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PAD-4 Installation, Operation and Maintenance Manual
2.6.4
Class A (Style Z) Input/Output NAC Wiring
Figure 2-13 shows how to wire for Class A (Style Z) input and output supervision. Use in/out wiring
methods for proper supervision. Note: MIN: 22 AWG, MAX: 12 AWG.
Class A (Style Z) Output Notification Circuits
The configuration shown in Figure 2-13 shows two, 3-amp devices wired as Class A (Style Z) circuits.
When you are using the outputs as Class A (Style Z) circuits, loop the wiring back to the corresponding
circuit pair. For Class A (Style Z) wiring, no external EOL is necessary since it is built into the board.
PAD-4-CLSA Module
The PAD-4-CLSA module provides connectivity to two circuits wired as Class A (Style Z). Refer to the
PAD-4-CLSA Installation Instructions, P/N 315-050254, for more information.
Class A (Style Z) Supervised Input Circuits
The configuration shown in Figure 2-13 shows Class A (Style Z) supervised wiring from a fire alarm
control unit to the PAD-4 board. Pay close attention to the polarities when wiring the unit and follow
these requirements:
When wiring to terminal 1-, you must use two separate wires. Do not loop a single wire or twist two
conductor wires together.
Do not use notification appliances on Class A (Style Z) circuits connected for input. The PAD-4 will
detect voltage across the input circuits, but is not designed to pass the added current load from notifica-
tion appliances.
TB11
TB12
1+ 1-
1
2+
2-
2
COM
1
1
INPUT 1
INPUT 2
24VDC/VFW
7mA MAX.
SUPERVISED BY
FIRE ALARM
CONTROL UNIT,
POWER LIMITED
.
14
TB13
NC
NC COM NO
1
+
IN
-
NOTE: THIS CLASS USES
-
OUT
+
Class A (Style Z) Supervised Input/Output Connections
_
_
+
+
+
NAC3A
TB1
1
1
PAD-4-CLSA
TB14
_
_
+
+
NAC1B NAC2B (NAC1A)
1
NOTIFICATION APPLIANCE CIRCUIT
-
+
CLASS A (
SUPERVISED, POWER LIMITED
SEE SIEMENS P/N 315-096363 OR
-
+
FARADAY P/N 315-096363FA FOR
COMPATIBLE DEVICES
POLARITY SHOWN IN
ACTIVATED CONDITION.
2 NAC CIRCUITS
Figure 2-13
_
_
+
NAC4A
TB2
TB15
TB16
_
_
_
+
+
+
NAC3B NAC4B (NAC2A)
AUX PWR SUPPLY
1
1
STYLE Z)
NAC RATINGS:
ALARM VOLTAGE: 24VDC
MAX. ALARM CURRENT: 3A
MAX. RIPPLE: 0.1 VAC
MAX. STANDBY CURRENT: 1.0mA
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