Bulletin No. APSIS-C
Drawing No. LP0184
Released 11/02
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
www.redlion-controls.com
MODEL APSIS -
Octal Plug-in Accessory Power Supply With 20 mA Current Sources
PROVIDES...
!
24 VDC UNREGULATED “HELPER” SUPPLY FOR LOAD
SHARING WITH OTHER 24 VOLT SYSTEMS WITH UNUSUAL
SENSOR AND ACCESSORY LOADS OR...
“STAND-ALONE” APPLICATIONS FOR POWERING +24 VDC
SENSORS AND ACCESSORIES OR...
TWO 20 mA CURRENT SOURCES, EACH CAPABLE OF
SUPPLYING 20 mA OF CURRENT FOR SERIAL
COMMUNICATION LOOPS AND POWERING UP TO 16 UNITS
PER LOOP.
!
!
DESCRIPTION
The Model APSIS is a convenient plug-in unregulated +24 VDC power
supply designed to
“load share”
when connected in parallel with other +24
VDC unregulated systems with unusual power requirements due to sensor or
accessory loading
(see Fig.1).
It can also be used as a general purpose stand-
alone supply to power +24 VDC control circuits, sensors and accessories
(see
Fig.2).
In addition, two 20 mA Current Source outputs are available, each
capable of powering up to 16 Serial Communications units
(see Fig.3).
The
APSIS is available in 115 and 230 VAC ±10%, 50/60 Hz. primary supply
(see
Ordering Information).
Operating temperature range is -20°C to +50°C.
SPECIFICATIONS
1.
POWER SOURCE:
2 versions, 115 VAC or 230 VAC ±10%, 50/60 Hz., 11
VA max.
(see Ordering Information).
2.
POWER OUTPUT:
+24 VDC unregulated @ 200 mA max. current*,
Ripple = 1.5 V P-P max.
3.
OUTPUT:
Two 20 mA current sources, each capable of supplying 20 mA of
current for serial communication loops and powering up to 16 units per loop.
4.
OPERATING TEMPERATURE:
-20°C to +50°C (-4°F to +122°F)
*
Maximum available output current derates to 175 mA with 1 source active
and 150 mA max. with both sources active.
TYPICAL LOAD SHARING CONNECTION DIAGRAM
DIMENSIONS In inches (mm)
Mating
Sockets
Sold
Separately
(See
Ordering
Information)
FIGURE 1
TEMPERATURE MONITORING SYSTEM
A temperature monitoring process requires both remote
and control room indicators and datalogging capabilities.
An RTD
(Resistance Temperature Detector)
to 4 to 20 mA
Transmitter, provides a proportional 4 to 20 mA output
from the RTD input. Two Red Lion Controls
“Loop
Powered Process Indicators” (Model LPPI)
are installed
in series in the
“Loop”
and scaled to provide Local and
Remote temperature displays. A Datalogger is also placed
in the
“Loop”
to provide a hard-copy of process
temperatures. Each device in the
“Loop”
has an associated
“voltage drop”
as follows: RTD Transmitter = 9 VDC
drop; LPPI = 3 VDC x 2 units = 6 VDC drop; Datalogger
= 5 VDC drop. The total voltage drops in the
“Loop”
=
20 VDC. Therefore, RLC’s Model APSIS, with its +24
VDC Supply, is used to power this process
“Loop”.
FIGURE 2
PROCESS MONITORING
SYSTEM
8 Apollo Thermocouples
(APLTC)
and 8
GEMINIs, all with isolated 20 mA Current
Loop Serial Communications, monitor and
control processes within a plant. All units,
which are located in different areas of the
plant, are tied together in series in two
“Loops” (one Transmit Tx, the other
Receive Rx)
and are connected to a Central
Computer located in another area of the
plant. Since there are more than 7, and no
more than 16 units in the
“Loop”,
the
APSIS +20 mA Current Source Outputs are
used to power each
“Loop”. (Both Apollo
Thermocouple and Gemini units can power
up to 7 units in a “Loop” when using their
internal 20 mA sources. However, their
sources may not be tied together to power
more than 7 units.)
Each unit is assigned a
different address number and the same Baud
rate
(see appropriate APLTC or Gemini data
sheet).
An application program is written
which allows the Central Computer to send
and retreive data from any APLTC or
Gemini.
OUTPUT VOLTS/CURRENT
*Unregulated
output +(2) 20 mA current
sources (if used).
FIGURE 3
ORDERING INFORMATION
MODEL NO.
DESCRIPTION
PART NUMBERS FOR
AVAILABLE SUPPLY VOLTAGES
230 VAC
115 VAC
APSIS
Accessory Power Supply- Current Source
Base Mount, 8-Pin Octal Socket
Din Rail Mount, 8-Pin Octal Socket
APSIS010
APSIS000
SKT10000
SKTDIN00
Embedded System
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