Honeywell ACM 150 - International Line Power; Isolation Transformer; Maintaining AC Power

ACM 150
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5.2.4. International line power
The ACM 150 monitor will operate at either 50 Hz or 60 Hz, single-phase power. If your
line power is outside the 110-115 Vac range, advise Honeywell before placing an order.
The ACM 150 monitor can be set up at the factory to operate on AC power in the 200-230
Vac range. The user is responsible for appropriately sizing the external circuit breaker.
5.2.5. Isolation transformer
The ACM 150 monitor is internally protected against voltage spikes and power fluctuations.
If your line power quality is poor and subject to severe spikes or lightning strikes, an
external isolation transformer (2.0 kVA) should be installed to protect the monitor. This is
unnecessary if the ACM 150 monitor connects to a UPS.
5.2.6. Maintaining AC power
Most users want the ACM 150 monitor to continue to operate when line power is
interrupted. The monitor may be wired to a UPS, Uninterruptable Power Supply, or an
Emergency Power source.