Magza Safety Sentry User manual

Installation Instructions
P-616
819-0454
Safety Sentry™
Electronic Breakaway Switch
An Altra Industrial Motion Company
®
DIST. AUTORIZADO
MEX (55) 53 63 23 31
QRO (442) 1 95 72 60
MTY (81) 83 54 10 18
[email protected]

2Warner Electric • 800-825-9050 P-616 • 819-0454
Parts List
Mounting hardware included with the Safety
Sentry Breakaway Switch kit:
Qty Part
1 Chain/lanyard with snap hook
1 2-1/2" Bolt
1 1-5/8" Sleeve
2 Eyebolts
5 ockwashers
5 Nuts
Failure to follow these
instructions may result in product damage,
equipment damage, and fatal injury to
personnel.
Introduction
The main purpose of any trailer breakaway switch
is to automatically engage the electric trailer
brakes should the trailer become detached from
the towing vehicle. In addition to this basic
function, your Safety Sentry Breakaway Switch will:
1. Test the battery under load for approximately
10 volts minimum.
2. Illuminate its green light to indicate that the
trailer battery and breakaway switch are
operating properly.
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DIST. AUTORIZADO
MEX (55) 53 63 23 31
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3
Warner Electric • 800-825-9050 P-616 • 819-0454
Mounting
Note the general layout in Figure 1 as you
proceed through the mounting instructions.
Refer to the parts list, page 2.
1. Drill a 9/32-inch hole for an eyebolt in a
convenient structural member on your
towing vehicle chassis near the hitch (not
on the hitch assembly).
Mount the eyebolt, with the eyebolt pointing
toward the breakaway switch, using two
1/4-inch nuts with lockwashers. Tighten
securely. See Figure 2.
Figure 2
Towing Vehicle Eyebolt Mounting
2. Position the breakaway switch on a
horizontal or vertical surface of the trailer
tongue or A-frame. The pin in the switch
must point towards the towing vehicle.
The switch must be positioned far enough
forward so the lanyard will reach the towing
vehicle.
It must also be set back far enough to allow
an eyebolt to be mounted to the tongue in
front of the switch.
3. Drill a 9/32-inch hole through the tongue for
mounting the switch.
Insert the furnished metal sleeve into the
mounting hole in the switch. The sleeve
allows the switch to pivot so the lanyard
stays aligned with the towing vehicle.
Bolt the switch to the tongue using the bolt,
nut, and lockwasher provided.
Figure 1 - Typical Layout
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DIST. AUTORIZADO
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4Warner Electric • 800-825-9050 P-616 • 819-0454
4. Refer to Figure 3 for correct location for
mounting the second eyebolt.
Drill a 9/32-inch hole for the eyebolt. Secure
with two 1/4-inch nuts and two lockwashers.
This eyebolt is necessary so that the pin will
be pulled straight out from the breakaway
switch if the trailer should become
disconnected.
5. Insert the breakaway switch disengagement
pin into the breakaway switch.
6. Disconnect the snap hook (it is not
permanently attached) from the chain end
of the lanyard assembly. Save the hook
and its attachment clip.
7. Thread the lanyard, chain end first, through
the eyebolt mounted on the trailer tongue.
8. Determine the correct length for the lanyard.
The lanyard is the correct length if the
following conditions are satisfied:
Condition 1: If trailer should become
disconnected, the lanyard must become
taut and pull the pin out of the breakaway
switch before the trailer safety chains
become taut.
Condition 2: If the trailer should become
disconnected, the lanyard must become taut
and pull the pin out of the breakaway switch
before the towing vehicle-to-trailer electrical
wiring becomes taut. Making the electrical
wires longer than the safety chains is a
convenient way to accomplish this.
Condition 3: During normal towing
operation, the lanyard must NOT become
taut enough to pull the pin out of the
breakaway switch when turning a corner.
Condition 4: During normal towing
operation, either straight or while turning
corners, no chains or wiring should be
allowed to drag on the ground.
Adjust the lanyard to the right length by
removing the individual chain links.
The lanyard, if installed correctly, now
extends from the switch, with the pin
inserted into the switch, through the eyebolt
on the trailer tongue, and attaches to the
eyebolt on the towing vehicle.
9. eaving the lanyard threaded through the
eyebolt on the trailer tongue, secure the
snap hook to the end chain link. Use pliers
to close the snap hook attachment clip
completely around the end of the snap hook.
10. Fasten snap hook to the towing vehicle
eyebolt.
