GE Security EST3 - Page 144

Centralized audio applications
4.12 EST3 Installation and Service Manual
G
C
CONT 5A RES.240AC
1725S DC 24V
A410-367396-13
JAPAN 692NA
G
C
CONT 5A RES.240AC
1725S DC 24V
A410-367396-13
JAPAN 692NA
TB1
1 2 3 4 5 6 7 8 9 10 11 12 13 14
URSM
130102
TELEPHONE TELEPHONE
CHANNEL 2
TROUBLE
CHANNEL 1
TROUBLE
25V AUDIO 25V AUDIO
70V AUDIO 70V AUDIO
CHANNEL 2 CHANNEL 1
URSM
Red
Black
TB1
UL/ULC listed
47 K ohm EOL
1243
[2]
[1] [2]
[1] [2]
[2] [3]
(+)
(–)
Data out
To next device
(+)
(–)
Data in
[1] Supervised
[2] Power limited
[3] Nonpower-limited
4. The GFD and CT1 must
be installed in the same
enclosure
5. Jumper J1 on the GFD
should be set to the
2-3 position
Wiring notes
7
7
8
8
1
1
2
2
3
3
4
4
56
UL/ULC listed
47 K ohm EOL
+
+
+
+
TB2
TB2
TB1
––––
Earth
GND
Power
Circuit pair 1 Circuit pair 2
IN IN
JP1
LED1 LED2
OUT
3-2-1
OUT
Trouble/GF Contacts
NC NOCOM
To earth
ground
Polarity is not
important
5
13
1
9
7
15
3
11
6
14
2
10
8
16
4
12
GFD
SIGA-CT1
SIGA-CT2
From UL/ULC
listed 24 VDC
fire alarm panel
(+)
(–)
Data out
(+)
(–)
From signature
controller or
previous device
To next device
Audio risers from
banked apmplifiers
Data in
Figure 4-6: URSM wiring