DF1220 - Circuit breakers IFM - Free user manual and instructions

USER MANUAL DF1220 IFM

Operating instructions

Electronic circuit breakers, standard for the 24 V DC secondary circuit

DF11xx

DF12xx

DF25xx

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

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

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 (→ 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.

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.

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 protection 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
Fail-safe IN		[A]		8	10	2	4	6.3	16	16
	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 → Installation				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 × I_N " 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 I_N of the respective circuit protection module and the respective wire cross-sections.

5 Installation

▶ Mount the devices on a 35 mm rail.

Fig. 1: Example circuit protection module DF12xx

1: Rail
2: Contact lever
3: Installation area
4: Operating area

6 Electrical connection

▶ Dimension cables according to input and output current.
▶ Insert 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.

7 Operating and display elements

Fig. 2: Example DF11xx supply module

1: Panel for labelling
2: Push-in terminals switching output 13/14
3: Push-in terminal 0 V
4: Push-in terminal 24 V DC

Fig. 3: Example DFx2xx circuit protection module

1: Panel for labelling
2: ON/OFF/reset button and status LED (channel 2)
3: ON/OFF/reset button and status LED (channel 1)
4: Push-in terminals outputs 1/2

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 channel 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.

▶ Press the ON/OFF/reset button of the requested channel between 2 and 5 seconds.
▷ The status LED of the selected channel flashes red once.
▷ The 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.).
▷ The set nominal current is displayed five times. After 5 cycles the display changes to the current operating status.
▶ To 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.

7.3 Setting of the nominal current

Only for circuit protection modules with adjustable nominal current.

▶ Press the ON/OFF/reset button of the requested channel min. 5 seconds.

▷ The status LED of the selected channel flashes red once.
▷ The status LED slowly flashes green, max. 10 times, then red once.

▶ Press 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.).

▷ The selected nominal current is set for this channel.

▷ Display changes to the current operating status.

8 Maintenance, repair and disposal

The operation of the unit is maintenance-free.

Only the manufacturer is allowed to repair the unit.

▶ After use dispose of the device in an environmentally friendly way in accordance with the applicable national regulations.

Cleaning the unit:

▶ Disconnect the unit from the voltage supply.

▶ Clean the unit from dirt using a soft, chemically untreated and dry micro-fibre cloth.