Alpha FXM 1100 - Wiring the External Batteries

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5.2 Wiring the External Batteries
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• Use new batteries when installing a new unit. Verify that all batteries are the same type with identical date
codes.
• For the FXM 650-24, the battery string is 24 VDC. For the FXM 650-48/1100/2000, the battery string is 48
VDC.
• If you are making your own battery wiring harness, use at least 10 AWG (for FXM 650/1100) or 8 AWG (FXM
2000) wires.
• The battery return connection is to be treated as an Isolated DC return (DC-I) as defined in GR-1089-CORE.
5.2.1 Procedure
1. For FXM 650-48/1100/2000 (48 V battery string), number the batteries from 1 to 4 with labels or tape. For
FXM 650-24 (24 V battery string), number the batteries from 1 to 2 as shown in the figure below.
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Tape the battery temper-
ature sensor to the side
of either battery #2 or #3.
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To positive terminal
To negative terminal
Optional in-line fuse
Tape the battery temperature
sensor to the side of either bat-
tery #2 or #1.
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To positive terminal
To negative terminal
Optional in-line fuse