Eaton PXS24 Series User manual

Technical manual MD019003DE
Valid as of September 2020

Technical manual MD019003EN
Valid as of September 2020
PXS24... system
Valid as of September 2020
2 EATON www.eaton.com
Inhaltsverzeichnis
1 Summary of the manual ..................................................................................................................... 4
2 Type overview...................................................................................................................................... 5
2.1 Electronic circuit breakers........................................................................................................... 5
2.2 Accessories................................................................................................................................... 5
2.3 Standard ....................................................................................................................................... 6
2.4 Economy....................................................................................................................................... 6
2.5 Temperature rise in case of modules >13 A.............................................................................. 6
2.6 PXS24 with supply terminals...................................................................................................... 6
3 Applications.......................................................................................................................................... 7
3.1 Using the PXS24 as an electronic protection device................................................................ 7
3.1.1 Active current limitation.......................................................................................................... 7
3.2 Using the PXS24 as a protective relay....................................................................................... 7
3.2.1 Table indicating the PXS24 service life if used as a relay.................................................... 7
4 Technical data ...................................................................................................................................... 8
4.1.............................................................................................................................................................. 9
5 Terminals............................................................................................................................................ 10
5.1 Connection via push-in cage clamp terminals........................................................................ 10
5.2 Busbar connection..................................................................................................................... 11
5.2.1 Busbar without PXS24-IT supply terminal .......................................................................... 11
5.2.2 Busbar with a PXS24-IT or AKI16/10 supply terminal ........................................................ 11
5.2.3 Busbar cover .......................................................................................................................... 11
5.2.4 Placeholder modules............................................................................................................. 12
5.3 Connection examples................................................................................................................ 12
5.3.1 Feed-in via a single power supply unit with <= 20 A.......................................................... 12
5.3.2 Feed-in via a single power supply unit with 20 A to 40 A.................................................. 13
5.3.3 Feed-in via two power supply units..................................................................................... 14
6 The various circuit breaker elements............................................................................................... 15
6.1 PXS24 LED.................................................................................................................................. 15
6.2 PXS24 switch.............................................................................................................................. 15
7 Communication interface.................................................................................................................. 15
7.1 Inputs .......................................................................................................................................... 16
7.1.1 Input voltage levels ............................................................................................................... 16

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7.1.2 Internal wiring of the inputs ................................................................................................. 16
7.2 Outputs ....................................................................................................................................... 16
7.2.1 Output voltage levels ............................................................................................................ 16
7.2.2 Output current carrying capacity.......................................................................................... 16
7.2.3 Ground connection................................................................................................................ 16
7.3 Logic table .................................................................................................................................. 17
7.4 Off command priority................................................................................................................ 17
7.5 Circuit examples ........................................................................................................................ 17
7.5.1 External switching –signal path........................................................................................... 18
7.5.2 External reset –signal path................................................................................................... 18
7.5.3 Status monitoring via an external controller ...................................................................... 19
7.5.4 Switching via an external controller .................................................................................... 19
7.5.5 Full control via an external controller (monitoring and switching) .................................. 19
7.5.6 Reset with pushbutton –power supply via the PXS24 ...................................................... 19
7.5.7 Reset with pushbutton or relay –power supply via external voltage .............................. 20
7.5.8 Overcurrent indication via signal element .......................................................................... 20
7.5.9 Overcurrent status transfer via relay ................................................................................... 20
7.5.10 Time-delayed overcurrent status transfer via time relay............................................... 21
7.5.11 Reset with pushbutton and overcurrent indication via signal element, relay & time
relay 21
7.5.12 Connecting multiple PXS devices .................................................................................... 21
7.5.13 Group error message - group connection of several PXS24s (monitoring and
switching) ........................................................................................................................................... 22
7.5.14 Sequence control............................................................................................................... 23

Technical manual MD019003EN
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1Summary of the manual
This manual describes the interaction of the various PXS24 components.
This document also discusses accessories such as busbars, input terminals,
etc.
In addition, it also describes the stand-alone operation of the device.
Grayed out fields apply to the Standard version only and not to the Economy
modules.
Up-to-date information and the most recent version of this document are
available at
Eaton.com/PXS24
We recommend downloading the latest versions of all relevant documents prior to
planning.

