15073 OWNER’S MANUAL
447179 Issue 1 Rev. A 12
2.5.4 Style Z (Class A) Input/Output NAC Wiring
Figure 2-7 shows how to wire for Style Z (Class A) input and output supervision. Use in/out wiring
methods for proper supervision. Compatible notification appliances are listed in Section 7.
Style Z (Class A) Output Notification Circuits
The configuration shown in Figure 2-7 shows two, 3-amp devices wired as Style Z (Class A) circuits.
When you are using the outputs as Style Z (Class A) circuits, loop the wiring back to the corresponding
circuit pair. For Style Z (Class A) wiring, no external EOL is necessary since it is built into the board.
Style Z (Class A) Supervised Input Circuits
The configuration shown in Figure 2-7 shows Style Z (Class A) supervised wiring from a fire alarm control
unit to the 15073 board. Pay close attention to the polarities when wiring the unit and follow these
requirements:
When wiring to terminal 2 and 5 on TB2, you must use two separate wires. Do not loop a single wire or
twist two conductor wires together.
Do not use notification appliances on Style Z (Class A) circuits connected for input. The 15073 will detect
voltage across the input circuits, but is not designed to pass the added current load from notification
appliances.
Figure 2-7 Style Z (Class A) Supervised Input/Output Connections
6 7 8 9
2
1
3
Input 1
54
Input 2
AUX PS
18
NAC
12
Trouble
Relay
NAC
10 11 151413
NAC NAC
1716
+ -
19
In
Out
+
-
-
+
2
Correct
2
2
Twisting
Two wires
Looping
single wire
Incorrect Class A notification
outputs from fire panel
Two separate
wires
+
-
UNIT, POWER LIMITED
FIRE ALARM CONTROL
SUPERVISED BY
6mA MAX.
18-30VDC / VFW
Style Z, Class A
NOTE: THIS STYLE USES
activated condition
Polarity shown in
Compatible Devices
Supervised, Power Limited
See Owner's Manual for
+
-
2 NAC CIRCUITS
Notification Appliance Circuit
+
-
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:
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