Honeywell SE 3708C Technical Manual
SE 3708C
UNINTERRUPTABLE
POWER MODULE
TECHNICAL
MANUAL
5452 Betsy Ross Drive
Santa Clara, CA 95054-1184
(408) 727-5170
FAX (408) 727-6707
P/N 66108566001, Rev. B
SE 3708C Uninterruptable Power Module
SE 3708C ii 66108566001-Rev. B
SE3708C Uninterruptable Power Module Manual
Hardware Warranty
Limited Warranty
Westinghouse Security Electronics (WSE) warrants to the original user the Equipment manufactured by
WSE as described herein (the Equipment) to be free from defects in material and workmanship for a period
of one year from the date of purchase by such user or fifteen (15) months from the date of shipment from the
factory, whichever is sooner, provided:
I WSE has been notified within such period by return of any alleged defective equipment free and
clear of any liens and encumbrances to WSE or its authorized Dealer at the address specified,
transportation prepaid, and
II the Equipment has not been abused, misused, or improperly maintained and/or repaired during
such period; and
III such defect has not been caused by ordinary wear and tear; and
IV such defect is not a result of voltage surges/brownouts, lightning, water damage/flooding, fire,
explosion, earthquakes, tornadoes, acts of aggression/war, or similar phenomena; and
V accessories used as an integral to WSE Systems have been approved by WSE (e.g., coax,
batteries, etc.); and
VI the Equipment has been installed, the installation supervised, or installation tested by an
unauthorized WSE Dealer.
WSEs Proximity Command Keys are warranted for 5 years. WSE shall at its option, either repair or
replace, free of charge, the Equipment found, upon WSEs inspection, to be so defective, or if agreed upon,
refund the purchase price, less a reasonable allowance for depreciation, in exchange for the Equipment.
Magnetic Stripe cards are warranted as described by the manufacturers warranty.
WSE MAKES NO OTHER WARRANTY, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY
OF MERCHANT ABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE
DURATION OF THE EXPRESSED WARRANTY PERIOD AS SET FORTH ABOVE.
WSES MAXIMUM LIABILITY HEREUNDER IS LIMITED TO THE PURCHASE PRICE OF THE
EQUIPMENT. IN NO EVENT SHALL WSE BE LIABLE FOR ANY CONSEQUENTIAL, INDIRECT,
INCIDENTAL, OR SPECIAL DAMAGES OF ANY NATURE ARISING FROM THE SALE OR USE OF THE
EQUIPMENT.
Some states do not allow limitations on incidental or consequential damages or how long an implied
warranty lasts, so the above limitations may not apply. This warranty gives specific legal rights, however,
other rights which vary from state to state, may pertain.
66108566001-Rev. B iii SE 3708C
SE 3708C Uninterruptable Power Module
NOTICE
The SE 3708C Uninterruptable Power Module manufactured by Westinghouse Security Electronics has
been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions herein, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
SE 3708C iv 66108566001-Rev. B
SE3708C Uninterruptable Power Module Manual
TABLE OF CONTENTS
SECTION 1 INTRODUCTION
1.1 PURPOSE .................................................................................................................................. 1-1
1.2 SCOPE ....................................................................................................................................... 1-1
1.3 CONFIGURATIONS ................................................................................................................... 1-2
1.4 GENERAL INFORMATION......................................................................................................... 1-2
1.4.1 System Overview ........................................................................................................ 1-2
1.4.2 System Applications.................................................................................................... 1-2
1.5 SAFETY INSTRUCTIONS.......................................................................................................... 1-3
SECTION 2 DESCRIPTION
2.1 PHYSICAL DESCRIPTION ........................................................................................................2-4
2.2 FUNCTIONAL DESCRIPTION ................................................................................................... 2-4
2.2.1 Low Voltage Switching Power Supply Circuitry............................................................ 2-5
2.2.2 Battery Disconnect Circuitry ........................................................................................ 2-5
2.2.3 Control and Indicators Circuitry ...................................................................................2-5
2.2.4 400 Hz Inverter ........................................................................................................... 2-6
2.2.5 Power On/Off Switch and Pilot Light ........................................................................... 2-6
SECTION 3 INSTALLATION
3.1 LOCATION and MOUNTING ...................................................................................................... 3-1
3.2 WIRING REQUIREMENTS ........................................................................................................ 3-1
3.2.1 ACU Cable Connections ............................................................................................. 3-2
3.2.2 Lock Power Wiring Connections .................................................................................3-3
3.2.3 Battery Cable Connections ......................................................................................... 3-5
SECTION 4 WIRING REQUIREMENTS
4.1 CUSTOMER SERVICE.................................................................................................. 4-1
4-2 TROUBLESHOOTING GUIDE ...................................................................................... 4-1
APPENDICES
APPENDIX A SPECIFICATION .......................................................................................................A-1
APPENDIX B SE 3708 VERSIONS ................................................................................................. B-1
66108566001-Rev. B v SE 3708C
SE 3708C Uninterruptable Power Module
SE 3708C vi 66108566001-Rev. B
SECTION 1
INTRODUCTION
This manual provides basic information on the installation and operation of the Westinghouse Security
Electronics (WSE) SE 3708C Uninterruptable Power Module. This information includes specifications, a brief description of the operation, controls and indicators, relevant installation data, and a
troubleshooting guide.
NOTE: Changes or modifications to the equipment
described herein which are not expressly
approved by Westinghouse Security Electronics
can void authority of the user to operate the system.
