MAN1813-9
52
20
Appendix E: Information on the Obsolete Tone Generator
The original version is the 302-491B, which 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).
20.1.1
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
E
V
A
C
A
L
E
R
T
NE
5534
5534
NE
LK1
+
Q3
D1
+
Q6
+
+
+
+
+
S W 1
68
H
C
7
0
5
J2
IC1
IC3
SPEECH
VR4
T
O
N
E
VR3
T
O
N
E
VR1
LED1
LED2
RL1
TX2
TX1
CN1
c
a
IC2
LM7815
IC7
LM7805
IC8
+
Q4
Q5
SPEECH
VR2
X1
IC5
68
H
C
7
0
5
J2
IC4
S W 2
+
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 32: 302-491B / 154-0076 Signal / Speech Generator
Summary of Contents for Ampac EV3000
Page 60: ...MAN1813 9 56...
