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OPE-KBSPEC-0091-C

1601 W. DEER VALLEY ROAD, PHOENIX, AZ 85027   |   

T.

 800-552-5669   |   

F.

 623-687-2290   |   INFO@KNOXBOX.COM   |   

KNOXBOX.COM

© Knox Company. All rights reserved.

1. 

The KnoxVault 4400 Tamper Alert is designed to be 

connected to an existing alarm system and should be 

installed only by a qualified alarm technician.

2. 

Position KnoxVault on wall so wires from alarm panel 

protrude into box through hole (A) in back plate. See 

Figure 1, 2 and 3.

3. 

Bolt KnoxVault to wall, following directions provided in 

mounting instructions. 

 

 

 

 

 

IMPORTANT

Keep Tamper Alert switch hole (B) clear of caulk, debris 

or other foreign material, otherwise the Tamper Alert 

may not operate.

4. 

Door Tamper Alert switch:

  Screw the two spacer shafts 

to screw holes, then screw door Tamper Alert to the end 

of the spacer shafts with provided screws as shown in 

Figure 1. (Door Tamper Alert switch used in both the Recess 

and Surface Mount KnoxVault 4400.) 

Rear Tamper Alert switch:

 Align rear Tamper Alert plunger 

in back plate, hole (B), as shown in Figure 1. Check length 

of plunger and, if necessary, adjust plunger screw to give 

proper travel. Check plunger contact by GENTLY pressing 

the bracket flush against the back plate. (Rear Tamper Alert 

switch only used in the Surface Mount KnoxVault 4400.) 

 

CAUTION

Do not bottom out Tamper Alert. If the rear Tamper Alert 

adjustment screw protrudes too far, the rear Tamper Alert 

switch will break when screws are tightened.

Use of an ohm meter is recommended to assure that switch 

trips (0 ohms – for red/green wire, open for yellow wire) 

when Tamper Alert switch is GENTLY pushed flush against 

the back plate.  
Secure the rear Tamper Alert switch to the back plate with 

the provided screws. 

5. 

Connect Tamper Alert wires to building alarm. Alarm wiring 

must be pulled back through the alarm wire opening (A) to 

prevent interference with door locking mechanism. Green 

and Red wires must be secured tightly so that if box is 

removed, wires will be broken in the process, thereby 

causing alarm activation. In cases where yellow wires are 

used, the yellow wires should be loosely secured so that if 

box is removed, the wire can pull about an inch to allow the 

Tamper Alert switch to close, causing an alert before the 

wires break.

NOTES:

A. 

Electrical: maximum 24 V, 50 mA.

B. 

Red and Green wires indicate Normally Open (N.O.) Switch 

(Closed when KnoxVault is secure)

C. 

Yellow wires indicate Normally Closed (N.C.) Switch 

(Open when  KnoxVault is secure)

Figure 1 

Backplate shown without housing for clarity

Figure 2

Figure 3

Wiring Diagram

KNOXVAULT® 4400 

TAMPER ALERT INSTALLATION INSTRUCTIONS

Tamper Alert switch 

mounting screws (4)

Rear Tamper

Alert switch

(red wire)

Alarm wire

opening (A)

Adjust screw to 

correct height so that 

plunger is depressed 

when door is closed

Door Tamper Alert 

switch (green wire)

KnoxVault

mounting holes (5)

A

All mounting holes

are 7/16" diameter (5)

Alarm wire

opening (A)

Mounting holes

for key hooks (4)

Door Tamper Alert switch

mounting holes (2)

Rear Tamper 

Alert switch 

mounting holes

(2)

A

B

Rear Tamper Alert 

switch hole (B)

INSIDE VIEW

A

B

Tamper Alert switch

mounting screws (4)

Rear Tamper

Alert switch

(red wire)

Alarm wire

opening (A)

Door Tamper

Alert switch

(green wire)

Rear Tamper

Alert switch hole

(B)

Spacer shaft (2)

Adjust screw to correct height so 

that plunger is depressed when 

KnoxVault is mounted. Do not 

bottom out Tamper Alert switch.

1

2

Door Tamper Alert switch

Green Wires

to Security Alarm Panel

1

2

Rear Tamper Alert switch

Red Wires

to Security Alarm Panel

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