Figure 3 - Trailer Tongue Eyebolt Mounting
®
DIST. AUTORIZADO
MEX (55) 53 63 23 31
QRO (442) 1 95 72 60
MTY (81) 83 54 10 18
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5
Warner Electric • 800-825-9050 P-616 • 819-0454
Electrical Connection
Recommended Parts ist for Customer Wiring:
Item Qty Description
1. 6' No. 12 AWG insulated wire (stranded) blue
2. 6' No. 12 AWG insulated wire (stranded) black
3. 6' No. 12 AWG insulated wire (stranded) white
4. 6' No. 12 AWG insulated wire (stranded) red
5. 2 1/4-inch bolts, length suitable for the type of trailer tongue used
6. 2 1/4-inch nuts
7. 4 washers for 1/4-inch bolt
8. 2 lockwashers for 1/4-inch bolt
9. 1 roll of electrical tape
10. 3 wire nuts or insulated line connectors (binding screw type) for three No. 12 AWG wires
11. 1 socket and plug connector with a minimum of three poles capable of accepting
No. 12 AWG wire
12. 1 12 volt wet cell battery (100 amp-hour max.)
Figure 4 - Wiring Diagram
Refer to the wiring diagram shown in Figure 4 as
you follow the electrical connection instructions
below. Plan ahead by starting with long wires.
All wires must be a least No. 12 AWG and
insulated. The final length of the wires from the
trailer, including the connector, should be longer
than the safety chains.
(Note: Refer to Mounting, Item 8, Condition 2).
The trailer battery must be 12 volts and have
adequate capacity to meet all legal requirements
of the state in which the trailer will be towed.
Use a wet cell storage battery with a maximum
rated capacity of 100 amp-hours.
Solder connections are preferable for attaching
two wires together. If crimp-type connectors
are used, make sure they are crimped tightly.
All such connections should be taped with
electrical tape to prevent corrosion and short
circuiting.
®
DIST. AUTORIZADO
MEX (55) 53 63 23 31
QRO (442) 1 95 72 60
MTY (81) 83 54 10 18
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6Warner Electric • 800-825-9050 P-616 • 819-0454
Your breakaway switch has four wires: white,
blue, black, and red. They should be connected
as follows:
1. Ground – White Wire
Attach the white wire to the trailer frame
adjacent to the switch using a 1/4-inch bolt,
nut, two washers, and one lockwasher. Be
sure the frame area is bare metal and free of
rust. (See Figure 5)
Figure 5 - Ground Connections
The wire must be long enough for the switch
to swivel freely after the connection to the
trailer frame has been made. Make sure the
final connection is tight.
Connect the trailer battery ground (-) to the
trailer frame, also using 1/4-inch bolt, nut,
two washers, and one lockwasher as shown
in Figure 5.
Make sure the final connection is tight.
(Note: The white wire from the switch and
the battery ground terminal may be
connected to one common ground on
the trailer frame if convenient.)
A ground wire should be run from the towing
vehicle battery (-) to the socket at the rear of
the vehicle. From the socket, the ground wire
should be connected to the trailer frame.
(There should now be a total of 3 ground
connections: the breakaway switch white
wire to the trailer frame; the ground side of
the trailer battery to the trailer frame; the
ground side of the towing vehicle battery,
through the socket at the rear of the vehicle,
to the trailer frame.)
2. Bra es – Blue Wire
Connect the blue wire to the positive (+) wire
running to the trailer brakes. Be careful not
to connect to the ground (-) wire leading
from the brakes.
3. Trailer Battery Charging – Blac Wire
Warner Electric recommends that a charging
circuit be used to maintain the trailer battery
in a fully-charged condition.
a. If a charging circuit is used, it must be
connected through the Safety Sentry switch
using the black wire as shown in Figure 4.
Connect the black wire from the switch,
through the polarized connector, to the
output side of the battery isolator. If a
battery isolator is not used, connect the
wire directly to the towing vehicle battery (+)
terminal.
Failure to connect the
charging circuit through the switch will
result in incorrect operation of the switch.
b. If a charging circuit is not used, cut off the
black wire from the Safety Sentry close to
the switch's plastic housing. Insulate the
exposed end of the wire with a recognized
electrical insulating tape or equivalent. This
will prevent the exposed lead from
grounding.
Failure to cut off and
insulate the black wire when no charging
circuit is used could cause an electrical
short circuit. his may deplete the trailer
battery and destroy the Safety Sentry,
completely immobilizing the breakaway
system.
4. Trailer Battery – Red Wire
Connect the red wire directly to the trailer
battery (+) terminal using an appropriate
battery connector.
®
DIST. AUTORIZADO
MEX (55) 53 63 23 31
QRO (442) 1 95 72 60
MTY (81) 83 54 10 18
[email protected]

7
Warner Electric • 800-825-9050 P-616 • 819-0454
Operation
Your Safety Sentry Breakaway Switch should
now be ready for use. Always test the system
before using it to assure that it is in proper
working condition.
Use the following procedure to test the brake
system:
1. Put the towing vehicle in “Park”. Set the
emergency brake if the vehicle has manual
transmission.
2. Couple the plug and socket together.
3. Pull the disengagement pin from the switch.
The green light on the switch will illuminate
for at least 10 seconds if the system is
connected and the battery is functioning
properly.
