Rockwell Automation Allen-Bradley Guardmaster GuardShield 440L-AGST... Bedienungsanleitung

Installation Instructions

Original Instructions

GuardShield Washdown Enclosure

Catalog Number

440L-AGST

xxx

Description

TheGuardShield™washdownenclosureisdesignedtoprovide an

environmentally protective enclosure for the standard GuardShield

family of safety light curtains, which are applied in washdown

applications.Theseapplicationsaretypicallyfoundinthefood and

beverage industry.

These acrylic tubes are sold in pairs and provide protection for

GuardShield Type4 POC and the GuardShield PAClight curtains. The

enclosures come with acetal endcaps and stainless steel mounting

brackets. Enclosures are offered in protective heights from

320…960mm (12.6…37.79 in.).

The GuardShield washdown enclosures meet the IP67 requirements per

IEC 60529 and 1200 psi washdown.

GuardShieldsafetylightcurtainsmustbeproperlyassembled according

to the procedure that is described in this document and mounted in

accordancewiththerequirements that are detailed in publication

440LIN012.

Optical Properties

The GuardShield safety light curtain is a Type4 ESPE per IEC 61496

Parts 1 and 2. As such, the GuardShield Type4 meets the IEC 61496

optical angular divergence emission and reception requirements of

±2.5°. When the GuardShield Type4 POC and PAClight curtains are

assembled into the acrylic tube, the optical emission and reception

(EAA) meet the requirements of a Type 2 device, for instance ± 5°. The

result is that the infrared light is emitted over a greater angle of

divergence, which can increase thepossibility of optical reflection of the

infrared light off a reflective surface.

It is necessary to first properly calculate the required safety distance for

the particular application, determine the protective height of the

GuardShield, and then calculate the distance (a) from the formula in

Figure 2 - Minimum Distance from Reflecting Surfaces. The

GuardShield can be required to be mounted at the greater calculated

distance from the point of operation hazard based on this reflective

distance.

Figure 1 - Distance to Reflective Surface

Figure 2 - Minimum Distance from Reflecting Surfaces

Note: Formula: a = tan 5.0° x D (mm)

a = Minimum distance to reflective surfaces (mm)

D = Distance between transmitter and receiver (m)

Topic Page

Description 1

Optical Properties 1

Assembly Procedure 2

Cleaning 2

Replacing the Acrylic Tube 2

Dimensions [mm (in.)] 3

ATTENTION: If the transmitted infrared light is reflected off of a

shiny surface and is, then seen by the receiver, it is possible that an

object can penetrate further into the protectivefield of the

GuardShield before being detected.

Distance D (meters)

1600

1500

51520310

a (mm)

800

100

900

300

1000

200

1100

400

1200

500

1300

600

1400

700

D (m)

2Rockwell Automation Publication 440L-IN014A-EN-P - October 2017

GuardShield Washdown Enclosure

Assembly Procedure

• Assemble spacer plate to bottom of transmitterand receiver

endcaps.

• Attach transmitter and receiver QDcordsets

• Slide leads of cordset through acetal endcaps and grips. Do not

tighten grips now.

• Attach acetal endcaps to spacer plates with two socket head

screws.

• Gently pull on cordset to remove any slack and then hand

tightengrips.

• Press top acetal endcaps into acrylic tubes to confirm that each

endcap is properly seated on the top of the acrylic tube.

• Insert light curtain and acetal endcap assembly into the acrylic

tube and carefully slide the GuardShield light curtain. Position

the assembly so that the top of the GuardShield housing fits

into the recessed area in the top acetalendcap.

• Firmly press the bottom acetal endcap into acrylic tube, and

confirm that the bottom endcap is seatedin the acrylic tube.

• Assemble top and bottom stainless steel brackets to each end of

the washdownenclosure.

• Follow the mounting instructions in the publication

440LIN012 to confirm that the proper safety distance has

been calculated. And that the location of the GuardShield light

curtains in the washdown enclosure meets all safety mounting

requirements.

Cleaning

The GuardShield washdown enclosures are made of acrylic and must

be cleaned regularly using a non-abrasive cleaning agent or simply with

water and a damp, lint freecloth.

Replacing the Acrylic Tube

If the acrylic enclosure is damaged mechanically or experiences a

reduction of optical properties from cleaning fluids, and so on, it is

necessary to remove the GuardShield light curtain from the enclosure,

replace the enclosure, and install the GuardShield assembly to the new

acrylic enclosure.

There is a specific disassembly process to follow when removing the

GuardShield safety light curtain from the washdown enclosure.

• Begin byremoving the top acetal endcap from the acrylic

enclosure.

• Slide the bottom endcap from the acrylicenclosure.

• Install the top endcap to the new acrylictube.

• Insert the bottom endcap with GuardShield into the acrylic

tube. Position the top of the GuardShield so that it fits into the

recessed portion of the top endcap.

Rockwell Automation Publication 440L-IN014A-EN-P - October 2017 3

GuardShield Washdown Enclosure

Dimensions [mm (in.)]

Table 1 - GuardShield Type 4

Replace with J for 14 mm (0.55 in.) or K for 30 mm (1.18 in.).

Table 2 - GuardShield PAC

Cat. No. Use with Light Curtain

Cat. No.

Protective Height [mm (in.)]

Mounting Value [mm (in.)]

Total Length [mm (in.)]

440L-AGST320 440L-P40320YD 320±0.5 (12.6±0.02) 542.58 (21.36) 430.58 (16.95) 564.58 (22.23)

440L-AGST480 440L-P40480YD 480±0.5 (18.9±0.02) 702.58 (27.66) 590.58 (23.25) 724.58 (28.53)

440L-AGST640 440L-P40640YD 540±035 (25.2±0.02) 862.58 (33.96) 750.58 (29.55) 884.58 (34.83)

440L-AGST800 440L-P40800YD 800±0.5 (31.5±0.02) 1022.58 (40.26) 910.58 (35.85) 1044.58 (41.13)

440L-AGST960 440L-P40960YD 960±0.5 (37.8±0.02) 1182.58 (46.56) 1070.58 (42.15) 1204.58 (47.42)

Cat. No. Use with Light Curtain

Cat. No.

Protective Height [mm (in.)]

Mounting Value [mm (in.)]

Total Length [mm (in.)]

440L-AGST960 440L-P4A3400YD 810±0.5 (31.8±0.02) 1182.58 (46.56) 1070.58 (42.15) 1204.58 (47.42)

151.6

(5.97)

131.6

(5.18)

Inverted

Bracket

Mounting

Value

Mounting

Value

62.2

(2.45)

7.1

(0.28) Dia.

140.5

(5.53)

Protective

Height

Total

Length

(3.66)

(3.23)

111.5

(4.39)

102.6

(4.04)

130

(5.12)

Allen-Bradley, Guardmaster, GuardShield, Rockwell Automation, and Rockwell Software are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Rockwell Otomasyon Ticaret A.Ş., Kar Plaza İş Merkezi E BlokKat:6 34752 İçerenköy, İstanbul, Tel: +90 (216) 5698400

Rockwell Automation maintains current product environmental information on its website at

http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page.

Publication 440L-IN014A-EN-P - October 2017 PN-10531

75046-231 Ver 03

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