Instruction manual

Strata DK14
Power Considerations
4 Strata DK General Description 6/00
Power Considerations
The power supply generates +5VDC and +24VDC for the entire system (see Table 2).
Table 2 DK14 Electrical Characteristics
Reserve Power
One or two optional Reserve Power Battery and Chargers (HPFBs) can be connected to the Strata
DK14 power supply to maintain normal operation during a power failure. The estimated battery
time for one or two HPFBs is shown below.
Notes
● Reserve power time varies with system call traffic.
● AC power must be available when HPFB is first installed.
● HPFB recharge time is 48 hours per HPFB.
Power Failure Interface
The Strata DK14 KSU provides an interface for a dedicated backup standard telephone during an
AC input power failure. If the system AC input power fails, the backup telephone will
automatically connect to the CO1 line. This feature is independent of the HPFB.
Music-on-Hold (MOH) Interface
Customers can connect their own MOH source to this interface. The source can also feed external
page speakers and telephone speakers with Background Music (BGM).
Paging Interface
This 600-ohm interface can support a Toshiba External Speaker (HESB) or a customer-supplied
amplifier and speaker for Paging, Night Ringing over Page, and BGM applications.
Flexible Relay Contacts
A relay contact can be programmed to either mute BGM during a page announcement over
external speakers, to operate a device—such as an answering machine or ringing bell—during the
Night Mode, or to provide on-off control for a MOH source.
DK14 Primary Power
Input AC
AC frequency
Power
AC input current
115VAC
±10V
50/60 Hz
46 watts maximum
<0.7 amps. max
Power Supply
DC voltage output specification
+24VDC (+26.3~-27.8VDC)
+5VDC (+4.5~+5.5VDC)
DK14 (fully-loaded
system)
Estimated Battery
Time (hours)
One HPFB 0.5~1.0
Two HPFBs 1.0~2.0