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2Type overview
2.1 Electronic circuit breakers
Designation
Communication port
Rated current
Supply terminals
Article no.
Series
PXS24E-e2/F
-
2 A
✓
PXS24E02A002
Economy
PXS24E-e4/F
-
4 A
✓
PXS24E04A002
Economy
PXS24E-e6/F
-
6 A
✓
PXS24E06A002
Economy
PXS24E-e8/F
-
8 A
✓
PXS24E08A002
Economy
PXS24E-e10/F
-
10 A
✓
PXS24E10A002
Economy
PXS24E-e2/F-IT
-
2 A
-
PXS24E02A001
Economy
PXS24E-e4/F-IT
-
4 A
-
PXS24E04A001
Economy
PXS24E-e6/F-IT
-
6 A
-
PXS24E06A001
Economy
PXS24E-e8/F-IT
-
8 A
-
PXS24E08A001
Economy
PXS24E-e10/F-IT
-
10 A
-
PXS24E10A001
Economy
PXS24S-e2/F/ORT-IT
✓
2 A
✓
PXS24S02A001
Standard
PXS24S-e4/F/ORT-IT
✓
4 A
✓
PXS24S04A001
Standard
PXS24S-e6/F/ORT-IT
✓
6 A
✓
PXS24S06A001
Standard
PXS24S-e8/F/ORT-IT
✓
8 A
✓
PXS24S08A001
Standard
PXS24S-e10/F/ORT-IT
✓
10 A
✓
PXS24S10A001
Standard
PXS24S-e13/F/ORT-IT
✓
13 A
✓
PXS24S13A001
Standard
PXS24S-e16/F/ORT-IT
✓
16 A
✓
PXS24S16A001
Standard
PXS24S-e2/F/ORT
✓
2 A
-
PXS24S02A002
Standard
PXS24S-e4/F/ORT
✓
4 A
-
PXS24S04A002
Standard
PXS24S-e6/F/ORT
✓
6 A
-
PXS24S06A002
Standard
PXS24S-e8/F/ORT
✓
8 A
-
PXS24S08A002
Standard
PXS24S-e10/F/ORT
✓
10 A
-
PXS24S10A002
Standard
PXS24S-e13/F/ORT
✓
13 A
-
PXS24S13A002
Standard
PXS24S-e16/F/ORT
✓
16 A
-
PXS24S16A002
Standard
2.2 Accessories
Designation
Description
Article no.
Series
PXS24-PCH
Blank module
PXS24ACC0000
Accessories
PXS24-IT
Feed-in terminal
PXS24ACC0001
Accessories
AKI16/10
Feed-in terminal, isolated
Y7-184515
Accessories
PXS24-BB/80A/1m
Busbar 1 m
PXS24BB00001
Accessories
PXS24-BB/80A/4TE
Busbar 4 MU
PXS24BB00004
Accessories
PXS24-BB/80A/8TE
Busbar 8 MU
PXS24BB00008
Accessories
PXS24-BB/80A/12TE
Busbar 12 MU
PXS24BB00012
Accessories
PXS24-BBC
Busbar cover
PXS24ACC0002
Accessories

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2.3 Standard
The Standard version of the PXS24 module offers the perfect combination of protection and connectivity.
All Standard modules are equipped with a communication interface.
The Standard modules are available with a fixed rated current of up to 16 A.
The communication interface offers the following advantages:
•Sequence control (see “Communication interface – Sequence control”)
•Digital outputs (see “Communication interface – Outputs”)
•Digital inputs (see “Communication interface – Inputs”)
•The option to use the device as a protective relay (see “Applications – Using the PXS24 as a protective
relay”)
2.4 Economy
The devices of the Economy series do not have a communication interface. They are designed for applications where
no circuit-breaker status messages are required.
2.5 Temperature rise in case of modules >13 A
In order to protect the individual modules from the thermal effects of the adjacent modules, we recommend placing
a module with a rated current >13 A next to a module with a rated current <13 A wherever possible.
Derating: If three or more modules rated 16 A are placed directly next to each other (in the specified temperature
range), these must be derated to 13 A.
2.6 PXS24 with supply terminals
Active modules with the additional designation “IT” are equipped with feed-in terminals and can thus supply power
to the busbar. A maximum current of 20 A may be supplied per module.
Modules without the additional designation “IT” are not equipped with feed-in terminals and can therefore only be
supplied via the busbar.

