EnerSys Alpha FXM HP 1100, Technical Manual

Page: 26 / 150

0170022-J0 Rev A Page 14
Optically isolated user inputs C7 and contacts C8 are used to attach an external switch panel for remote
control, or to allow the unit to control optional Alpha Off-Line Automatic Transfer Switch (ATS).
C6 The factory default layout for the C6 contact is a relay that is energized
when the unit is in Line or Inverter modes and is de-energized when in
Standby mode. It provides 48Vdc (500 mA) or 24Vdc (500mA) from the
external batteries to an external fan or other equipment.
C6 can alternatively be factory-configured as a dry contact
.
Figure 4: Contact Layout (De-energized Shown, Factory Default for
C6)
Table 7: C7 to C8 Optically Isolated User Inputs (Sheet 1 of 2)
Feature Description
User Input (C7) This relay has three contacts that are used to control the unit:
19 (S1): Shorting this contact starts the Alpha FXM HP self test.
20 (S2): Shorting this contact activates an alarm.
21 (S3): Shorting this contact disables the AC output. There is no AC
output power, but the unit is still energized if connected to a battery.
A manual restart is required to put the unit back to normal operation.
22 (C): Isolated return for contacts S1, S2 and S3.
Figure 5: User Input Layout
Table 6: C1 to C5 Dry Contacts (Continued) (Sheet 2 of 2)
Feature Description
+48Vdc, 500mA
(FXM 1100/2000, 650-
48) or +24Vdc (FXM
650-24) from the
external batteries.
Microprocessor
18 16 17
Contact
C6
NC NO C
19
S1:Self Test
20
S2:Alarm
21
S3:Shutdown
22
Common