EDWARDS SYSTEMS TECHNOLOGY EST2, Installation Sheets Manual

Page: 26 / 120

NAC1/B NAC1/A SOURCE NAC2/B NAC2/A SOURCE
+ _ + _ + _ + _ + _ + _
TB1 TB2
SIGA/A
SIGA/B
+
+
_
_
Expander Module Loop
TB3
270213.CDR REV 3.0 Page 2 of 2
FIELD WIRING
1
2
3
4
5
6
7
Notification Appliance Circuits (NACs) / Signature Data Circuit SDC Wiring
Notes
Supervised.
Contacts shown with system power applied.
For ee the
.
maximum wire resistance, s Installation and Service
Manual
No T-taps when wired as a Class A (Style 7) circuit.
Supervised and power-limited.
15 k resistor Required for Class B (Style Y) wiring only.
W
Power-limited when connected to a power-limited source. If the
source is nonpower-limited, maintain a space of 1/4 inch (6.4
mm) from power-limited wiring or use FPL, FPLP, FPLR, or an
equivalent in accordance with the National Electric Code.
Legend
Notification appliance
Signature Series
smoke detector
Signature Series
module/pull station
2
2
2
2
1
1
3
UL/ULC
Listed
15 k
EOL
W
UL/ULC
Listed
15 k
EOL
W
3
NAC 1
NAC 2
Class A (Style Z)
configuration only.
N
A
C
s
Class A (Style 7)
configuration only
5
4
S
D
C
+ + + + +
_ _ _ _ _
NAC 2 Source: listed fire alarm
power supply or amplifier
NAC 1 Source: listed fire alarm
power supply or amplifier
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