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3Applications
3.1 Using the PXS24 as an electronic protection device
All PXS24 modules (Economy or Standard) can be used as electronic protection devices.
In the event of an overcurrent (short circuit or overload) the PXS24 does not switch off immediately. Instead, it will
actively limit the overcurrent first and will only de-energize the load side after the switch-off time has been exceeded.
This ensures that system-related overcurrents (charging of capacitors, inrush current when starting a motor, etc.) do
not cause nuisance tripping.
3.1.1 Active current limitation
If the residual current exceeds the rated current by a factor of 1.3, the PXS24 will limit the applied residual current to
1.25 times the rated current.
The PXS24 will switch off after the switch-off time has elapsed.
Rated current IN
Switch-off time
(typically)
Active current limitation
2 A
470 ms
1.25 x IN
4 A
280 ms
1.25 x IN
6 A
170 ms
1.25 x IN
8 A
110 ms
1.25 x IN
10 A
90 ms
1.25 x IN
13 A
80 ms
1.25 x IN
16 A
70 ms
1.25 x IN
Grayed out data apply only to the Standard series, not to Economy
3.2 Using the PXS24 as a protective relay
The Standard PXS24 devices can also be used as protective relays. The PXS24 can be controlled via the digital
inputs, so that loads or function groups can be switched on and off.
3.2.1 Table indicating the PXS24 service life if used as a relay
Rated current
Service life if used as a relay ton = 0.05
s / toff = 10 s
IN
2 A
>10,000,000
4 A
>10,000,000
6 A
>10,000,000
8 A
400,000
10 A
10,000
13 A
Not used as a relay - protection only
16 A
Not used as a relay - protection only

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4Technical data
Variable
Economy
Standard
Marking
CE
Certification
UL508 + UL2367 (sections 10 and 12)
Product standard
The applicable parts of:
EN60947-1, EN60947-5-1, EN61009-1,
EN61131-2 and EN61000-4-2
For details see factory standard WN 1008
Electrical:
Operating voltage Ub
24 V DC (16… 30 V DC)
Rated current IN
Fixed; 2, 4, 6, 8, 10 A
Fixed; 2, 4, 6, 8, 10, 13, 16 A
Disconnection of overload and
short circuit currents
Typically 1.3 x IN, with active current limitation to 1.25 x lN
Switch-off times for
electronic switch-off
See the time/current table
Capacitive loads
Up to 20,000 μF
Inductive loads
In≤6 A …τmax ≤60 ms
6 A < In≤10 A …τmax ≤12 ms
In ≤6 A …τmax ≤60 ms
6 A < In ≤10 A …τmax ≤12 ms
10 A < In ≤16 A …τmax ≤7.5 ms
Service life if used as a relay
Not available
See the time/current table

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4.1
Mechanical:
Number of channels
1
Width
17.5 (1 MU)
Height
92.5 mm
Depth
119.2 mm
Feed-in terminals (optional)
3 x LINE (+) and 3 x GND (-)
Output terminals
3 x LOAD (+) and 3 x GND (-)
Terminal type
Push-in terminals
Terminal capacity of load
inputs and load outputs
0.5-2.5 mm² (flexible with ferrule)
0.5-4 mm² (rigid)
Communication port
Not available
2 x communication output (internally
linked)
2 x communication input (internally
linked)
1 x GND
Terminal type of the
communication port
Not available
Push-in terminals
Terminal capacity of the
communication port
Not available
1 mm² (flexible with ferrule)
1.5 mm² (rigid)
Busbar system
LINE (+) and GND (-); max. 80 A
Different lengths up to 1 m
Assembly
Snap-fit onto a TH35 mounting rail (EN 60715)
Status LED
Two-colored; green = OK;
red = tripped
Off = channel not in operation
Slider
On/off/reset
Remote signaling output
Trip indicator
Not available
According to IEC 61131-2;
Max. current load 200 mA;
Max. 30 PXS24 units can be connected
simultaneously
Remote signaling input
On
Off
Reset
Not available
According to IEC 61131-2;
Max. 30 PXS24 units can be connected
simultaneously
Sequence control
Not available
Via the communication port
Text field
17.5 x 6 mm
Degree of protection
IP20
Ambient temperature
-30 °C to 55 °C
Storage temperature
-40 °C to 100 °C
Humidity
96h/95% relative humidity at 40 °C as per IEC 600068-2-78 (non-
condensing)

