10
INM F892 Rev 1
5 .7 Chassis Ground Connection
The chassis of the carrier should be connected to a Safety or Instrumentation
Ground using screw terminal 93. This ground is needed for the F892 system to meet
Electromagnetic Compatibility and Electrical Safety requirements.
5 .8 Diagnostic Segment Connectors
Two Diagnostic Segment connectors are available for use in conjunction with the
optional F809F Diagnostic Module. These connectors are only available on units with
date codes after 0726. Please see the Installation Manual for the F809F for further
information. Note that the Diagnostic Segment is completely isolated from any of
the 8 segments powered by the F892-CA carrier. This includes the screen for the
Diagnostic Segment.
Pin No .
Connection
Pin No .
Connection
94
Diag Seg +
97
Diag Seg +
95
Diag Seg S
98
Diag Seg S
96
Diag Seg -
99
Diag Seg -
6
TESTING
6 .1 F801 Status and Alarm LEDs
The F801 or F802 Power Modules are fitted with nine LEDs, eight to indicate segment
status and one to signify an Alarm condition.
Fault Condition
Segment LED
Fault
Alarm contact status
No Fault
Green
Off
Closed
Segment shorted
Off
Red
Open
Output <20V
Off
Red
Open
Input <16V
Off (All)
Red
Open
7
ROUTINE MAINTENANCE
Check the general condition of the installation occasionally to make sure that no
deterioration has occurred. At least every two years (and more frequently for particularly
harsh environments) check:
• the condition of wire connections, terminations, and screens.
• the dc output voltage on each of the eight fieldbus segments is >21.5V for the F801
or >28V for the F802. This can be performed using a multi-meter or a Relcom FBT-6
Fieldbus Monitor.
• the segment LEDs on the Power Module(s) are functioning and the Alarm LED is
not lit .
• the Power Module retaining screws are tight.
• there are no signs of damage or corrosion.
