Siemens PAD-3 - Style y (Class B) Input;Output NAC Wiring

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2.5.3 Style Y (Class B) Input/Output NAC Wiring
Figure 2-8 shows how to wire for Style Y (Class B) input and output supervision. Use in/out wiring
methods for proper supervision.
Style Y (Class B) Output Notification Circuits
Figure 2-8 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 outputs 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 2-8 shows Style Y (Class B) supervised wiring from a fire alarm control unit to the PAD-3 board.
Use the control panel’s EOL resistor installed as shown to enable notification input supervision.
6789
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
140-820405
PART NO.
See Owner's Manual for
Supervised, Power Limited
Notification Appliance Circuit
+
+
Compatible Devices
Style Y, Class B
-
-
MAX. STANDBY CURRENT: 1.0mA
MAX. ALARM CURRENT: 3A
ALARM VOLTAGE: 16 -32 VDC
MAX. RIPPLE: 0.1 VAC
NAC RATINGS:
Polarity shown in
activated condition.
UNIT, POWER LIMITED
FIRE ALARM CONTROL
SUPERVISED BY
7mA MAX.
16-33VDC / VFW
AC Fail
20 21
Figure 2-8. Style Y (Class B) Supervised Input/Output Connections