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5Terminals
Terminal type
Terminal marking
Protected output load + 24 V DC
1.1, 1.2, 1.3
Power supply + 24 V DC
2.1, 2.2, 2.3
Protected output load - GND
3.1, 3.2, 3.3
Power supply - GND
4.1, 4.2, 4.3
Supply terminals 2.X and 4.are not available in the case of switches without the designation “IT”.
5.1 Connection via push-in cage clamp terminals
The maximum conductor cross-section of the push-in cage clamp terminals is 2.5 mm² for flexible connecting cables
(with or without ferrule) and 4 mm² for rigid connecting cables.
The minimum conductor cross-section is 0.5 mm².
Only suitable tools may be used to actuate the cage clamp terminals (e.g. a slotted screwdriver with a blade size of
2.5 x 0.75 mm).
The length of the pin (P) must not be less than 10 mm in the case of ferrules, otherwise it cannot be ensured that the
ferrule will be securely clamped in the terminal.

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5.2 Busbar connection
The PXS24-BB... busbar is designed for currents up to 80 A.
Assembly:
1.) Position the module correctly on the busbar
2.) Shorten the busbar to the desired length using a suitable tool
3.) Push the busbar into the upper (+24 V) and lower (0 V) busbar support.
A force of approximately 15 N is required to press in the busbar.
Disassembly
1.) Push the busbar out of the busbar support by means of an appropriate tool (e.g. a flat screw driver).
5.2.1 Busbar without PXS24-IT supply terminal
Active modules with the additional designation “IT” are equipped with feed-in terminals and can thus supply power
to the busbar. A maximum current of 20 A may be supplied per module.
Modules without the additional designation “IT” are not equipped with feed-in terminals and can therefore only be
supplied via the busbar.
5.2.2 Busbar with a PXS24-IT or AKI16/10 supply terminal
For currents above 20 A, power can be supplied either via several modules, via the feed-terminal (PXS24-IT;
PXS24ACC0001) or via the isolated feed-in terminal (AKI16/10).
5.2.3 Busbar cover
For applications where it is required that parts carrying low voltages are isolated, we offer the PXS24-BBC cover
(PXS24ACC0002).
Once the busbar has been shortened to the correct length, it can be connected to the designated busbar clips of the
PXS24.

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5.2.4 Placeholder modules
To reserve space for later additions, we also offer blank modules that have the same dimensions as live modules:
Article number: PXS24-PCH (PXS24ACC0000)
These can later be replaced with live modules. To make their replacement as simple as possible, we recommend
installing the blank modules at either end (on the left or right).
5.3 Connection examples
5.3.1 Feed-in via a single power supply unit with <= 20 A
If a power supply unit <=20 A is used with devices bearing the designation “IT”, power is supplied via the push-in
terminals of one of the modules of the PXS24 (terminal marking 2.X and 4.X).

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5.3.2 Feed-in via a single power supply unit with 20 A to 40 A
There are two options for supplying power with a current of 20 A to 40 A:
Distributing the power supply via the push-in cage clamp terminals
To distribute the power supply, at least two active modules (module designation ...IT) with supply terminals are
required.
Power supply via the busbar feed-in terminals
The maximum conductor cross-section of the cable connecting the device to the busbar supply terminals is 16 mm².
The busbar is designed for currents up to 80 A.

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5.3.3 Feed-in via two power supply units
There are two options for power supply using two power supply units:
Feed-in via push-in cage clamp terminals
Two separate power supply units with a maximum current of 20 A each can be connected to the push-in cage clamp
terminals.
The busbar is designed for currents up to 80 A.
Feed-in via the busbar supply terminals
Two separate active power supply units can be connected to the busbar feed-in terminals.
The combined rated current of the two power supplies must not exceed 80 A.
The busbar is designed for currents up to 80 A.

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6The various circuit breaker elements
6.1 PXS24 LED
The status of the switch can be easily checked by means of the LED at the front of the PXS24.
It signals the following states:
6.2 PXS24 switch
The switch at the front of the PXS24 can be used to switch the device on and off and to reset it.
7Communication interface
Both the communication port inputs and outputs conform to IEC/EN61131-2 and can therefore be connected directly
to a PLC or used to control loads.
The communication interface is designed as a plugable terminal.

