Series 90-30 PLC Installation and Hardware Manual, GFK

Series 90-30 PLC Installation and Hardware Manual, GFK
4
IC693PWR331 High Capacity Power Supply, 24 VDC Input
The Series 90-30 DC input High Capacity power supply (IC693PWR33) is a 30 watt wide range
supply designed for 24 VDC nominal inputs. For applications requiring greater +5V current
capacity than is available with the standard supply, this supply allows all 30 watts to be consumed
from the +5 V output. It will accept an input voltage range from 2 VDC to 30 VDC. Although it
is capable of maintaining all outputs within specifications with input voltages as low as 2 VDC, it
will not start with initial input voltages of less than 8 VDC. This power supply provides the
following outputs:
Ŷ
+5 VDC output.
Ŷ
+24 VDC Relay power output which provides power to circuits on Series 90-30 Output Relay
modules.
Ŷ
Isolated +24 VDC, which is used internally by some modules, can also be used to provide
external power for 24 VDC Input modules.
The load capacity for each output of this power supply is shown in the following table.
Table 4-10. IC693PWR331 Power Supply Capacities
Catalog
Number
IC693PWR33
Load
Capacity
30 Watts
Output Capacities (Voltage/Power *)
Input
2 to 30
VDC
+5 VDC
30 watts
+24 VDC Isolated 20
watts
+24 VDC Relay 5
watts
* Total of all outputs combined cannot exceed 30 watts.
PWR
OK
IC693PWR331
Series 90-30
RUN
BATT
SYSTEM
STATUS
INDICATORS
HIGH CAPACITY
POWER SUPPLY
PROGRAMMABL
E
+
INPUT
CONTROLLER
24 VDC
50 WATT
CONNECTIONS FOR
DC POWER SOURCE
+
24 VDC
OUTPUT
0.8A MAX.
INTERNAL POWER SOURCE
MODULES
REQUIRING 24VDC
FOR
LITHIUM
BACK-UP
BATTERY
B
A
T
T
E
R
Y
RS-485
COMPATIBLE
SERIAL PORT
BATTERY
CONNECTORS
Figure 4-8. Series 90-30 24 VDC Input High Capacity Power Supply - IC693PWR331
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Chapter 4 Power Supplies
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Table 4-11. Specifications for IC693PWR331 Power Supply
Nominal Rated Voltage
Input Voltage Range
Start
Run
24 VDC
Input Power
Inrush Current
50 watts maximum at full load
*
Output Power
5 VDC: 30 watts maximum **
24 VDC Relay: 5 watts maximum
24 VDC Isolated: 20 watts maximum
NOTE: 30 watts maximum total (all three outputs)
Output Voltage
5 VDC: 5.0 VDC to 5.2 VDC (5. VDC nominal)
24 VDC Relay: 9.2 to 28.8 VDC
24 VDC Isolated: 9.2 VDC to 28.8 VDC
8 to 30 VDC
2 to 30 VDC
Protective Limits
Overvoltage:
Overcurrent;
5 VDC output: 6.4 to 7 V
5 VDC output: 7 A maximum
0 ms minimum
Holdup Time:
Standards
*
Refer to data sheet, GFK-0867B, or later version for
product standards, and general specifications.
Dependent on installation and power supply impedance characteristics.
** Derate per Figure 2-22 at ambient temperatures above 50°C (22°F).
Current Derating for Higher Temperatures
6.1
6.0
5.8
5.6
5.4
5.2
5 VDC
5.0
CURRENT
4.8
4.6
4.4
4.2
4.0
0
10
20
30
40
50
55
60
AMBIENT TEMPERATURE (°C)
Figure 4-9. 5 VDC Current Output Derating for Temperatures above 50°C (122°F)
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4
Calculating Input Power Requirements for IC693PWR331
Use the following procedure to determine input power requirements for the 24 VDC High Capacity
Power Supply:
Ŷ
Determine total output power load from typical specifications listed for
individual modules at the end of this chapter.
