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Prosafe Trapped Key Interlock Switches

Exchange Units

Description

The key exchange unit (KEX) is used in an interlocking sequence to

link together other devices in the Prosafe range and caters to more

complex operating sequences.

The operating principle is such that no secondary keys can be

removed from the unit until all primary keys have been inserted,

rotated, and trapped. The primary keys remain trapped until all

secondary keys have been re-inserted, rotated, and trapped.

It is typically used in applications where there is more than one

access way to the hazardous area, and each access way must be open

at the same time. The key exchange unit accomplishes this by

allowing one or more keys to be inserted which then releases

multiple keys out.

A typical process may require a rotary key switch to turn a motor off.

The key from the rotary switch is removed and inserted into a KEX.

The KEX then releases three keys which would allow simultaneous

access to the hazard area through three different gates. This KEX is

described as 1 key in 3 keys out. The keys in are considered primary

codes, so the keys are not included in the KEX. The keys out are

considered secondary codes, so the keys are included.

Features

• A range of off-the-shelf units in various combinations

• 316L Stainless steel construction

• Primary key(s) in release secondary keys simultaneously on

units up to 6 way

• Weatherproof stainless steel dust cap as standard

• Replaceable code barrel assembly

The Prosafe Advantage

Stainless steel

construction.

Specifications

Accessories

Standards

EN292-1&2, EN1088, ISO12100-1&2,

ISO14119, AS4024.1

Category

Cat. 1 per EN 954-1 (ISO 13849-1)

Suitable for Cat. 2, 3, or 4 systems

Approvals

BG, CE marked for all applicable

directives and C-Tick not required

Operating Temperature

-40°C to +200°C (-40°F to +392°F)

Mechanical Operations

100,000

Max. Shear Force to Key

15.1kN (3398lbs)

Max. Torque to Key

14Nm (124lb•in)

Humidity

95% RH

Material

316L Stainless steel

Optional Key Exchange Cabinets

No. of

Keys

LW

D

Catalogue

Number

mm (inches)

Painted Mild Steel

11 way

(max)

400

(15.7)

300

(11.8)

200

(7.87)

440T-AIPB30

15 way

(max)

400

(15.7)

400

(15.7)

210

(8.26)

440T-AIPB33

25 way

(max)

600

(23.6)

600

(23.6)

210

(8.26)

440T-AIPB34

40 way

(max)

800

(31.4)

800

(31.4)

210

(8.26)

440T-AIPB35

Stainless Steel

15 way

(max)

400

(15.7)

400

(15.7)

210

(8.26)

440T-AIPB40

25 way

(max)

600

(23.6)

600

(23.6)

210

(8.26)

440T-AIPB44

40 way

(max)

800

(31.4)

800

(31.4)

210

(8.26)

440T-AIPB45