Alpha Technologies FXM 650, 1100, 2000 UPS - Manual (Page 12)

017-230-B4 Rev B 10
ATS (C8): When the Alpha FXM is in the Inverter mode, this normally open relay closes sending 48 Vdc (FXM
650-48, 1100, 2000) or 24 Vdc (FXM 650-24) from the external batteries to this dry contact (Figure 5). If the op-
tional Alpha Off-Line Automatic Transfer Switch (ATS) is connected, it will cause the ATS to switch the load from
line power to the Alpha FXM battery backup power.
48Vdc from the
external batteries
Contact C8
Microprocessor
23 24
+
11
Status and Alarm LEDs
Status:
Green LED solidly illuminated: the Alpha FXM is in Line mode and line power is provided to the load.
Green LED flashing: the unit is in Inverter mode and backup battery power is provided to the load.
Alarm:
Red LED solidly illuminated: fault in the Alpha FXM. (See "Table Q — Fault Submenu" on page 79.)
Red LED flashing indicates an alarm. (See "Table P — Alarm Submenu" on page 78.)
12 AC Input Circuit 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 AC line power input.
14
Output Terminal Block
This terminal block is the Alpha FXM AC power output.
Figure 5 — ATS Layout