Ŷ
Multiply the output power by .5 to determine the input power value.
Ŷ
Divide the input power value by the operating source voltage to determine the
input current requirements
Ŷ
Use the lowest input voltage to determine the maximum input current
Ŷ
Allow for start-up surge current requirements
Ŷ
Allow margins (0% to 20%) for variations
Field Wiring Connections to the DC Input-Only Power Supplies
DC Power Source Connections
The + and - wires from the DC power source connect to the top two terminals on the
terminal strip. The + wire should be connected to the top terminal screw, and the - wire to
the second screw (counting from the top down). The ground connection connects to the
third screw. This connection scheme is clearly marked on the front of these power
supplies.
Isolated 24 VDC Supply Output Connections
The bottom two terminals of the power supply terminal strip provide connections to the
Isolated +24 volt DC output which can be used to provide power for external circuits
(within power limitations of the supply).
Caution
If the Isolated 24 VDC supply is overloaded or shorted, the
Programmable Logic Controller will stop operation.
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Chapter 4 Power Supplies
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4
Common Series 90-30 Power Supply Features
Status Indicator Lights on all Power Supplies
Four LEDs are located on the upper right front of the power supply faceplate. The purpose of these
LEDs is as follows:
PWR
The top green LED, labeled PWR, provides an indication of the operating state of the
power supply. The LED is ON when the power supply has a correct source of power and
is operating properly, and OFF when a power supply fault occurs or power is not applied.
OK
The second green LED, labeled OK, is steady ON if the PLC is operating properly, and
OFF if a problem is detected by the PLC.
RUN
The third green LED, labeled RUN, is steady ON when the PLC is in the RUN mode.
BATT
The bottom red LED, labeled BATT, will be ON if the memory backup battery voltage is
too low to maintain the memory under a loss of power condition; otherwise it remains
OFF. If this LED is ON, the Lithium battery must be replaced before removing power
from the rack, or PLC memory may be lost.
Input Overvoltage Protection Devices
This information applies to all Series 90-30 power supplies except IC693PWR322
and IC693PWR328. The overvoltage protection devices for this power supply are
connected internally to pin 4 on the user terminal strip. This pin is normally connected to
frame ground (pin 3) with the supplied jumper strap which is installed at the factory. If
overvoltage protection is not required or is supplied upstream, this feature can be disabled
by removing the jumper strap from pins 3 and 4.
If you want to Hi-pot test this supply, overvoltage protection must be disabled during the
test by removing the terminal strip jumper strap. Re-enable overvoltage protection after
testing by reinstalling the strap.
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Series 90-30 PLC Installation and Hardware Manual – August 2002
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1
2
3
Jumper Strap Connects
Overvoltage Protection
Devices to Frame Ground
Frame Ground
4
Screw Terminals
on Terminal Board
Figure 4-10. Overvoltage Protection Devices and Jumper Strap
Output Voltage Connections to Backplane (All Supplies)
The following figure illustrates how these three output voltages are connected internally to the
backplane on the baseplate. The voltage and power required by modules installed on the baseplate
is supplied through the baseplate connectors.
POWER SUPPLY
BACKPLANE
USE/COMMENTS
USED INTERNALLY ON ANALOG INPUT,
ANALOG OUTPUT, AND DC INPUT MODULES.
I 24V
ALSO AVAILABLE ON EXTERNAL
TERMINALS ON DC INPUT MODULES AND
ON FRONT OF POWER SUPPLY FOR
USER APPLICATIONS.
IGND
R24V
USED INTERNALLY ON
RELAY OUTPUTS
RGND
SINGLE
POINT
CONNECTION
DC
P5V
USED INTERNALLY ON CPU,
INPUTS, OUTPUTS, ETC.
DC
LGND
2 POINT
CONNECTION
FGND
EXTERNAL CONNECTION
TO EARTH GROUND.