4. If the green light does not illuminate, use the
following procedure to check the system and
locate the cause of the problem:
a. Check your wiring to ensure all connections
have been made properly. Refer to Figure 4.
Check all connections to be sure they are
tight. Check ground connections to be sure
they are attached to rust-free areas of the
trailer frame. They must be connected to
bare metal surfaces.
Correct any errors which have been made. If
the green light does not illuminate, proceed
with the next step.
b. Use a voltmeter to check the trailer battery
for proper output. The battery must supply at
least 10 volts, with the switch pin pulled
(trailer brakes on), for the green light to
illuminate.
If the voltage is low, the battery should be
charged to a minimum of 10 volts and
checked again with the pin pulled before the
trailer is towed.
The battery will be charged directly from the
towing vehicle while the engine is running. To
accomplish this the pin must be inserted in
the switch.
If the battery does not charge to 10 volts, it
must be replaced.
The green light should now illuminate, or the
trailer brakes must be checked.
c. Check the trailer brake wiring. All brake
magnets should be connected with good
quality connectors and taped to avoid a
possible short circuit.
d. The green light should now illuminate, or the
Safety Sentry should be replaced.
e. As a final check, pull the disengagement pin
on the Safety Sentry and try to pull the trailer
forward with the towing vehicle. If the trailer
brakes are engaged, it will be difficult for the
towing vehicle to move the trailer.
If the trailer and towing vehicle
are connected while parked, prolonged use
of the trailer battery for lights or other
purposes will also drain the towing vehicle
battery. he problem can be avoided by
disconnecting the plug from the socket.
DO NO USE AS A PARKING BRAKE (pin
removed). Prolonged activation will discharge
the battery and cause the brakes to release.
®
DIST. AUTORIZADO
MEX (55) 53 63 23 31
QRO (442) 1 95 72 60
MTY (81) 83 54 10 18
[email protected]

Warranty
Warner Electric C warrants that it will repair or replace (whichever it deems advisable) any
product manufactured and sold by it which proves to be defective in material or workmanship
within a period of one (1) year from the date of original purchase for consumer, commercial or
industrial use.
This warranty extends only to the original purchaser and is not transferable or assignable without
Warner Electric C’s prior consent.
Warranty service can be obtained in the U.S.A. by returning any defective product, transportation
charges prepaid, to the appropriate Warner Electric C factory. Additional warranty information
may be obtained by writing the Customer Satisfaction Department, Warner Electric C, 449
Gardner Street, South Beloit, Illinois 61080, or by calling 815-389-3771.
A purchase receipt or other proof of original purchase will be required before warranty service is
rendered. If found defective under the terms of this warranty, repair or replacement will be made,
without charge, together with a refund for transportation costs. If found not to be defective, you will
be notified and, with your consent, the item will be repaired or replaced and returned to you at
your expense.
This warranty covers normal use and does not cover damage or defect which results from
alteration, accident, neglect, or improper installation, operation, or maintenance.
Some states do not allow limitation on how long an implied warranty lasts, so the above limitation
may not apply to you.
Warner Electric C’s obligation under this warranty is limited to the repair or replacement of the
defective product and in no event shall Warner Electric C be liable for consequential, indirect,
or incidental damages of any kind incurred by reason of the manufacture, sale or use of any
defective product. Warner Electric C neither assumes nor authorizes any other person to give
any other warranty or to assume any other obligation or liability on its behalf.
WITH RESPECT TO CONSUMER USE OF THE PRODUCT, ANY IMP IED WARRANTIES WHICH
THE CONSUMER MAY HAVE ARE IMITED IN DURATION TO ONE YEAR FROM THE DATE OF
ORIGINA CONSUMER PURCHASE. WITH RESPECT TO COMMERCIA AND INDUSTRIA
USES OF THE PRODUCT, THE FOREGOING WARRANTY IS IN IEU OF AND EXC UDES A
OTHER WARRANTIES, WHETHER EXPRESSED OR IMP IED BY OPERATION OF AW OR
OTHERWISE, INC UDING, BUT NOT IMITED TO, ANY IMP IED WARRANTIES OF
MERCHANTABI ITY OR FITNESS.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation or exclusion may not apply to you. This warranty gives you specific legal rights and
you may also have other rights which vary from state to state.
Changes in Dimensions and Specifications
All dimensions and specifications shown in Warner Electric catalogs are subject to change without
notice. Weights do not include weight of boxing for shipment. Certified prints will be furnished
without charge on request to Warner Electric.
Warner Electric LLC
449 Gardner Street • South Beloit, IL 61080
815-389-3771 • Fax: [phone]
www.warnerelectric.co
An Altra Industrial Motion Company
P-616 • 819-0454 10/07 Printed in USA
®
DIST. AUTORIZADO
MEX (55) 53 63 23 31
QRO (442) 1 95 72 60
MTY (81) 83 54 10 18
[email protected]