3-40

Interlock Switches

Guard Locking Switches

Centurion

Description

The Centurion is a positive mode, thumbwheel operated machine

guard locking interlock switch that locks the guard closed until the

operator manually rotates the thumbwheel, retracting the shaft from

the guard door. The action of retracting the shaft initiates two

functions; it isolates the power to the machine while the guard is open

and, due to the operating principle, gives up to 20 seconds delay

before the guard can be opened.

Alternative styles with longer shafts can increase the time delay by as

much as 50%. The Centurion is ideal for use on simple machines

with short, constant run down times. It is important that correct

installation and operation of the unit are followed to ensure that the

retractable shaft cannot be extended when the guard is open. For

machines with long or variable run down times or where frequent

access is required, solenoid locking switches such as the TLS-GD2

and Atlas 5 should be considered.

The Centurion has 2 safety (N.C.) contacts, 1 auxiliary (N.O.) contact

and 1 conduit entry (either M20 or quick disconnect).

EX and Pneumatic styles of the Centurion are also available; see the

Explosion Proof section on page 16-1 for more information.

Note: Additional safety measures (i.e., a shroud) should be used

to ensure the thumbwheel can only be accessed by fingertips.

Features

• Manually operated time delay, allows for machine run down

• Simple operation & installation

• Robust die cast housing, ideal for heavy duty applications

• Contacts, 2 N.C. & 1 N.O. (sealed to IP66)

73013

Specifications

Note: The safety contacts of the Guardmaster switches are described as normally

closed (N.C.) i.e., with the guard closed, actuator in place (where relevant) and the

machine able to be started.

Centurion Thumbwheel Operation

Standards

EN954-1, ISO13849-1, IEC/EN60204-1,

NFPA79, EN1088, ISO14119, IEC/

EN60947-5-1, ANSI B11.19, AS4024.1

Category

Cat. 1 Device per EN954-1

Dual channel interlocks suitable for

Cat. 3 or 4 systems

Approvals

CE marked for all applicable directives,

cULus, BG, and SUVA

Safety Contact

2 N.C. direct opening action

Designation/Utilization Cat.

AC (Ue)

(Ie)

DC

AC15

500V 250V 100V

1A 2A 5A

250V 0.5A 24V 2A

Max Switched Current/Volt/

Load

500V/500VA

Thermal Current (lth)

10A

Min Current

5V 5mA

Safety Contact Gap

>2mm (0.078in)

Rtd. Insulation Voltage

(Ui) 500V

Rtd. Impulse withstand Volt

(Uimp) 2500V

Auxiliary Contacts

1 N.C.

Shaft Movement to Achieve

Contact Operation

2mm (0.078in)

Case Material

Heavy duty die cast alloy

Locking shaft

Stainless Steel

Protection

IP66

Conduit Entry

1 x M20 or quick disconnect

Operating Temperature

-25°C to +80°C (-10°F to +176°F)

Mounting

2 x M4

Mechanical Life

1,000,000 operations

Electrical Life

1,000,000 operations

Weight

500g (1.20lbs)

Colour

Red

Interlocking shaft is manually

retracted from the guard by

rotating the thumbwheel.