2-8

Presence Sensing Safety Devices

Safety Light Curtains

GuardShield Type 4

Description

The Allen-Bradley Guardmaster GuardShield safety light curtain is

an economical, fully featured, Type 4 safety light curtain in a

uniquely styled housing. GuardShield safety light curtains are general

purpose presence sensing devices designed for use on hazardous

machinery providing point of operation, as well as perimeter and

access guarding. This self-contained, two box, safety light curtain has

DIP switch selectable operating modes and are available in both

14mm and 30mm resolutions.

Modes of operation such as fixed and floating blanking, beam

coding, start/restart interlock, external device monitoring (EDM),

machine test signal, are selected by dip-switches settings. These dip-

switches are located beneath a security door, which are conveniently

located on both the transmitter and receiver end caps.

The GuardShield’s torsionally rigid, extruded aluminium,

polyurethane powder coated housing, combined with an

Environmental rating of IP65, allows the GuardShield to be used in

guarding applications across a broad range of industries.

Features

• Fixed blanking—teachable

• Floating blanking—one or two beam

• Beam coding

• External Device Monitoring (EDM)

• Start/restart interlock

Specifications

Note: The external power supply must be capable of buffering brief

power failures of 20ms as specified in IEC 60204.

Standards

EN 61496 Parts 1 & 2

Approvals

TUV and CE marked for all applicable

directives; UL 61496, UL 1998

Protected Height

160mm...1760mm (6.3in...69.3in) in

160mm (6.3in) increments

Scanning Range/Resolution

0.3-7m/14mm (0.98-22.9ft/0.55in)

0.3m-18m/30mm (0.98-59ft/1.18in)

Resolution

14mm/30mm (0.55in/1.18in)

Enclosure Rating

IP 65

Connection Type

Transmitter: 4-pin micro QD

Receiver: 8-pin micro QD

Supply Voltage Uv

Maximum Residual Ripple

5 Vss

Power Consumption

0.9...2 Amps (no-load) 0.4A max (no

load)

Synchronization

Optical, without separate

synchronization channel

Outputs—Safety

2 x PNP, 0.5 A, short circuit protected

Output—Non safety

1 x PNP 0.5A max.

Minimum Output Voltage

Uv - 2V

Response Time

Depending on number of beams

Protection

Short circuit and overload

Cable Length

30m (100ft) max.

Mode of Operation

Manual or automatic restart

Safety Category

Type 4 (self-checking) per EN 61496

Operating Ambient Temp.

-10°C to 55°C (14°F to 131°F)

Air Humidity

15%...95% (not condensing)

Storage Temperature

-25°C to 75°C (-13°F to 167°F)

Approximate Dimensions

Height

Housing Cross Section

Length dependent upon protected

height; (see dimensional drawings)

40 mm x 50 mm (1.57in x 1.96in)

Transmitter Wavelength

870nm

Vibration Resistance

IEC60068-2-6, frequency 10Hz to 55Hz

Amplitude: 0.35mm (0.01in)

Shock

IEC60068-2-29 acceleration 10g, pulse

duration 16ms