Specifications

9
017-230-B0 Rev 0810
C1: The C1 contact is energized when line power is unqualified and the Alpha 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 ac-
tual operating conditions. See “Operating the Alpha FXM “#35 Low Battery Warning Voltage”.
C4: This contact is energized after the Alpha FXM has been in Inverter mode for 2 hours. It can be called the
“Timer” contact.
You can change the pre-programmed 2 hours to match your operating conditions. See “Programming the Dry
Contacts and the Clock, Setting the Timer Contact”.
C5: The C5 contact is energized when the Alpha FXM is operating close to the specified limits. It can be called
the “Alarm” contact.
C6: The factory default layout for the C6 contact is a relay that is energized when the Alpha FXM is in Line or In-
verter modes and is de-energized when in the Standby mode. It provides 48 VDC (500 mA) or 24 VDC (500 mA)
from the external batteries to an external fan or other equipment. C6 can be factory-configured as a dry contact.
+48VDC, 500mA
(FXM 1100/2000, 650-
48) or +24VDC (FXM
650-24) from the
external batteries.
Microprocessor
18
16 17
+
Contact
C6
Figure 3 — Contact Layout (Standard for C1 to C5, Factory Option for C6)
The contacts have
a maximum rating
of 1A at 250V.
Microprocessor
UPS
Interior
Normally
Closed (NC)
Normally
Open (NO)
Common (C)
Figure 4 — 48 VDC / 24 VDC Contact Layout (De-energized Shown, Factory Default for C6)