2.1 Precautions for the Trex unit
Before operating the Trex unit, ensure:
• The Trex unit is not damaged.
• The power module is securely attached.
• All screws are sufficiently tightened.
• The communication terminal recess is free of dirt and debris.
• The communication module is securely attached.
CAUTION!
Do not use a screen protector on an IS-approved Trex unit. Static discharge is possible.
2.1.1 Hazardous areas
A Trex unit that meets the Intrinsic Safety requirements (IS-approved) can be used in Zone
1, or Zone 2, for Group IIC, and Class I, Division 1 and Division 2, Groups A, B, C, and D
locations.
An IS-approved Trex unit may be connected to loops or segments that are attached to
equipment located in Zone 0, Zone 1, Zone 2, for Group IIC; Zone 20, Zone 21, Zone 22,
and Class I, Division 1 and Division 2, Groups A, B, C, and D locations.
An IS-approved Trex unit can be ordered by selecting the KL option. The Trex unit has a
label that lists the approvals.
CAUTION!
Do not use a screen protector on an IS-approved Trex unit. Static discharge is possible.
WARNING!
Do not install, remove, or charge the Lithium Ion (Li-Ion) power module in a hazardous area
environment.
WARNING!
Explosions can result in serious injury or death.
Use in an explosive environment must be in accordance with the appropriate local, national,
and international standards, codes, and practices. Please review the Technical specifications
and Product certifications sections of the AMS Trex Device Communicator User Guide for any
restrictions associated with safe use.
Electrical shock can result in serious injury or death.
AMS Trex Device Communicator overview
4 User Guide
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