9
017-230-B4 Rev B
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 used to generate an “On Battery” contact.
C2, C3:
These contacts are energized when the battery drops below a pre-set voltage level. They can be used to
generate a
Low Battery
alarm. To change the pre-programmed level to match the batteries used and the actual
operating conditions, see
Low Battery Warning
in "UPS Maintenance > Battery" on page 38.
C4:
This contact is energized after the Alpha FXM has been in Inverter mode for 2 hours.
To change the pre-programmed 2 hours to match your operating conditions, see
Load Shed Timer Configura-
tion
in "UPS Maintenance > Relay & Load Shed" on page 41.
C5:
The C5 contact is energized when any alarm is generated—see "Table P — Alarm Submenu" on page 78.
C6:
The factory default layout for the C6 contact is a relay that is energized when the Alpha FXM is in Line or
Inverter modes and is de-energized when in Standby mode. It provides 48 Vdc (500 mA) from the external bat-
teries to an external fan or other equipment. C6 can be factory-configured as a dry contact.
Figure 3 — 48 Vdc Contact Layout (De-energized Shown, Factory Default for C6)
Figure 4 — User Input Layout
Optically isolated user inputs C7 and contacts C8
The optically isolated user inputs are used to attach an external switch panel for remote control of the Alpha FXM
or to allow the Alpha FXM to control optional Alpha Off-Line Automatic Transfer Switch (ATS).
User Input (C7):
This relay has three contacts that are used to control the Alpha FXM:
19 (S1):
Shorting this contact starts the Alpha FXM self test. See "UPS Maintenance > Battery" on page 38.
20 (S2):
Shorting this contact activates an alarm. See "UPS Maintenance > User Input" on page 46.
21 (S3):
Shorting this contact disables the AC output. There is no AC output power, but the Alpha FXM is still
energized. A manual restart is required to put the Alpha FXM back to normal operation.
22 (C):
Isolated return for contacts S1, S2 and S3.
10
19
S1:Self Test
20
S2:Alarm
21
S3:Shutdown
22
Common
+48Vdc, 500mA
(FXM 1100/2000, 650-
48) or +24Vdc (FXM
650-24) from the
external batteries.
Microprocessor
18
16
17
Contact
C6
