User Manual

Gateway - QSG

The Lithium battery is installed in aluminum battery holder B1 with the positive terminal facing up

as shown. If the battery is inserted incorrectly, the battery is automatically disconnected from the

GW3 circuitry for safety and the red reverse-polarity indicator LED will illuminate.

The lithium battery is available in two configurations:

• a button-cell (D-cell flashlight-style battery) uses the battery holder connections

• a battery with a wired locking connector which is plugged into Li-Bat connector P3

For shipping and extended storage, disconnect the lithium battery from the Gateway; by removing

the battery, disconnecting it from P3,

or by removing jumper JP5

(manufacturing option). The battery

must be disconnected for air shipment

(some air shippers do not ship Lithium

batteries at all, but all want the battery

disconnected); jumper J5 allows

shipment of the Gateway with the

battery installed but disconnected.

Battery holder (B1) has a retaining clip

that holds the battery securely against

vibration and shock. When the Lithium

battery is depleted, slide the clip off

the holder, remove and replace the

battery, then replace the clip.

The GW3 constantly monitors the Lithium battery and displays the battery

status using the Lithium LEDs on the LED status panel. A fresh Lithium battery

will have 4 green LEDs illuminated; as the battery discharges, the LEDs will

turn off one at a time and when the battery is nearly discharged, all of the green

LEDs will turn off. When the battery is depleted or if other battery problems are

detected, the Lithium red error LED will illuminate.

Lithium batteries have a typical service life in excess of 10 years. In most

cases, the SLA battery will power the gateway through any power outages and

the lithium battery will last for its expected service life. If an extended power

outage drains the lithium battery, it must be replaced.

Warning: Lithium Thionyl batteries are capable of supplying large amounts of

power and can be dangerous if short-circuited. The Gateway

circuitry includes a self-resetting fuse that automatically limits the

battery current in the event of a short circuit, however care should be

exercised while handling Lithium batteries.

Passivation

When lithium batteries are not used, they develop an internal oxidation layer called passivation

that prevents them from delivering their rated current. As the battery is used (loaded), the

passivation dissipates and the battery is able to deliver full current. When batteries sit on the

shelf for extended periods or are used in a standby capacity, this passivation can render the

batteries unusable. When a new battery is installed in the Gateway, a load is automtically applied

for 5 minutes to remove passivation; thereafter, a load is applied weekly to prevent accumulation

of more passivation; this assures that battery will always be ready to provide backup power.