C-7
Scanner
®
2000 microEFM Appendix C
Internal
ground screw
External
ground screw
Figure C.4—Ground screw locations
Lithium Battery Pack
The Scanner 2000 microEFM is shipped with a lithium battery pack. In Foundation™ eldbus applications,
this battery pack provides backup power. Primary power is provided by a eldbus power supply.
To supply backup power to the instrument, connect the lithium battery cable to connector J1 on the main
circuit assembly (Figure 3.2, page 63).
CAUTION Always connect the lithium battery to the main board before connecting eldbus power
to the eldbus interface board. See also Foundation™ Fieldbus Power Supply below.
In the event that eldbus power is lost, the lithium battery will help ensure that timekeeping and volume
accumulation will not be interrupted. Low-power microprocessor technology enables the Scanner 2000 to
operate for an estimated 1 year on a lithium battery pack.
WARNING: Replace the Scanner 2000 lithium battery only with Cameron battery pack Part No.
9A-30099004. With appropriate measures to prevent damage, the battery pack may be replaced
in a hazardous area.
Foundation™ Fieldbus Power Supply
The Scanner 2000 is bus-powered by a Foundation™ eldbus power supply. A two-conductor cable connects
the power supply to the eldbus interface board inside the Scanner 2000 enclosure. Route the cable through
the conduit opening in the top of the enclosure and wire as shown in Figure C.5, page C-8. If a junction box
is in use, eldbus power may be wired as shown in Figure C.9, page C-18.
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