1
68HC705J2
IC1
IC3
SPEECH
VR4
TONE
VR3
TONE
VR1
LED1
LED2
RL1
TX2
TX1
CN1
c a
IC2
LM7815
IC7
LM7805
IC8
+
Q4
Q5
SPEECH
VR2
X1
IC5
68HC705J2
IC4
SW2
+
IC6
+ +
+
+
EVAC SIGNAL /
SPEECH LEVEL
ALERT SIGNAL /
SPEECH LEVELS
ON
1 2
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
ON
1 2
Figure 8: 302-491B / 154-0076 Signal / Speech Generator
8.5.4 Standby / Speech Generator
This board is the STANDBY to the main signal speech generator board. Should the main board fail,
the STANDBY board is automatically switched into circuit and the TONE fault indicator on the front
panel is illuminated.