Figure 4-11. Interconnection of Power Supplies
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Chapter 4 Power Supplies
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4
Overcurrent Protection (all Supplies)
The 5V logic output is electronically limited to 3.5 amps (7 amps for high capacity supplies). An
overload (including short circuits) is sensed internally and causes the supply to shut down. The
supply will continually try to restart until the overload is removed. An internal fuse in the input
line is provided as a backup. The supply will usually shut down before the fuse blows. The fuse
also protects against internal supply faults.
Timing Diagram
The timing diagram below shows the relationship of the DC input to the DC outputs and to the
Power Supply OK signal (PSOK) generated by the power supply. When power is first applied, the
PSOK signal goes false. This line remains false for a minimum of 20 msec after the +5V bus is
within specifications, then it becomes true.
If input power is interrupted, the +5V bus will remain within specifications and PSOK will remain
true a minimum of 0 milliseconds. PSOK then goes false. The +5V bus will remain within
specifications for an additional 4 milliseconds minimum to allow an orderly shutdown of the
system.
INPUT
POWER
ON
INPUT
POWER
OFF
MOMENTARY
POWER
LOSS
VOLTAGE
OVERSHOOT
5% (MAX)
VOLTAGE
OVERSHOOT
5% (MAX)
+5V OUTPUT
(5.1V TYP.)
97% (MIN)
HOLD
UP
TIME*
HOLD
UP
TIME
20MS
20MS
10MS
(MIN)
(MIN)
(MIN)
4MS
(MIN)
4MS
(MIN)
PSOK
*HOLD-UP TIME:
20 ms, minimum for IC693PWR321/330
14 ms, minimum for IC693PWR322
10 ms, minimum for IC693PWR331/332
Figure 4-12. Timing Diagram for all Series 90-30 Power Supplies
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Series 90-30 PLC Installation and Hardware Manual – August 2002
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CPU Serial Port Connector on Power Supply (All Supplies)
A 5-pin D-type female connector, accessed by opening the hinged door on the right front of the
power supply, provides the connection to a CPU serial port which is used to connect to:
Ŷ
A programmer (usually a personal computer) running GE PLC programming software.
Ŷ
The GE Hand-Held Programmer.
Ŷ
Other serial devices.
a43832
RS-485
COMPATIBLE
SERIAL PORT
Figure 4-13. Serial Port Connector
Ŷ
The serial port connector is only functional in a power supply that is installed in a baseplate
that also contains the CPU. The serial port is not functional on a power supply that is installed
in an expansion or remote baseplate.
Ŷ
Any device connected to the serial port that uses +5 VDC power from the Series 90-30 power
supply must be included in the calculation for maximum power consumption (see “Power
Supply Loading Calculations” in Chapter 2).
CPU Serial Port Information
The serial port connector on the power supply accesses the CPU serial port, which is a feature of all
Series 90-30 CPUs. See Chapter 5, “CPUs” for information on this serial port.
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Chapter 4 Power Supplies
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4
Backup Battery for RAM Memory (All Supplies)
The long-life Lithium battery (IC693ACC30) used to maintain the contents of the CMOS RAM
memory in the CPU is accessed by removing the cover plate located at the bottom of the power
supply faceplate. This battery is mounted on a plastic clip attached to the inside of this cover.
The battery is wired to a small Berg female connector that connects to either of the two Berg male
connectors mounted on the Power Supply printed circuit board. This battery can be replaced with
power applied to the PLC.
BATTERY
CONNECTORS
B
A
T
T
E
R
Y
LITHIUM
BACK-UP
BATTERY
Figure 4-14. Backup Battery for RAM Memory
Caution
If a Low Battery Warning (BATT LED turns ON) occurs, replace the
battery located in the power supply before removing power from the rack.
Otherwise, there is a possibility that data will be corrupted or the
application program will be cleared from memory.
Additional Battery Information
For additional information on the memory backup battery, see the chapter, “Memory Backup and
Backup Battery.”
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Series 90-30 PLC Installation and Hardware Manual – August 2002
GFK-0356Q
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