User Manual

017-230-B4 Rev B

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

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.)

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.

Input Terminal Block

This terminal block is the Alpha FXM AC line power input.

Output Terminal Block

This terminal block is the Alpha FXM AC power output.

Figure 5 — ATS Layout