Install Sim Cards; Apply Dielectric Grease Over Sim Contacts - Digi LR54 User Manual

Hardware setup

Install SIM cards

To install SIM cards:
1. On the LR54 front panel, use a screwdriver to remove the SIM slot cover.
2. For high-vibration environments, apply a thin layer of dielectric grease to the SIM contacts.
Note If the LR54 device is used in an environment with high vibration levels, SIM card contact
fretting may cause unexpected SIM card failures. To protect the SIM cards, Digi strongly
recommends that you apply a thin layer of dielectric grease to the SIM contacts prior to
installing the SIM cards. See
3. Insert the SIM card(s) into the SIM sockets. Insert the end of each SIM card with the chamfered
corner first and the SIM contacts facing upwards:
4. After all SIM cards are in place, replace the SIM slot cover.
Apply Dielectric Grease over SIM Contacts
Note Digi recommends using either ...the Loctite® LB 8423 Dielectric Grease or Synco Lube® Silicone
Dielectric Grease.
1. Use a sheet of paper or cardboard over the area where you intend to work.
2. Use isopropyl alcohol and a cotton-tipped applicator to gently clean the SIM contacts. Using
isopropyl alcohol requires a well vented environment. Demineralized water can also be used as
an alternative.
3. Once the surface is clean and dry, apply a small amount of dielectric grease in a thin layer over
the contacts. Use a new cotton-tipped applicator to work the grease smoothy over the
contacts. Apply gentle pressure.
LR54 User Guide
Apply Dielectric Grease over SIM Contacts
Install SIM cards
for instructions.
30