Metro Mobile Computing Workstations MPS-3111 Series Sealed Lead Acid Power Supply - Manual (Page 14)

14 Metro TM MPS-3111 Series SLA Power Supply Operations Manual Supplement
InterMetro Industries Corporation
Powering Up the MPS-3111 SLA Power Supply
The MPS-3111 Series SLA Power Supply is controlled in two different modes:
• When the Power Supply is plugged into AC mains, it always provides DC power output to
the Metro TM Series Mobile Computing Workstation systems.
• When the Power Supply is unplugged from AC mains, the “ON/Extended Storage” Switch
located on the back of the unit controls the DC power output to the Metro TM Series Mobile
Computing Workstation systems.
ON/Extended
Storage Switch In the “ON” position, the SLA battery is connected to the power supply
and either:
• The battery provides DC power to the Metro
TM Series Mobile
Computing Workstation systems when the power supply is
unplugged from AC mains, or,
• The power supply charges the battery when the power supply is
plugged into AC mains.
If the workstation is not used for an extended period of time, the
ON/Extended Storage Switch should be put in the “Extended Storage”
(OFF) position. The switch position disconnects the battery from any
internal or external equipment and avoids deep discharges of the
battery, which can cause damage to the battery.
ON/Extended Storage Switch
Warning: Risk of Electric Shock
The AC power cord is the only means to disconnect the MPS-3111
Series SLA Power Supply from the AC power grid (mains). The
ON/Extended Storage Switch on the power supply does not disconnect
from main power.
On the other side, the power supply employs a sealed lead acid battery
to provide mobile DC output power. Low voltage (10-16 VDC) DC
power is available from the power supply, even when the AC cord is
disconnected from an AC outlet. To remove DC power, put the
ON/Extended Storage Switch in the Extended Storage (OFF) position
and unplug the power supply from the AC outlet.