Siemens PAD-3 User Manual

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Siemens Building Technologies, Inc. Siemens Building Technologies, Ltd.

8 Fernwood Road 2 Kenview Boulevard

Florham Park, New Jersey 07932 Brampton, Ontario L6T 5E4 Canada

P/N 315-099082-9

Fire Safety

Model PAD-3

Distributed Power Module NAC Expander

Installation, Operation, and Maintenance Manual

Table of Contents

Questions and Answers:

D
Denise RomeroAug 3, 2025
What to do if OUTPUT LEDs (DS1, DS2, DS3, DS4) are lit on Siemens Extender?
- J
  jhendersonAug 3, 2025
  If the OUTPUT1, OUTPUT2, OUTPUT3, or OUTPUT4 LEDs are lit, it indicates a problem with the associated NAC (Notification Appliance Circuit). This could be due to the NAC being open (greater than 49K ohms), shorted (less than 18K ohms), or experiencing an overcurrent condition (tripping with greater than 3.7Amps). To resolve this, test the associated NAC circuits for opens and shorts.
C
Christina PatrickAug 9, 2025
What to do if AUX. P.S. LED (DS5) is lit on Siemens Extender?
- G
  Gina SaundersAug 9, 2025
  If the AUX. P.S. LED is lit, this indicates an overcurrent condition on the auxiliary power output, specifically a trip with greater than 3.7Amps. You should measure the current on the auxiliary power output to diagnose and resolve this issue.
M
mitchelljeffreyAug 15, 2025
Why is the GRND LED (DS6) lit on my Siemens Extender?
- C
  Crystal BarberAug 15, 2025
  If the GRND LED is lit, it means one or more external field connections are shorted to earth ground (less than 40K ohms). You should check the external field connections for shorts to ground.

Siemens PAD-3 Specifications

General

Brand	Siemens
Model	PAD-3
Category	Extender
Language	English

Summary

DESCRIPTIONS

1.1 General Design Features

Overview of the PAD-3's design features, including inputs and outputs.

1.3 General Specifications

Provides technical specifications for environmental, power, and circuit parameters.

INSTALLATION

2.1 Mounting the Enclosure

Instructions for physically mounting the PAD-3 enclosure in its location.

2.4 Terminal Descriptions and Electrical Ratings

Defines terminals and their associated electrical specifications for connections.

2.5 Wiring the PAD-3

Comprehensive wiring instructions for connecting the PAD-3 to various systems.

CONNECTION TO CONTROL UNITS

SAMPLE APPLICATIONS

4.1 Notification Appliance Power Applications

Example configurations for powering notification appliances from the PAD-3.

4.2 Door Holder Applications

Wiring examples for using the PAD-3 in door holder release systems.

PROGRAMMING

5.1 DIP SWITCH SETTINGS

Guides on configuring the PAD-3 using its 10-position DIP switch.

5.2 JUMPER SETTINGS

Information on configuring the PAD-3 using its jumper settings.

REFERENCE DATA

6.2 BATTERY SIZE CALCULATIONS

Methodology for calculating required battery capacity for system operation.

TROUBLESHOOTING

8.1 LED INDICATORS

Explanation of the LED indicators and their fault/normal status meanings.

8.3 TROUBLE CONDITIONS

Description and probable causes for various trouble conditions indicated by LEDs.

BATTERY MAINTENANCE

GLOSSARY

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