Specifications
017-230-B0 Rev 0810
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ATS (C8): When the Alpha FXM is in the Inverter mode, this normally open relay closes (Figure 6), sending 48
VDC (FXM 650-48, 1100, 2000) or 24 VDC (FXM 650-24) from the external batteries to this dry contact. If the
optional Alpha Technologies’s Automatic Transfer Switch (ATS) is connected, it will cause the ATS to switch the
load from line power to the Alpha FXM’s battery backup power.
48VDC or 24VDC from
the external batteries
Contact C8
Microprocessor
23
24
+
Figure 5 — User Input Layout
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Status and Al arm LEDs
Status: When this green LED is illuminated, the Alpha FXM is in Line mode and line power is provided to the
load. When this LED is flashing, the unit is in Inverter mode and backup battery power is provided to the load.
Alarm: When this red LED is illuminated, there is a fault in the Alpha FXM. When this LED is flashing, there is an
alarm.
12
Input C ircuit Breaker
This circuit breaker is an on/off switch for the line power into the Alpha FXM that also provides input protection. It
must be switched on for proper Alpha FXM operation.
13
Input Terminal Block
This terminal block is the Alpha FXM’s AC line power input.
14
Output Te r minal Block
This terminal block is the Alpha FXM’s AC power output.
Contact C7 Contact C8
19
S1:Self Test
20
S2:Alarm
21
S3:Shutdown
22
Common
Figure 6 — ATS Layout
Contacts C7 and C8
These optically isolated inputs are used to attach an external switch panel for remote control of the Alpha FXM or
to allow the Alpha FXM to control Alpha Technologies’s optional Automatic Transfer Switch (ATS).
User Input (C7): This relay has three contacts that are used to control the Alpha FXM (Figure 5). They are:
19 (S1): Shorting this contact starts the Alpha FXM’s battery test. See “Operating the Alpha FXM, Battery Test”.
20 (S 2): Shorting this contact activates an alarm. See “Trouble Analysis, User Input Alarm".
21 (S3): Shorting this contact disables the AC output. There is no AC output power, the LCD display shows
“SHUTDOWN” (Model 1000 only), 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. It is located on contact C8 (#22).
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