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2.5.4
Style Z (Class A) Input/Output NAC Wiring
Figure 2-9 shows how to wire for Style Z (Class A) input and output supervision. Use in/out wiring
methods for proper supervision.
Style Z (Class A) Output Notification Circuits
The configuration shown in Figure 2-9 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 2-9 shows Style Z (Class A) supervised wiring from a fire alarm control
unit to the PAD-3 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 PAD-3 will detect
voltage across the input circuits, but is not designed to pass the added current load from notification
appliances.
Two separate
wires
16-33VDC / VFW
2
7mA MAX.
SUPERVISED
BY FIRE ALARM
CONTROL
UNIT, POWER
Correct
LIMITED
2
Looping
Twisting
Single wire
Two wires
2
2
Incorrect
CAUTION:
For system supervision,
DO NOT USE LOOPED WIRE
UNDER TERMINALS for terminal
2 and 5. Break wire run to provide
supervision of connections.
Figure 2-9 Style Z (Class A) Supervised Input/Output Connections
Input 1
Input 2
AC Fail
1
2
3
4
5
6
7
8
Class A notification
output from fire panel
In
Out
Trouble
Relay
NAC
NAC
NAC
9
10 11
12
13
14
15
16
Notification Appliance Circuit
Style Z, Class A
Supervised, Power Limited
See Owner's Manual for
Compatible Devices
Polarity shown in activated
condition.
NOTE: THIS STYLE USES
2 NAC CIRCUITS
NAC RATINGS:
ALARM VOLTAGE: 16 -32 VDC
MAX. ALARM CURRENT: 3A
MAX. RIPPLE: 0.1 VAC
MAX. STANDBY CURRENT: 1.0mA
14
NAC
AUX PS
17
18
19
20 21
.
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