Guardian Telecom EXT-401 Installation Manual
Industrial Communications Worldwide
Intrinsically Safe EXT-401 Headset Kit
Installation
Field installation of an Intrinsically Safe EXT-401 Headset Kit onto a Guardian EXT-401
Explosion Proof Telephone replaces the original handset.
PART NO. DESCRIPTION
P4042 Intrinsically Safe EXT-401 Headset Kit
IF YOU HAVE QUESTIONS CONCERNING THIS PRODUCT PLEASE CONTACT OUR SERVICE
DEPARTMENT BY PHONE, TOLL FREE IN NORTH AMERICA 1-800-363-8010, AT 1-403-258-3100
OUTSIDE OF NORTH AMERICA OR BY E-MAIL AT THE ADDRESS SHOWN BELOW.
P006427 Rev. A 080102 7/28/2014 11:05 AM
Ph: 403.258.3100 \ email:info@guardiantelecom.com \ www.guardiantelecom.com
7552 - 10th Street N.E. Calgary, Alberta, Canada T2E 8W1
WARNING
It is the responsibility of the end user to ensure that this product meets the requirements for the area
in which it is to be installed and that it is installed according to local regulations.
Table of Figures
Figure 1 - Removing Handset Assembly...............................................3
Figure 2 - Installing Hanger Assembly..................................................3
Figure 3 - Connecting to Receptacle.....................................................3
Package Contents
QUANTITY DESCRIPTION PART NO.
1 Hanger C/W Hook Switch Magnet P006428
1 Headset Hanger Bracket P004420
1 ISH1125 Headset Assembly P004035
2 Screws (#10-32 Flat Head) P004063
Installing the Headset Kit
1. Check the package contents against the contents list to ensure that all
parts are at hand.
2. Remove the handset by unscrewing the upper knurled connector collar
then pulling the plug straight down.
3. Check the receptacle for damage or dirt, clean if necessary.
4. Remove the Philips screws from the two handset retainers and remove
the retainers.
5. Remove the two setscrews from the upper surface of the enclosure using
a 3/32” Allen key.
6. Install the bracket (P004420) to the top of the enclosure using the two
screws supplied. Do not deepen the holes in the enclosure since
doing so would nullify the Hazardous Area Approval.
7. Install the hanger (P006428) onto the bracket by snapping it into place.
8. Place the new headset on the hanger.
9. Align the slot on the plug shell with the key on the socket.
10. Screw the upper knurled collar into the socket. Do not use a wrench to
tighten the knurled collar.
11. Test the installation by lifting the hanger up for off-hook and pulling down
for on-hook.
See: Figure 1 - Removing
Handset Assembly
See: Figure 2 - Installing
Hanger Assembly
See: Figure 3 - Connecting
To Receptacle
2
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