15073 OWNER’S MANUAL
447179 Issue 1 Rev. A
11
2.5.3
Style Y (Class B) Input/Output NAC Wiring
Figure 2-6 shows how to wire for Style Y (Class B) input and output supervision. Use in/out wiring
methods for proper supervision. Compatible notification appliances are listed in Section 7.
Style Y (Class B) Output Notification Circuits
Figure 2-6 shows four, 1.5 amp devices wired as Style Y (Class B) circuits.
Place a 24K ohm EOL resistor (provided) at the end of each loop to enable notification output supervision
when using all output as Style Y (Class B) notification circuits. The 24K EOLs must be wired to the
terminals whether or not you are using all output terminals.
Style Y (Class B) Supervised Input Circuits
Figure 2-6 shows Style Y (Class B) supervised wiring from a fire alarm control unit to the 15073 board.
Use an EOL resistor as shown to enable notification input supervision.
Figure 2-6. Style Y (Class B) Supervised Input/Output Connections
6 7 8 9
2
1
3
Input 1
5
4
Input 2
AUX
18
NAC
12
Trouble
Relay
NAC
10
11
15
14
13
NAC
NAC
17
16
+
-
19
-
+
Class B notification
output from fire panel
EOL
(SEE CONTROL UNIT
INSTALLATION
INSTRUCTIONS)
24K 1/2W
P/N 10807
FARADAY
See Owner's Manual for
Supervised, Power Limited
Notification Appliance Circuit
+
+
Compatible Devices
Style Y, Class B
-
-
MAX. STANDBY CURRENT: 1.0mA
MAX. WIRE VOLTAGE DROP: 1.5VDC
MAX. ALARM CURRENT: 3A
ALARM VOLTAGE: 24VDC NOMINAL
MAX. RIPPLE: 0.1 VAC
NAC RATINGS:
Polarity shown in
activated condition.
UNIT, POWER LIMITED
FIRE ALARM CONTROL
SUPERVISED BY
6mA MAX.
18-30VDC / VFW
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