GE Security EST3 Installation And Service Manual page 144

Centralized audio applications
+
16
IN
Circuit pair 1
Earth
GND
8
To earth
ground
Polarity is not
important
From UL/ULC
listed 24 VDC
fire alarm panel
4 3 2 1
Black [2]
Red
Figure 4-6: URSM wiring
4.12
– – – –
+ +
+
3-2-1
15 14 13 JP1 12 11 10 9
OUT IN OUT
Circuit pair 2
GFD
LED1 LED2
Trouble/GF Contacts
Power
NC COM NO
7 6 5 4 3 2 1
UL/ULC listed
47 K ohm EOL
(+)
Data in
From signature
(–)
controller or
previous device
UL/ULC listed
47 K ohm EOL
1
C
G
CONT 5A RES.240AC
1725S DC 24V
A410-367396-13
JAPAN 692NA
C
G
CONT 5A RES.240AC
1725S DC 24V
A410-367396-13
JAPAN 692NA
TB2
TB1
[1] [2]
(+)
Data in
(–)
TB2
8 7
SIGA-CT1
4 3 2 1
TB1
Audio risers from
banked apmplifiers
URSM
2 3 4 5 6 7 8
CHANNEL 2 CHANNEL 1
TELEPHONE
TROUBLE TROUBLE
25V AUDIO
70V AUDIO
CHANNEL 2
[1] [2]
8 7 6 5
SIGA-CT2
4 3 2 1
(+)
Data out To next device
(–)
EST3 Installation and Service Manual
(+)
Data out
To next device
(–)
[2] [3]
9 10 11 12 13 14
TB1
TELEPHONE
25V AUDIO
70V AUDIO
CHANNEL 1
Wiring notes
[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