Caution: For safety reasons the SecureSync unit is intended to be operated in a
HORIZONTAL POSITION, RIGHT-SIDE-UP, that is with the keypad to the left side
and the 4-line information display and the time display on the right side.
2.6 Connecting Supply Power
Depending on the equipment configuration at time of purchase, SecureSync can be powered
from:
an AC input
a DC input
with both AC, and DC input.
Supplying both AC and DC input power provides redundant and automatic power switchover
in case one or the other input power sources is lost.
Before connecting power to the unit, be sure that you have read all safety information detailed
in section "SAFETY" on page33.
2.6.1 Power Source Selection
If both an AC, and a DC power source are connected to the unit, the following rules apply:
If AC and DC power are both applied, AC power is used.
If DC power is applied, but AC power is not, then DC power will be used.
If AC and DC power are both present, but AC power is subsequently lost, SecureSync
will automatically switch to using the DC power input.
DANGER! — This unit will contain more than one power source if both the AC
and DC power options are present. Turning off the rear panel power switch will
NOT remove all power sources.
The following sections discuss AC and DC power input. Connect AC and/or DC power, as
required.
2.6.2 Using AC Input Power
Connect the AC power cord supplied in the SecureSync ancillary kit to the AC input on the rear
panel and the AC power source outlet. The AC input is fuse-protected with two fuses located in
the AC power entry module (line and neutral inputs are fused). The AC power entry module
also contains the main power switch for the AC power applied to the equipment.
38
CHAPTER 2 • SecureSync User Reference Guide Rev. 26
2.6 Connecting Supply Power
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