IFM DF11 Series User manual

Operating instructions
Electronic circuit breakers, standard
for the 24 V DC secondary circuit
DF11xx
DF12xx
DF25xx
11367179 / 0009 / 2022
GB

DF11xx DF12xx DF25xx Electronic circuit breakers, standard
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Contents
1 Preliminary note ............................................................. 3
1.1 Symbols used.......................................................... 3
2 Safety instructions............................................................ 4
3 Intended use................................................................ 5
4 Function ................................................................... 6
4.1 Temperature factor / continuous current rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Fail-safe element ....................................................... 6
5 Installation.................................................................. 7
6 Electrical connection.......................................................... 8
6.1 Supply, feedback and potential modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7 Operating and display elements................................................. 9
7.1 DF12xx circuit protection modules .......................................... 9
7.2 Interrogation of module to confirm the set nominal current . . . . . . . . . . . . . . . . . . . . . . . . 9
7.3 Setting of the nominal current.............................................. 10
8 Maintenance, repair and disposal................................................ 11

Electronic circuit breakers, standard DF11xx DF12xx DF25xx
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1 Preliminary note
You will find instructions, technical data, approvals and further information using the QR code on the
unit / packaging or at www.ifm.com.
1.1 Symbols used
Requirement
Instructions
Reaction, result
[...] Designation of keys, buttons or indications
Cross-reference
Important note
Non-compliance may result in malfunction or interference.
Information
Supplementary note

DF11xx DF12xx DF25xx Electronic circuit breakers, standard
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2 Safety instructions
• The unit described is a subcomponent for integration into a system.
– The system architect is responsible for the safety of the system.
– The system architect undertakes to perform a risk assessment and to create documentation in
accordance with legal and normative requirements to be provided to the operator and user of
the system. This documentation must contain all necessary information and safety instructions
for the operator, the user and, if applicable, for any service personnel authorised by the
architect of the system.
• Read this document before setting up the product and keep it during the entire service life.
• The product must be suitable for the corresponding applications and environmental conditions
without any restrictions.
• Only use the product for its intended purpose (Ò Intended use).
• If the operating instructions or the technical data are not adhered to, personal injury and/or damage
to property may occur.
• The manufacturer assumes no liability or warranty for any consequences caused by tampering with
the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the product must be
carried out by qualified personnel authorised by the machine operator.
• Protect units and cables against damage.
• Replace damaged units, otherwise the technical data and safety will be impaired.
• The devices are intended for use with a 24 V DC safety extra-low voltage.
• A wrong connection to voltage which is higher and/or not safely isolated may lead to damage or
conditions which are dangerous to life.
• Use the supply module only with the matching circuit protection modules.
• Do not mount the devices and do not actuate the contact levers while live.
• After triggering a circuit protection module and before power on again, remove the cause of
triggering (short circuit or overload).
• Check the devices for damage prior to installation. Defective devices must not be used.
• Supply the devices with energy only after they have been properly installed.

Electronic circuit breakers, standard DF11xx DF12xx DF25xx
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3 Intended use
Electronic overcurrent protection for primary switched-mode 24V DC power supplies. A supply module
must be combined with at least one circuit protection module and, optionally, complemented by
supply/feedback/potential modules.

DF11xx DF12xx DF25xx Electronic circuit breakers, standard
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4 Function
The circuit protection modules are available with either fixed or adjustable currents and are equipped
with a fail-safe element (integrated fuse).
DF1100 DF1208 DF1210 DF1212 DF1214 DF1216 DF1220 DF2520 DF2524
Supply module ● —
Circuit protection module — ●
Interface — — IO-Link
Max. number of circuit pro-
tection modules per supply
module
— 10
Electrical data
Input voltage [V] 18...30 DC (SELV/PELV)
Nominal voltage [V] 24 DC
NEC Class 2 — — — ● ● — — ● ●
Input current
(= max. total current)
[A] 40 —
Number of channels — 1 2
Nominal current IN[A] 8 10 2 4 6 1…10 1…10 1…4
Fail-safe IN[A] 8 10 2 4 6.3 16 16 4
Mechanical data
Installation rail TH35 (to EN 60715)
Device width [mm] 12.5
Ambient temperature [°C] -25...60
Storage temperature [°C] -40...70
Protection rating Ò Installa-
tion
IP 30 (installation area)
IP 20 (operating area)
Electrical connection
Type push-in terminals, contact lever/strip
● = applicable
4.1 Temperature factor / continuous current rating
The time-current characteristic curve depends on the ambient temperature. To determine the max.
permitted load current multiply the nominal device current by the temperature factor taking into
consideration the series connection.
Ambient temperature [°C] 0 10 23 40 50 60
Temperature factor 1 1 1 0.95 0.90 0.85
With series installation the nominal device current can be max. 80% or has to be overdimensioned
accordingly. With increased temperature the load current warning limit "warning limit typ. 0.8 x IN" is
reduced by the temperature factor.
4.2 Fail-safe element
The load circuits are additionally protected by the circuit protection modules that are equipped with a
fail-safe element (integrated fuse). The fail-safe element is adapted to the nominal current IN of the
respective circuit protection module and the respective wire cross-sections.