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7.1 Inputs
The inputs with terminal designations 7 and 8 are used for external control of the PXS24. For more information,
please refer to the chapter entitled “Communication interface – remote control.”
7.1.1 Input voltage levels
The voltage at the input must not exceed 30 V DC.
Voltages up to 5 V are recognized as low and voltages above 11 V are recognized as high, provided that the current
at the communication port input is not limited.
Signal level LOW: < 5 V
Signal level HIGH: > 11 V
7.1.2 Internal wiring of the inputs
The internal wiring of the module ensures that it is active even if the communication port inputs are not used.
Inputs 7 and 8 are linked internally.
7.2 Outputs
The outputs with terminal designations 5 and 6 are used to transmit the trip signal.
7.2.1 Output voltage levels
Outputs 5 and 6 are internally linked and operate with a voltage level of 24 V DC.
7.2.2 Output current carrying capacity
The maximum current carrying capacity of the communication outputs is 200 mA.
If used, the PXS24 outputs must always be protected against voltage peaks by suitable means (surge protection
diode, etc.), especially when switching relays.
7.2.3 Ground connection
To enable communication with networks that are not connected to the same power supply, the communication
interface is equipped with an additional ground connection.
This ground connection may only be used for communication purposes!
The outputs with terminal designations 5 and 6 are used to transmit the trip signal.

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7.3 Logic table
Status of the output terminal
(1.1 –1.3)
Communication port
input signal (7 & 8)
Switch position
on the module
Communication port
output signal (5 & 6)
Output terminal
(1.1-1.3)
OK
LOW
OFF
HIGH
Switched off
OK
LOW
ON
LOW
Active
OK
HIGH
OFF
HIGH
Switched off
OK
HIGH
ON
HIGH
Switched off
OK
Nothing is connected
OFF
HIGH
Switched off
OK
Nothing is connected
ON
LOW
Active
Overload
Irrelevant
Irrelevant
HIGH
Switched off
7.4 Off command priority
An “off” command, whether at the switch or at the input of the communication interface, always has priority over an
“on” command.
7.5 Circuit examples
Devices from the Standard series can be switched on, off and reset remotely.
This can be done using a variety of controllers or by means of operating elements, such as pushbuttons from
Eaton's RMQ series.
If the supply voltages of the controller or pushbutton are connected to a different 24 V DC potential than the
PXS24, a ground connection must be established.
In all the circuit examples listed below, the protective devices have been omitted for the sake of simplicity.
If used, the PXS24 outputs must always be protected against voltage peaks by suitable means (surge protection
diode, etc.), especially when switching relays.

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7.5.1 External switching –signal path
During external switching, the PXS24 will be used as a relay, provided there is no overload on the outputs.
The path highlighted in white can be controlled by the user; the paths highlighted in gray will change in line with the
changes to the white path.
7.5.2 External reset –signal path
After the PXS24 has switched off due to an overload, it can be reset remotely.
The applied trigger signal must be at “high” level for at least 200 ms.
The path highlighted in white can be controlled by the user; the paths highlighted in gray will change in line with the
changes to the white path.

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7.5.3 Status monitoring via an external controller
To monitor the status of the PXS24 remotely, one of the PXS24 outputs (pin 5 or 6) can be connected directly to the
input of a variety of controllers.
7.5.4 Switching via an external controller
To switch the PXS24 remotely, one of the PXS24 inputs (pin 7 or 8) can be connected directly to a controller output.
With this type of connection the PXS24 can also be used as a protective relay.
7.5.5 Full control via an external controller (monitoring and switching)
The PXS24 can be fully monitored via a controller if one of its inputs (pin 7 or 8) is connected to a controller output
and one of its outputs (pin 5 or 6) is connected to a controller input. With this type of connection the PXS24 can also
be used as a protective relay.
7.5.6 Reset with pushbutton –power supply via the PXS24
To be able to reset the PXS24 without an external controller and without any external voltage in the event of a fault,
a pushbutton or relay contact (normally open, NO) can be connected between one of its outputs (pin 5 or 6) and one
of its inputs (pin 7 or 8).

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7.5.7 Reset with pushbutton or relay –power supply via external voltage
To be able to reset the PXS24 via an external power supply in the event of a fault, one of its inputs (Pin 7 or 8) can be
connected to a relay or pushbutton contact (NO).
7.5.8 Overcurrent indication via signal element
To control a signal element without an external controller in the event of a fault, the signal element can be connected
to a PXS24 output (pin 5 or 6) and to the ground terminal of the communication port.
7.5.9 Overcurrent status transfer via relay
Status transfer via relay can be used for potential-free switching.
This also makes it possible to switch off circuits with voltages other than 24 V DC.