概念
PS-24V Power Supplies
PS-24V is the power supply for the AS-P, Automation Server, and I/O modules. The PS-24V power supply requires an input voltage of either 24 VAC +/–20 % or 24–30 VDC.
The PS-24V power supply is based on the patented two-piece design. Each PS-24V device consists of an electronics module and a terminal base.
PS-24V is usually installed on a DIN rail in a cabinet and provides power to the subsequent devices in the chain through the terminal base backplane. A PS-24V power supply consumes one address position, even though the address is not used.
A system may contain more than one PS-24V to supply the power needed, depending on the type and number of connected devices. A power budget table can be used for proper calculations. 有关更多信息，请参阅 Power Budget .
The output voltage is 24 VDC supplied on the backplane, maximum 30 W. If the output is overloaded, the power is automatically shut down and the Status LED turns red. At an interval of a couple of seconds the power supply retries to switch on the power output. This is sometimes called ‘the hiccup mode’. 有关更多信息，请参阅 Power Supply Overload .
The power supply has galvanic isolation between the primary (input power) and secondary (output power) side of the power supply.
Electronics Modules
The electronics module is the main component of SmartStruxure devices that are based on the patented two-piece design. The electronics module is installed on a terminal base, which constitutes the second component of the device.
有关更多信息，请参阅 Electronics Modules .
Terminal Bases
The terminal bases are used for SmartStruxure devices that are based on the patented two-piece design. The terminal base provides the I/O bus to the electronics module installed on the terminal base as well as to the SmartStruxure device installed to the right (next terminal base in the chain).
有关更多信息，请参阅 Terminal Bases .
Power Supply PS-24V LEDs
There are two LEDs on the front panel of the PS-24V. The LEDs indicate status for input and output power.
有关更多信息，请参阅 Power Supply PS-24V LEDs .
Power Budget
Use the power budget to calculate the maximum number of devices that the power supply can supply. If more devices are used, additional power supplies must be added to the I/O bus.
有关更多信息，请参阅 Power Budget .
规格
| DC output | |
Voltage
|
24 VDC
|
Accuracy
|
+/-1 VDC
|
Maximum power
|
30 W
|
| AC input | |
Nominal voltage
|
24 VAC
|
Operating voltage range
|
+/-20 %
|
Frequency
|
50/60 Hz
|
Maximum current
|
2.5 A rms
|
Recommended transformer rating
|
60 VA or higher
|
| DC input | |
Nominal voltage
|
24 to 30 VDC
|
Operating voltage range
|
21 to 33 VDC
|
Maximum power consumption
|
40 W
|
| Terminals | |
|
|
| Environment | |
Ambient temperature, operating
|
0 to 50 °C (32 to 122 °F)
|
Ambient temperature, storage
|
-20 to +70 °C (-4 to +158 °F)
|
Maximum humidity
|
95 % RH non-condensing
|
| Material | |
Plastic rating
|
UL94-5VB
|
Enclosure
|
PC/ABS
|
Enclosure rating
|
IP 20
|
| Mechanical | |
Dimensions including terminal base
|
90 W x 114 H x 64 D mm (3.6 W x 4.5 H x 2.5 D in.)
|
|
|
Weight including terminal base
|
0.285 kg (0.63 lb)
|
Weight excluding terminal base
|
0.186 kg (0.41 lb)
|
Internal Configuration
The PS-24V power supply module does not connect to the address and communication busses in the terminal base. The AC/DC converter terminals L/+ and N/- are isolated from the circuits on the secondary side of the converter. You can wire these terminals without concern for polarity matching, but it is good practice to connect the positive supply voltage to L/+ and the negative supply voltage to N/- in order to prevent confusion.
The earth ground terminal (
Hardware Overview
Electronics Modules
Terminal Bases
Power Supply PS-24V LEDs
Power Budget
Power Supply Overload