1.1 PURPOSE
The purpose of this manual is to provide the information required for installing, operating, and
troubleshooting the SE 3708C Uninterruptable Power Module.
1.2 SCOPE
The information provided in this manual is intended for personnel who will be installing the SE 3708C,
placing the unit in operation, and performing the troubleshooting procedures described herein.
Repairs to the SE 3708C shall be limited to those that can be performed without removing the unit from
its case with the exception of replacing fuses.
The information contained in this manual assumes that the reader is familiar with access control and
alarm monitoring technology and standard installation practices. Thus, the manual is not intended to
be a complete system installation guide or system service manual for dealers or end-users. As such,
the manual is a supplementary guide, providing only that information and data which is unique to the
SE 3708C.
The information provided in this manual is not intended to either conflict with or supplement the specific
building codes, electrical codes, or safety codes to which any given installation must conform.
This manual is organized as follows:
Section 1 . . . . . . . . INTRODUCTION
Section 2 . . . . . . . . DESCRIPTION
Section 3 . . . . . . . . INSTALLATION
Section 4 . . . . . . . . MAINTENANCE
Appendix A . . . . . . SPECIFICATIONS
Appendix B . . . . . . SE 3708 VERSIONS
66108566001-Rev. B 1-1 SE 3708C
Introduction SE 3708C Power Supply Manual
1.3 CONFIGURATIONS
The SE 3708C Uninterruptable Power Module is identified by four different part numbers depending
upon the lock power output and the AC power input. These part numbers and the Power Module
configurations are shown in Table 1-1.
Table 1-1. SE 3708C Configurations
Part Number Lock Power Input Power
92370811112 +12 VDC 50/60 Hz, 120 VAC
92370812124 +24 VDC 50/60 Hz, 120 VAC
92370813212 +12 VDC 50/60 Hz, 230 VAC
92370814224 +24 VDC 50/60 Hz, 230 VAC
1.4 GENERAL INFORMATION
General information on the SE 3708C system operation and system applications is provided below.
1.4.1 SYSTEM OVERVIEW
The SE 3708C Uninterruptable Power Module is a true uninterruptable power supply in that it can take
power either from the power lines or from external storage batteries which are always on-line in case
the power fails. Normally, when AC power is available, the batteries are always kept charged; when
the power fails, the batteries take over immediately until AC power is restored.
To accomplish this, the 3708C is actually two power supplies working together. The first, or primary
power supply, provides low voltage for locks, for battery charging, and for the secondary power supply
which, in turn, produces all system voltages. During power outages, the batteries continue to provide
the low voltage needed for locks and the secondary power supply.
1.4.2 SYSTEM APPLICATIONS
The 3708C can provide enough power to run an access control system consisting of the following
components:
• Up to 2 Access control unit(s).
• Up to 16 Multiple Switch Monitor(s) (SE 774) or Door Switch Monitor(s) (SE770).
SE 3708C 1-2 66108566001-Rev. B
Installation Introduction
• Up to 16 SE 2814/15 Sensors
• One or two batteries (12 VDC or 24 VDC).
• One or two SE 778 or 778A Annunciator/Control Module(s) powered by the ACU in 800-
series systems.
• One Modem (or similar accessory).
• Several low current locking devices or similar accessories (see below).
As shown in Table 1-1, the SE 3708C is available in four versions, 3708C-112, 3708C-124, 3708C212, and the 3708C-224. The 3708C-112 and 3708C-212 are intended for systems with 12-volt locks.
The 3708C-124 and 3708C-224 are to be used for systems with 24-volt locks. Since the batteries
provide lock voltage during power outages, the lock voltage requirement will also determine the battery
voltage requirement. Since the 12-volt 3708C-112/212 and the 24-volt 3708C-124/224 are set and
adjusted to their respective voltages at the factory, they cannot be converted in the field.
At facilities without emergency power systems, the SE 3708C can provide limited emergency power
to maintain access control. The total amount of power it can deliver, however, is fixed, and should not
be exceeded. Doing so may blow fuses, or damage the unit. Therefore, any devices in addition to
those listed above may cause the 3708C to be damaged or operate incorrectly.
As noted, installation personnel should be careful to avoid overloading the system. However, due to
the variety of locks and system configurations available, it is impossible to state exactly how many locks
the SE 3708C is capable of driving. However, for a typical system configuration consisting of one
Access Control Unit controlling several doors, the continuous lock power load should not exceed 4
amps at 12 VDC or 3 amps at 24 VDC. If additional lock power is required, or the system includes two
access control units, some or all lock power will probably need to come from an external power supply
instead of the SE 3708C. It is important to remember that any external power supply must function
independently and must not be paralleled with the SE 3708C.
Consequently, heavy lock power loads, monitoring modules such as motion detectors, glass break
detectors, infrared sensors, and smoke detectors should not be powered by the SE 3708C; they should
have separate power supplies.
1.5 SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS. THIS MANUAL CONTAINS IMPORTANT SAFETY INSTRUCTIONS.
CONSERVER CES INSTRUCTIONS. CETTE NOTICE CONTIENT DES INSTRUCTIONS
IMPORTANTES CONCERNANT LA SECURITE.
CAUTION: A BATTERY CAN PRESENT A RISK OF ELECTRICAL SHOCK OR BURN FROM HIGH
SHORT-CIRCUIT CURRENT. OBSERVE PROPER PRECAUTIONS.
66108566001-Rev. B 1-3 SE 3708C
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