9
TRUNKGUARD™
Series Fieldbus Device Couplers
(Zone 1 Locations)
TG300
Maintenance
The TG300 series contain no user serviceable parts.
Non-functioning units should be returned to Moore
Industries for replacement or repair.
WARNING:
Substitution of components may impair
the device coupler, wiring and field device
suitability for hazardous area applications.
Note:
When returning non-functioning units only
the DIN-Rail mounted electronics should be
returned. It is normally prudent to retain the
enclosure, glands, and connectors with their
terminals attached when a device coupler is
changed out in the field.
TG300 enclosures have weatherproof seals on
enclosure lids and on cable glands; these should be
periodically inspected to verify correct operation. Any
significant water entry should be investigated and
corrected in order to prevent malfunction.
In high humidity environments, it may be appropriate
to have enclosure breathers fitted so that internal
condensation does not lead to equipment malfunction.
Customer Support
If service assistance is ever required for an instrument
in your application, refer to the back cover of this
manual for the telephone numbers to MooreHawke
Customer Service Department.
If possible, make a note of the model number of the
unit before calling. For fastest assistance, have the
following available: serial number, job number or
purchase order number.
Operation
Each spur has three LEDs indicating the following
states:
Normal, Fault
and
De-Energized
.
During normal operation, the GREEN LEDs should be
ON for all spur connections.
If any RED LED(s) are ON, the affected spur(s) have
fault(s) in external wiring or field device(s). Please
refer to the
Testing and Troubleshooting
section..
Use the DISCONN Key to de-energize that spur,
remove the wiring and then re-energize it by removing
the DISCONN Key. This spur now has no device
connected, and the GREEN LED should turn ON with
the RED LED turning OFF. Use this to confirm a fault
in the spur wiring or field device.
Segment termination is automatically provided by
the last TG300 unit connected in the segment, and
operation is indicated by a YELLOW LED labeled
Active Auto Terminator*.
*Auto-terminator function not applicable with -MT option.
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