Siemens SITOP SEL1200 8 x 5 A Technical Document

SITOP power supply
SITOP SEL1200-1400
Equipment Manual
SITOP SEL1200 8 x 5 A
6EP4437
-7FB00-3DX0
SITOP SEL1200 4 x 10 A
6EP4437
-7FB00-3CX0
SITOP SEL1200 8 x 10 A
6EP4438
-7FB00-3DX0
SITOP SEL1400 8 x 5 A
6EP4437
-7EB00-3DX0
SITOP SEL1400 4 x 10 A
6EP4437
-7EB00-3CX0
SITOP SEL1400 8 x 10 A
6EP4438
-7EB00-3DX0
06.2020
A5E46496083
-2-76
Overview
Safety instructions
1
Description, device design,
dimension drawing
2
Mounting/removal
3
Mounting position, mounting
clearances
4
Installation
5
Technical data
6
Safety, approvals, EMC
7
Ambient conditions
8
Environment
9
Service & Support
10

Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E46496083-2-76
Ⓟ
06/2020 Subject to change
Copyright © Siemens AG 2020.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury
may
result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
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may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 3
Overview
Description
In conjunction with a 24 Vpower supply, the selectivity module is used to distribute the load
current across several branches and to monitor the individual currents inthese branches.
Faults in the individual branches caused by overload or short-circuit aredetected and
selectively switched off, so that the fault does notimpact the other load circuits. This means
fast troubleshooting and minimized downtimes.
SEL1200 assumes loads that correspond to the PLC standard and can therefore
automatically buffer a voltage-free period of 10 ms. At the time of shutdown, the current
cannot be briefly limited, and as a consequence brief voltage dips below 20 Vare possible.
SEL1400 is designed for demanding applications, anddoes not permit voltage dips below
20 V for any period of time. This isalso suitable for loads/consumers that do not comply with
the PLC standard.
The key benefits of the product include:
●Amaximum of 8 load branches are monitored for each module
●The response threshold can be continually set for each output using a potentiometer
●Overcurrents are reliably switched off, independent of the cable length and cable cross-
section
●The 24 V supply for the other loads is maintained
●2 adjacent outputs can be connected in parallel to increase the power rating (for max.
15 A)

Overview
SITOP SEL1200-1400
4Equipment Manual, 06.2020, A5E46496083-2-76
●Fast fault diagnostics using:
–Multi-colored LEDs for each output for faster troubleshooting on-site
–You can toggle between group message and single-channel diagnostics
●Floating group signal contact for remote diagnostics
●Single-channel signal using the diagnostics interface to serially signal the state of the
individual outputs
●Evaluation using free of charge SIMATIC S7 function blocks (S7-1200/1500)
●It can be selected that the load branches are sequentially switched on to reduce the total
inrush current
●Narrow design
●Push-in terminals

Overview
SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 5
Ordering data
The following device options are available:
Selectivity modules
Type
Order number
SITOP SEL1200 8 × 5 A
24 V DC input
Number of outputs: 8
Setting range of the response threshold: 1 - 5 A
with group signaling contact
6EP4437-7FB00-3DX0
SITOP SEL1200 4 × 10 A
24 V DC input
Number of outputs: 4
Setting range of the response threshold: 2 - 10 A
with group signaling contact
6EP4437-7FB00-3CX0
SITOP SEL1200 8 × 10 A
24 V DC input
Number of outputs: 8
Setting range of the response threshold: 2 - 10 A
with group signaling contact
6EP4438-7FB00-3DX0
SITOP SEL1400 8 × 5 A
24 V DC input
Number of outputs: 8
Setting range of the response threshold: 1 - 5 A
with group signaling contact
6EP4437-7EB00-3DX0
SITOP SEL1400 4 × 10 A
24 V DC input
Number of outputs: 4
Setting range of the response threshold: 2 - 10 A
with group signaling contact
6EP4437-7EB00-3CX0
SITOP SEL1400 8 × 10 A
24 V DC input
Number of outputs: 8
Setting range of the response threshold: 2 - 10 A
with group signaling contact
6EP4438-7EB00-3DX0
Accessories
Type
Order number
Reference labeling plate (160 plates)
6ES7193-6LF30-0AW0

Overview
SITOP SEL1200-1400
6Equipment Manual, 06.2020, A5E46496083-2-76
Validity
This manual provides information on the following products:
●Selectivity module SITOP SEL1200 8 × 5 A
Article number: 6EP4437-7FB00-3DX0
Product state: 1
●Selectivity module SITOP SEL1200 4 × 10 A
Article number: 6EP4437-7FB00-3CX0
Product state: 1
●Selectivity module SITOP SEL1200 8 × 10 A
Article number: 6EP4438-7FB00-3DX0
Product state: 1
●Selectivity module SITOP SEL1400 8 × 5 A
Article number: 6EP4437-7EB00-3DX0
Product state: 1
●Selectivity module SITOP SEL1400 4 × 10 A
Article number: 6EP4437-7EB00-3CX0
Product state: 1
●Selectivity module SITOP SEL1400 8 × 10 A
Article number: 6EP4438-7EB00-3DX0
Product state: 1

SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 7
Table of contents
Overview................................................................................................................................................. 3
1 Safety instructions................................................................................................................................... 9
1.1 General safety instructions .......................................................................................................9
1.2 Safety instructions for hazardous zones.................................................................................10
2 Description, device design, dimension drawing...................................................................................... 11
2.1 Device description...................................................................................................................11
2.2 Connections and terminal designation....................................................................................13
2.3 Potentiometer..........................................................................................................................15
2.4 Status displays and signaling .................................................................................................16
2.5 Buttons and selector switches ................................................................................................19
2.6 Electronic overload shutdown and reset.................................................................................21
2.7 Setting the switch-on delay time .............................................................................................24
2.8 Block diagram .........................................................................................................................25
2.9 Dimensions and weight...........................................................................................................26
3 Mounting/removal ................................................................................................................................. 29
4 Mounting position, mounting clearances................................................................................................ 31
4.1 Standard mounting position ....................................................................................................31
4.2 Other mounting positions........................................................................................................34
4.2.1 SEL1200 8 x 5 A 6EP4437-7FB00-3DX0...............................................................................34
4.2.2 SEL1200 4 x 10 A 6EP4437-7FB00-3CX0.............................................................................36
4.2.3 SEL1200 8 x 10 A 6EP4438-7FB00-3DX0.............................................................................38
4.2.4 SEL1400 8 x 5 A 6EP4437-7EB00-3DX0...............................................................................40
4.2.5 SEL1400 4 x 10 A 6EP4437-7EB00-3CX0.............................................................................42
4.2.6 SEL1400 8 x 10 A 6EP4438-7EB00-3DX0.............................................................................44
5 Installation ............................................................................................................................................ 47
5.1 Connection at the input...........................................................................................................47
5.2 Connection at the output.........................................................................................................49
6 Technical data ...................................................................................................................................... 51
6.1 Input ........................................................................................................................................51
6.2 Output .....................................................................................................................................52
6.3 Efficiency.................................................................................................................................54
6.4 Protection and monitoring.......................................................................................................54
6.5 MTBF ......................................................................................................................................54

Table of contents
SITOP SEL1200-1400
8Equipment Manual, 06.2020, A5E46496083-2-76
6.6 Mechanical system ................................................................................................................ 55
6.7 Accessories............................................................................................................................ 55
6.8 Dimension drawing ................................................................................................................ 56
7 Safety, approvals, EMC ........................................................................................................................ 57
7.1 Safety ..................................................................................................................................... 57
7.2 Approvals ............................................................................................................................... 57
7.3 EMC ....................................................................................................................................... 58
8 Ambient conditions................................................................................................................................ 59
9 Environment ......................................................................................................................................... 61
10 Service & Support ................................................................................................................................. 63

SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 9
Safety instructions
1
1.1 General safety instructions
WARNING
Correct handling of the devices
When operating electrical devices, it is inevitable that certain components will carry
dangerous voltages.
Therefore, failure to handle the units properly can result in death or serious physical injury
as well as extensive property damage.
Only appropriately qualified personnel may work on or in the vicinity of this equipment.
Perfect, safe, and reliable operation of this equipment is dependent on proper
transportation, storage, installation and mounting.
Before installation or maintenance work can begin, the system's main switch must be
switched off and measures taken to prevent it being switched on again.
If this instruction is not observed, touching live parts can result in death or serious injury.

Safety instructions
1.2 Safety instructions for hazardous zones
SITOP SEL1200-1400
10 Equipment Manual, 06.2020, A5E46496083-2-76
1.2 Safety instructions for hazardous zones
The devices comply with ATEX directive 2014/34/EU; EN 60079-0; EN 60079-7.
WARNING
OPERATE POTENTIOMETERS OR SWITCHES IN NON-HAZARDOUS AREAS ONLY!

SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 11
Description, device design, dimension drawing
2
2.1 Device description
Using the selectivity module, a 24 V DC output voltage from a regulated power supply can
be distributed across four or eight load circuits. The response threshold of the output current
can be individually set for each output using a potentiometer. When the set response
threshold is exceeded, the output is automatically switched off according to a defined switch
off characteristic, and can be switched on again after a wait time using a pushbutton
(ON/OFF/RST) or remote reset (RST). The status of the output is displayed using a multi-
color LED for each output. The status of the outputs can be processed via a group signaling
contact (13, 14) or via a serial single-channel signal.
NOTICE
In addition to the energy demand for continuous operation of the application, an adequate
energy reserve must be taken into consideration for tripping according to the l²t
characteristic if a fault occurs.

