Rane | VC 18 | Data Sheet | Rane VC 18 Voltage Converter Data Sheet

Rane VC 18 Voltage Converter Data Sheet
VC 18
Professional Audio Products Data Sheet
VOLTAGE CONVERTER
General Description
The Rane VC 18 UPS (Uninterruptible Power Supply)
Voltage Converter is a special purpose DC-DC converter used
to power Rane products equipped with red modular jacks and
designed for external Remote AC Power, i.e., RAP units. The
VC 18 provides inputs for simultaneous powering by AC and
DC power. When the AC power fails, the VC 18 automatically
switches to DC power, thus providing uninterruptible power.
The AC power source may be either an RS 1, RS 2, FRS 8 or a
RAP 10. The DC power is either a 12 volt or 24 volt battery,
connected to the #6 terminals on the VC 18. (Special protection circuits provide safe operation of the VC 18 in harsh
automotive and other mobile environments.)
The VC 18 may be used to provide emergency back-up
power for all Rane products designed for remote power. See
the Application Information on the back of this sheet for a
complete discussion on which Rane units apply, and powering
more than one unit at a time.
VC 18-2 Option
Ordering a VC 18-2 gets two 6W converters in one VC 18
chassis. Each drives a separate output jack. The VC 18-2
requires powering by a Rane RS 2, 1.5 amp AC supply (or
parallel FRS 8 or RAP 10 outputs); the smaller RS 1 supply
will not work.
Features
•
•
•
•
•
•
UNINTERRUPTIBLE POWER SOURCE
AC INPUT & 12/24 VDC BATTERY INPUT
±18 VDC DC/DC CONVERTER OUTPUT
6W OUTPUT; EXPANDABLE TO 2x6W
FULLY REGULATED
HIGH OUTPUT ALLOWS ±15 VOLT REGULATORS TO OPERATE
•
•
•
•
•
•
REVERSE & OVERVOLTAGE PROTECTION
TRANSIENT SPIKE PROTECTION
SYSTEM POWER SWITCH
IGNITION SWITCH TERMINAL
OUTPUT GROUND ISOLATED FROM INPUT
COMPLETE EMI/RFI SHIELDING
Parameter
GENERAL SPECIFICATIONS
Rated Output Power
Efficiency
Rated Output Voltage
Rated Output Current
Specification
Limit
Units
6 (2x6 for VC 18-2)
85
±18
167 (2x167 for VC 18-2)
Min
5%
10%
W
%
VDC
mA
Ripple and Noise
Rated Temperature
DC BATTERY INPUT
..........Input Voltage Range
..........Full Load Input Current
150
0 to +70
Min
mVp-p DC to 20Mhz
°C
No Derating
12-24
583/292 (1.2A/584 for VC 18-2)
10%
Max
VDC
mAD
12V/24V Input
Max
10%
VAC
mAA
mAA
W
660pF Between Commons
AC INPUT
..........Input Voltage Range
..........No Load Input Current
..........Full Load Input Current
..........AC Isolation
16-23
60 (120 for VC 18-2)
650 (1300 for VC 18-2)
80k @ 3kHz
Conditions/Comments
7W (14W for VC 18-2) Input Power
VC 18
Professional Audio Products Data Sheet
VOLTAGE CONVERTER
Application Information
Using the VC 18 as an uninterruptible power supply requires nothing more complicated than hooking up an RS 1, RS 2, FRS
8 or RAP 10 AC power source (NOTE: a VC 18-2 requires an RS-2 or two parallelled outputs from an FRS 8 or RAP 10), and a
12 or 24V DC battery. The VC 18 works from the AC source until it fails; then it automatically switches over to the battery
backup and continues to provide uninterruptible power until the battery runs down.
Rule: The required DC current equals one-third (1/3) of the AC current. Therefore simply divide the
maximum AC current (silkscreened under the red modular jack & found on the Data Sheet) by three
(3) to get the required DC current. This current must be less than 167 milliamps to use a VC 18 (read
the asterisk note below). DO NOT EXCEED THE MAXIMUM CURRENT RATING.
AC 22/B
AC 23/B
AC
mA
160
260
DC
mA
53
87
AP 13
AD 22/B
DC 24
DMS 22
GE 30
600
650
600
650
650
200*
217*
200*
217*
217*
MS 1
PE 15
PE 17
PS 1
220
300
450
175
73
100
150
58
SM 26B
SM 82
200
650
67
217*
MODEL
* The maximum AC current ratings are in many cases quite conservative. They allow such things as simultaneously driving
all output channels to +20dBu levels into 600 ohms, or all LEDs lighting together, etc. True worst case design. Since these
events rarely occur in actual use, downrating the required DC current by 20-30% is easily possible. Make such reductions if for
your application you do not need 600 ohms line driving ability (overwhelmingly, modern equipment input impedances equal
10,000 ohms or greater—never as low as 600 ohms), or if you are not using all channels, or if your use is not continuous, or is
usually low level, etc. Just use common sense.
In general, if an RS 1 will power it, a VC 18 will power it.
Dash-Two Differences. A VC 18 has one converter and drives both output jacks in parallel. A VC 18-2 has two converters
and each drives one output jack, and requires an RS 2 as the AC input device—an RS 1 will not work. In essence, two VC 18's
in one box. Looked at another way, a VC 18 delivers a total of 167 mA from two jacks, while a VC 18-2 delivers 167 mA out of
each jack. Before you ask, NO, YOU CANNOT PARALLEL OUTPUTS. The output of the two converters will not add.
Instead, each will go into short-circuit limit and shut down.
Powering Two or More Units. Two output jacks implies the ability to drive two units, right? –if you're careful. You can
drive as many units as you want just so long as you do not exceed the 167 mA maximum. Looking at the Tables above shows
you could drive three AC 22's, but you could only drive one PE 17 for example. For VC 18-2 use, you could power two PE 17's.
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL (206)355-6000 FAX (206)347-7757 WEB http://www.rane.com
Printed in the U.S.A. on Recycled Paper
All features & specifications subject to change without notice 520-303 MAY96
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