to the FXM for it to monitor the battery temperature. The
charging voltage is temperature dependant and the FXM’s
microprocessor adjusts it for optimum charging.
• The sensor MUST be attached to the FXM for normal
operation. Firmly attach the sensor end to the centre
battery’s case with high-strength flameproof tape (such
as duct tape) as shown in “Wiring the External Batteries”
on page 28. If it isn’t, a “Temperature Probe Unplugged”
alarm will appear on the LCD. See “Troubleshooting”,
Temp Probe Unplugged on page 87.
9
Contacts C1 to C6
Contacts C1 to C5 allow you to connect the FXM to an
external monitoring panel or to traffic control equipment.
The factory default settings are as given below, but
you can program them to meet your requirements (See
“Programming the Dry Contacts and the Clock” on page
51). See also “Novus User Software, Operations, Relay and
Load Shed” on page 63.
For Contact C6, the default factory configuration for the
FXM 650-48, FXM 1100 and FXM 2000 is +48VDC output
(FXM 650-24 is +24VDC), but it can be factory configured
as a dry contact.
Figure 3.5 shows the contact’s layout while Figure 3.6
shows the +48VDC or +24VDC terminal block layout.
The contacts have
a maximum rating
of 1A at 250V.
Microprocessor
UPS
Interior
Normally
Closed
(NC)
Normall
y
Open
(NO)
Common (C)
Figure 3 .5 - Contact Layout
(Standard for C1 to C5, Factory Option for C6)
•
C1:
This contact is energized when line power is unquali-
fied and the FXM provides backup battery power to the
load(s). It can be called the “On Battery” contact.
•
C2, C3:
These contacts are energized when the battery
drops below a pre-set voltage level. They can be called
the “Low Battery” contacts.
You can change the pre-programmed level to match the
batteries used and the actual operating conditions.
See
16
FXM UPS Operator's Manual
Doc# 017-201-B0 Rev 0408
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