Description, device design, dimension drawing
2.1 Device description
SITOP SEL1200-1400
12 Equipment Manual, 06.2020, A5E46496083-2-76
①
+24 V DC input
②
0 V connection for the internal supply
③
+24 V DC outputs
④
Group signaling contact (13, 14); not assigned (NF); remote reset (RST)
⑤
Potentiometer for each output
⑥
(ON/OFF/RST) pushbutton and indicator light for each output
⑦
Selector switch for diagnostic interface (COM)
⑧
Selector switch for switch-in delay (time definition) (TD1, TD2)
⑨
Mounting rail slider
⑩
Natural convection
⑪
Clearance above/below
Figure 2-1 Design

Description, device design, dimension drawing
2.2 Connections and terminal designation
SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 13
2.2 Connections and terminal designation
The input terminals ①can be used to establish the connection to the supply voltage. The
"0 V" connection ②is used to supply the internal electronics. The output terminals ③are
used to connect to the loads to be supplied (see also Chapter Installation (Page 47)).
The operating state of the device can be processed using the group signal contact ④(for
the function and content rating, see Figure 2-4 Status displays and signaling (Page 16)).
The remote reset (RST) input ④is used to reset outputs that have automatically been shut
down (function, see Chapter Status displays and signaling (Page 16)).
Connections and terminal designations
①
24 V DC input 2 spring-loaded terminals
②
0 V connection for the internal supply 2 spring-loaded terminals
③
24 V DC output: 1 - 4 (1 - 8) one spring-loaded terminal each
④
Group signaling contact (13, 14); not as-
signed (NF); remote reset (RST)
one spring-loaded terminal each
*1) Do not subject the end stop to higher loads
*2)
8 mm of insulation has to be stripped when using conductor end sleeves
Figure 2-2 Terminal data
The terminal location must first be opened for smaller conductor cross-sections and for
flexible conductors without conductor end sleeves.To do this, an appropriate slotted
screwdriver mustbe inserted into the square slot at the appropriate connection.
We recommend the CRIMPFOX 6 - 1212034 crimping tool to crimp conductor end sleeves. If
the conductor end sleeve is longer than the permissible length of the crimping tool, then the
end sleeve must be crimped in several steps.
Applying pulling and lateral forces to the terminal should be avoided.

Description, device design, dimension drawing
2.2 Connections and terminal designation
SITOP SEL1200-1400
14 Equipment Manual, 06.2020, A5E46496083-2-76
NOTICE
Overload of the wiring
The "0 V" connection is only used to supply the internal electronics of the selectivity
module. The 0 V of the connected loads must be routed directly to the power supply using
separate cables!

Description, device design, dimension drawing
2.3 Potentiometer
SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 15
2.3 Potentiometer
The potentiometer ⑤on the front of the device is used to set the response threshold of the
output current. When delivered, the maximum possible response threshold is set.
Figure 2-3 Potentiometer
Note
It is only permissible to use an insulated screwdriver when actuating the potentiometer.
For information on actuating the potentiometer (screwdriver, torque), see Figure 2-2
Terminal data (Page 13).

Description, device design, dimension drawing
2.4 Status displays and signaling
SITOP SEL1200-1400
16 Equipment Manual, 06.2020, A5E46496083-2-76
2.4 Status displays and signaling
6EP4437-7FB00-3DX0
6EP4437-7FB00-3CX0
6EP4438-7FB00-3DX0
6EP4437-7EB00-3DX0
6EP4437-7EB00-3CX0
6EP4438-7EB00-3DX0
Group signal contact (13, 14)
④
floating relay contact (NO contact),
contact rating: 24 V AC/0.1 A; 30 V DC/0.1 A
NOTICE: It is not permissible that the signaling contact is connected to the line
voltage!
Remote reset (RST)
④
non-isolated 24 V DC input
Signal level "High" for > 15 V
Indicator light and pushbutton
(ON/OFF/RST) for each output
⑥
Three-color LED: rot, green and orange
Selector switch for diagnostic interface
(COM)
⑦
Switchover between signaling the status of the output channels and communi-
cation at the signaling contact.
Figure 2-4 Status displays and signaling
The operating state of the outputs is displayed using multi-color LEDs at the front of the
device. Symbols indicate the significance of each LED, which are listed in the following table.
LED off
LED is continuously lit
LED flashes

