Studio Technologies 44 - Manual (Page 8)

Issue 2, September 2006 Model 44 User Guide
Page 8 Studio Technologies, Inc.
visible from the front panel, provide a status
indication of the active power source(s).
Two of the LEDs light whenever their re-
spective internal power supplies are func-
tioning. With AC mains power connected
both should be lit. If an external source of
24 volts DC is connected it’s LED should
also be lit.
Troubleshooting
If you’re having trouble getting the Model 44
up and running, this section may help.
If you haven’t read the previous sections
of this guide, you should do so before
proceeding.
The first thing to confirm, no matter what
symptoms are present, is that the desired
source of incoming power has been cor-
rectly connected. If a source of AC mains
power is being provided to the Model 44,
the two LEDs associated with the internal
power supplies should be lit. If neither is lit
check the AC mains source to ensure that it
is active and that the power cord is securely
mated with the power entry connector. If
only one of these LEDs is lit, a defective
power supply is most likely the cause. While
temporary operation with one only function-
ing internal power supply is acceptable,
long-term reliability will be compromised. In
this case the Model 44 needs to be returned
to the factory for repair. If an external source
of 24 volts DC has been connected, its as-
sociated LED indicator, located on the front
panel, should be lit. If it is not, check the
power source and associated wiring.
Correct operation of the connected an-
nouncer’s consoles is primarily dependent
on accurate interconnect wiring. If the
announcer’s consoles do not “power up”
then the wiring associated with pair 4 (pins
7 and 8) of the interconnecting cable must
be checked. Straight-through wiring is re-
quired. The connection is polarity sensitive,
with positive on pin 7 and common on pin 8.
Specifications
Applications: designed to work with up to six
Model 200-series announcer’s consoles from
Studio Technologies
Announcer’s Console Power Sources: 6
24 volts DC nominal (26 volts actual with internal
power supplies active), 150 milliamperes nominal
maximum; over-current and short-circuit protected
Interconnection Cable Limit: designed to correctly
support 200-series announcer’s consoles located up
to 100 meters from Model 44 when using standard
computer-type unshielded twisted-pair cabling
Auxiliary 24 Volt DC Output: 24 volts DC nominal
(26 volts actual with internal power supplies active),
70 milliamperes nominal maximum; over-current and
short circuit protected
External 24 Volt DC Input: 24 volts nominal
(24-28 volts acceptable), 1.2 amperes minimum
Connectors:
Announcer’s Console: 6, RJ45 (8-position
modular)
System: 6, RJ45 (8-position modular)
Aux In/Out, Aux 24 Volt DC Output, External 24 Volt
DC Input: female 25-pin D-subminiature, 4-40 threads
AC Mains: 3-blade, IEC 320 C14-compatible (mates
with IEC 320 C13)
AC Mains Requirement: 100-230 volts, 50/60 Hz,
0.8 A maximum @ 100 volts, 0.5 A maximum
@ 230 volts
Dimensions (Overall):
19.00 inches wide (48.3 cm)
1.72 inches high (4.4 cm)
9.58 inches deep (24.3 cm)
Mounting: one space in a standard 19-inch rack
Weight: 6.3 pounds (2.9 kg)
Specifications and information contained in this User
Guide subject to change without notice.