GE Security EST3 - Page 158

Centralized audio applications
4.26 EST3 Installation and Service Manual
Typical
Speaker
Circuit:
UL/ULC
Listed
47K EOL
(Class B Only)
Ω
TB2
TB4
- +- +
Style Y (Class B)
[3bwire3.cdr]
Style Z (Class A)
Only
DATA OUT (+)
CH1 (INPUT 1) RISER OUT (-)
CH1 (INPUT 1)
RISER IN (-)
CH1 (INPUT 1) RISER OUT (+)
CH1 (INPUT 1)
RISER IN (+)
DATA IN (+)
DATA OUT (-)DATA IN (-)
To Next Device
To Next Device or
URSM Supervisor
y
Module
From Signature Controller
o
r
P
r
e
vi
o
u
s
D
e
vi
c
e
From ATP
4
8
16 14
3
7
15 13
2
6
12 10
1
5
11 9
TB1
TB3
JP1
Figure 4-18: Single channel Class A wiring, SIGA-UM Module