Description, device design, dimension drawing
2.4 Status displays and signaling
SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 17
Indicator light (LED 1 - 4 (1 - 8)) ⑥, signaling contact (13, 14) ④and selector switch for
diagnostics interface (COM) ⑦
Signaling
6EP4437-7FB00-3DX0
6EP4437-7FB00-3CX0
6EP4438-7FB00-3DX0
6EP4437-7EB00-3DX0
6EP4437-7EB00-3CX0
6EP4438-7EB00-3DX0
Off All LEDs:
•No supply voltage
•Device powering up: After the device has powered up, the out-
puts are switched on, taking into consideration the switch-on de-
lay that has been set.
LED, individual output:
Output defective (internal fuse has ruptured)
Lights up green
Normal operation, output is switched on
Flashes green The output current is in the overload range according to the shut-
down characteristic (see Chapter Electronic overload shutdown and
reset (Page 21))
Overload at the output: Output current 100 - 150 % of the response
threshold (permissible for 5 s)
Flashes orange Output manually switched off using pushbutton (ON/OFF/RST) ⑥:
The state is saved when the device is switched off, and can only be
reset again by pressing the up button again.
Lights up red Output is automatically shut down due to overload or external over-
voltage > typ. 30 V/100 ms. The output can be switched on again
after a typical wait time of 20 s. The wait time still to elapse is saved
when switching off the device – and is reactivated after the device
has been switched on again.
Flashes red Output ready to be reset after an automatic switch off by actuating
the (ON/OFF/RST) ⑥or remote reset (RST) ④(effective for all
outputs that have been automatically switched off)
... all LEDs indi-
vidually flash
red
Overload - total max. output current exceeded, after max. 30 s out-
puts are successively switched off (4 →3 →2 →… (8 →7 →6 →…))
until there is no longer an overload condition.
Red running
light
Device overtemperature: The outputs can be switched-on again once
the temperature is in the normal range.
Contact (13, 14) (NO con-
tact):
Contact rating: 24 V AC/0.1 A; 30 V DC/0.1 A
NOTICE: It is not permissible that the signaling contact is connected
to the line voltage!
closed :
for COM = '0': all outputs active
for COM = '1': Data transfer
Selector switch for diagnostic
interface (COM)
Switchover between signaling the status of the output channels and
communication at the signaling contact.
'0': Displays the status of the output channels
'1': Internal device parameters are transferred via the signaling con-
tact
Signaling contact
'1' = 24 V DC / '0' = 0 V (pull down)

Description, device design, dimension drawing
2.4 Status displays and signaling
SITOP SEL1200-1400
18 Equipment Manual, 06.2020, A5E46496083-2-76
If the selector switch for the diagnostics interface (COM) is at 0, then signal contact ④is
only closed if all channels are in the LED state "green", "green flashing" or "orange flashing".
Additional information about the data transfer (COM = 1) is provided in the documents:
●Diagnostics interface (https://support.industry.siemens.com/cs/ww/en/view/109767425)
●Faceplates and communication blocks
(https://support.industry.siemens.com/cs/ww/en/view/109763709)

Description, device design, dimension drawing
2.5 Buttons and selector switches
SITOP SEL1200-1400
Equipment Manual, 06.2020, A5E46496083-2-76 19
2.5 Buttons and selector switches
Figure 2-5 Buttons and selector switches
Buttons (ON/OFF/RST) ⑥for the selectivity module SITOP SEL1200-1400 fulfill the
following two functions:
1. manually switching an output off and on (see the following).
2. resetting an output automatically switched off due to an overload condition (see Chapter
Electronic overload shutdown and reset (Page 21)).
Using selector switch COM ⑦, at the message contact (13, 14) ④you can toggle between
signaling the state of the output channels and the communication at the signaling contact.
COM = 0: Displays the status of the output channels
COM = 1: Internal device parameters are transferred via the signaling contact (diagnostics
interface)
Selector switches (TD1, TD2) ⑧can be used to select the delay time when switching on the
individual outputs (see Chapter Setting the switch-on delay time (Page 24)).

Description, device design, dimension drawing
2.5 Buttons and selector switches
SITOP SEL1200-1400
20 Equipment Manual, 06.2020, A5E46496083-2-76
Manually switching an output on and off
An individual output can be switched on and switched off using the button
(ON/OFF/RST) ⑥. When the device is delivered, the outputs are manually switched off.
Switching off an output:
For outputs that are switched on, LED ⑥of the particular output is lit green. You can switch
off the output by pressing the assigned button (ON/OFF/RST) ⑥. The LED then flashes
orange (output has been manually switched off).
Switching on an output:
For outputs that have been manually switched off, LED ⑥of the particular output is lit
orange. You can switch on the output by pressing the assigned button (ON/OFF/RST) ⑥.
The LED is then lit green (output is switched on).
Note
An output that has been manually switched
-off can only be manually switched-on again by
manually pressing the button again. It is not possible to switch on an output that has been
manually
switched off using the remote reset signal (RST) ④.
An output that
has been manually switched off remains saved (latch) even when the supply
voltage is no longer available, and is a manually switched off when the supply voltage
returns.