Amseco BMC-33B User Guide

BMC-33B

High Security Balanced

Magnetic Contact

BMC-33B 10/2004*Due to continuous development of our product line, specifications are subject to change without notice.

Description

The BMC-33B anti-defeat magnetic contacts are

uniquely designed and constructed to make defeating

almost impossible. The switch housing contains special-

ly arranged reed switches. The reed switches are pre-

set in a biased format with ring magnets, producing a

symmetrical magnetic field. The magnet layout is

designed with a combination of three polarized mag-

nets. This specially designed switch and magnet combi-

nation produces a perfect symmetrical magnetic field in

a balanced condition, as if no magnet field existed. Any

attempt to bypass or defeat the BMC-33B with an exter-

nal magnet will cause magnetic fields to be imbalanced,

thus causing an alarm condition.

Dimensions: inches (mm)

Features

· 1-3/8 ~ 3” operating gap

· Anodized aluminum housing

· Form “C” contact type

· 24” armored cable

· 360 degrees mounting capabilities

· No field adjustment required

· Corrosion resistance

· Rhodium plated contacts

*N.C. contacts are closed with magnet engaged. *N.O. contacts are open with magnet engaged.

Switch

Magnet

Model Number

BMC-33B

Max.

Switching

Current

Magnet

Type

Mounting

Method

Breakdown

Voltage

Operating

Temperature

Range

32°F ~ 120°F

(0°C ~ 49°C)

0.2 A

Alnico 6

screws

Ordering Information

Operating

Gap

1-3/8” ~ 3”

3VA

Contact

Rating

Contact

Type

N.O./ N.C.

Max.

Carry

Current

0.5 A

200V DC Min.

CORPORATE OFFICE & WAREHOUSE

2081 Craig Road
St. Louis, Missouri 63146
[phone]
Fax: [phone]
Local: [phone]

www.amseco-kai.com / [e-mail]

3“ Gap Min.

Install in this range

Do Not Install in this range

1-3/8” ~ 3“ Gap

0 ~ 1-3/8” Dead Zone

0.7 (18)

3.46 (88)

0.5 (13)

Red Dot Mark
(Array same direction)

1.35

(34.5)

4 (104)

3 (76)

C-Bracket

Magnet

Switch

24 (609)

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