Electronic circuit breakers, standard DF11xx DF12xx DF25xx
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5 Installation
uMount the devices on a 35 mm rail.
2
34
1
Fig.1: Example circuit protection module DF12xx
1: Rail
2: Contact lever
3: Installation area
4: Operating area

DF11xx DF12xx DF25xx Electronic circuit breakers, standard
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6 Electrical connection
uDimension cables according to input and output current.
uInsert wires directly into the terminals as shown on the device label.
Art. no. Terminals Potential Cross-section [mm²] Stripping length [mm]
DF11xx 24 V DC supply 0.5...10 18
0 V 0.14...2.5 8…10
13-14 normally open 0.14...2.5 8…10
DF12xx O1 or O1/O2 current outputs 0.14...2.5 8…10
To disconnect press the orange pusher using a suitable tool.
To open the push-in terminals IO-Link use a 2 mm wide micro screwdriver.
As soon as the supply module is supplied with voltage, the device closes the contacts
connected to terminals 13 and 14. If a fault occurs at one (or several) of the connected
channels, the device opens the contacts again.
6.1 Supply, feedback and potential modules
In combination with GND potential modules (DF311x) the GND supply modules (DF310x) are used to
reduce wiring.
In order to avoid that subsequent modules are disconnected from the voltage supply when opening a
contact lever, a feedback module (DF3210) can be used to ensure that the respective modules are still
supplied with power.
A LOAD potential module (DF320x) is used to extend +24 V DC circuit protection outputs to other
connections.

Electronic circuit breakers, standard DF11xx DF12xx DF25xx
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7 Operating and display elements
2
3
4
1
Fig.2: Example DF11xx supply module
2
3
4
1
Fig.3: Example DFx2xx circuit protection module
7.1 DF12xx circuit protection modules
The different operating states of the circuit protection modules are indicated by the status LED.
Status LED Operating status Status of load output
— off Missing operating voltage, error in initialisation or chan-
nel switched off via button
off
green on Channel switched on, no fault on
green/orange flashing Load current limit reached on
orange on Overload or short circuit until disconnection on
Channel switched off off
red on Triggering via short circuit or overload off
Undervoltage in ON status with automatic switching on
again
Tab.1: Status LED DF12xx circuit protection modules
7.2 Interrogation of module to confirm the set nominal current
Only for circuit protection modules with adjustable nominal current.
uPress the ON/OFF/reset button of the requested channel between 2 and 5 seconds.
wThe status LED of the selected channel flashes red once.
wThe status LED flashes orange to display the set nominal current. The LED flashes red once to
confirm completion of the cycle. The LED flashes orange, once or multiple times, in accordance
with nominal current setting in amperes (orange flashing once = 1 A; orange flashing twice = 2 A;
etc.).
wThe set nominal current is displayed five times. After 5 cycles the display changes to the current
operating status.
uTo interrupt/stop the interrogation cycle, and return to normal status indication mode, press the ON/
OFF/reset button of the requested channel at any time.

DF11xx DF12xx DF25xx Electronic circuit breakers, standard
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7.3 Setting of the nominal current
Only for circuit protection modules with adjustable nominal current.
uPress the ON/OFF/reset button of the requested channel min. 5 seconds.
wThe status LED of the selected channel flashes red once.
wThe status LED slowly flashes green, max. 10 times, then red once.
uPress the ON/OFF/reset button of this channel when the LED signals the requested nominal
current value (after the first time flashing green = 1A; after the second time flashing green = 2A;
etc.).
wThe selected nominal current is set for this channel.
wDisplay changes to the current operating status.

Electronic circuit breakers, standard DF11xx DF12xx DF25xx
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8 Maintenance, repair and disposal
The operation of the unit is maintenance-free.
Only the manufacturer is allowed to repair the unit.
uAfter use dispose of the device in an environmentally friendly way in accordance with the
applicable national regulations.
Cleaning the unit:
uDisconnect the unit from the voltage supply.
uClean the unit from dirt using a soft, chemically untreated and dry micro-fibre cloth.