2 Equipment Description
2.6 EHPM Card Files
R688 HPM High-Performance Process Manager Service 49
December 2020 Honeywell
EHPM +5 volt power margins
EHPM +5 volt power margining can be accomplished by using the jumper positions under the front
cover of the High-Performance I/O Link card. The possible settings are Normal, High, and Low
margins. Power margining is used by manufacturing test and can also be used for troubleshooting
intermittent hardware problems as a last resort. Power margining is effective as soon as the jumper is
moved.
ATTENTION
Honeywell does not recommend the use of power margins on any device that
is on-process. Figure 5 High-Performance I/O Link Card (Front Panel)
identifies the pinning selections on the High Performance I/O Link card with a
single jumper.
It is important that the jumper be placed in the Normal position when a nominal voltage level is required
(rather than removing the jumper completely). The jumper in the Normal position is required to
internally set the correct values for error detection (error trip points) at the nominal voltage level.
EHPM FTE Interface module
The following figure illustrates the front panel of the EHPM FTE Interface module. Each FTE cable
(yellow and green) is connected to a CF9 Ethernet Switch (yellow and green).
Redundant EHPMs connected to an Experion network have a crossover cable connecting the redundancy
ports (bottom port) of the two EHPM FTE Interface modules. This is not required for a standalone
EUCN node that is not connected to an Experion network.
Figure 5.2 EHPM FTE Interface Module (Front Panel)
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