Power Source Selection; Using Ac Input Power; Using Dc Input Power - Spectracom SecureSync 1200 User Reference Manual

2.7 Connecting Supply Power
2.7.1

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.
The following sections discuss AC and DC power input. Connect AC and/or DC power, as
required.
2.7.2

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.
2.7.3

Using DC Input Power

If the rear panel DC port is present, connect DC power, per the voltage and current as called
out on the label that resides above the DC power connector.
38
— This unit will contain more than one power source if both the AC
DANGER!
and DC power options are present. Turning off the rear panel power switch will
NOT remove all power sources.
Caution: This equipment has Double Pole/Neutral Line Fusing on AC power.
Note: Important! SecureSync is earth grounded through the AC power connector.
Ensure SecureSync is connected to an AC outlet that is connected to earth ground
via the grounding prong (do not use a two prong to three prong adapter to
apply AC power to SecureSync).
DC power is an option chosen at time of purchase. The rear panel DC
Note:
input port connector is only installed if the DC input option is available. Different
DC power input options are available (12 V
at 7 A maximum or 24/48 V
maximum). Review the DC power requirement chosen, prior to connecting DC
with a voltage range of 12 to 17 V
DC
input with a voltage range of 21 to 60 V at 3 A
DC
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2 SecureSync User Reference Guide Rev. 23