IFM ANT420 User manual

Operating instructions
RF-identification system
ANT420
ANT421
Read/write head
11455007 / 0007 / 2022
GB

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Contents
1 Preliminary note.............................................................................................. 3
1.1 Symbols used .......................................................................................... 3
1.2 Warnings used......................................................................................... 3
1.3 Legal and copyright information............................................................... 3
2 Safety instructions .......................................................................................... 3
3 Intended use ................................................................................................... 4
4 Items supplied................................................................................................. 5
5 Function .......................................................................................................... 5
5.1 ID tags ..................................................................................................... 5
5.2 Device overview....................................................................................... 5
6 Installation....................................................................................................... 6
6.1 Notes on the unit installation.................................................................... 6
6.2 Avoiding interference ............................................................................... 6
6.3 Mechanical design ................................................................................... 7
6.4 Install device ............................................................................................ 7
6.5 Mounting distances.................................................................................. 9
6.6 Positioning of the ID tags......................................................................... 10
7 Electrical connection....................................................................................... 12
7.1 Wiring....................................................................................................... 12
8 Operating and display elements ..................................................................... 13
9 Maintenance, repair and disposal................................................................... 13
10 Approvals/standards ....................................................................................... 14
Glossary.......................................................................................................... 15

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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
1.2 Warnings used
ATTENTION
Warning of damage to property
1.3 Legal and copyright information
© All rights reserved by ifm electronic gmbh. No part of these instructions may be
reproduced and used without the consent of ifm electronic gmbh.
All product names, pictures, companies or other brands used on our pages are the
property of the respective rights owners.
2 Safety instructions
General
• 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

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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.
Radio equipment
In general, radio equipment must not be used in the vicinity of petrol stations, fuel
depots, chemical plants or blasting operations.
uDo not transport and store any flammable gases, liquids or explosive
substances near the unit.
Interference of electronic and medical devices
Operation can affect the function of electronic devices that are not correctly
shielded.
uDisconnect the device in the vicinity of medical equipment.
uContact the manufacturer of the corresponding device in case of any
interference.
3 Intended use
The read/write head reads and writes ID tags without contact. For use, the read/
write head must be connected to the DTE10x evaluation unit.

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The data is converted into digitally coded values and provided to the evaluation
unit.
4 Items supplied
• Read/write head
• 2x hexagonal nut
The device is supplied without installation and connection accessories.
Available accessories: www.ifm.com.
The optimum function is not ensured when using components from other
manufacturers.
5 Function
5.1 ID tags
The ID tags are passively operated without a battery. The energy required for
operation is provided by the read/write head.
The energy is provided via an inductive coupling. The integrated antenna coil in
the read/write head generates a magnetic field which partly penetrates the
antenna coil of the ID tag. A voltage is generated by induction that supplies the
data carrier with energy.
The device supports ID tags according to ISO 15693.
5.2 Device overview
ANT420
Article number: ANT420
Function: Read/write head
Type designation: DTRHF GBRWIDUS03
Type: M18, flush mountable

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ANT421
Article number: ANT421
Function: Read/write head
Type designation: DTRHF GNRWIDUS03
Type: M18, non flush mountable
6 Installation
6.1 Notes on the unit installation
When mounting several RFID units adhere to the minimum distances
between the systems.
Flush mounting of a read/write head in metal reduces the read/write
distance.
Device performance can be affected if positioned in the immediate vicinity
of powerful HF emission sources such as welding transformers or
converters.
6.2 Avoiding interference
The device generates a modulated electrical field with a frequency of 13.56 MHz.
Avoid interference with data communication:
uDo not operate any devices in the vicinity that use the same frequency band.
wSuch devices are for example frequency converters and switched-mode power
supplies.
If there are other devices in the same frequency band in the vicinity:
uThe mounting distances between the devices should be as large as possible.
uUse the devices in alternating operation.
uSwitch the HF field of the device on/off.

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6.3 Mechanical design
ANT420
Fig.1: ANT420
1 Sensing face
ANT421
Fig.2: ANT421
1 Sensing face
6.4 Install device
uFix the device using the supplied nuts (M18).

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ANT420
Fig.3: Flush mounting.
ANT421
Fig.4: Non flush mounting

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6.5 Mounting distances
ANT420
Operating mode Distance side (A) Distance front (B)
For reading and writing ≥ 60 mm ≥ 100 mm

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ANT421
Operating mode Distance side (A) Distance front (B)
For reading and writing ≥ 90 mm ≥ 180 mm
6.6 Positioning of the ID tags
The read/write heads are marked with an antenna symbol on the sensing
face. It designates the middle of the integrated antenna coil and has to
correspond with the middle of the ID tag.
uAlign the axes of the RFID device and the ID tag in the same way.
For installation in or on metal use the ID tags provided for this purpose.
Position the ID tag in the area of the sensing face. When doing so, the
angle of aperture and the operating distance must be adhered to (→ Data
sheet of the device).

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ANT420
D
Fig.5: Position the ID tag
uAlign the ID tag on the central axis of the antenna of the device.
ID tag Type Distance read/write head
(D) in plastic
E80371 16 mm
The indications in the table apply to static read/write operations.
ANT421
D
Fig.6: Position the ID tag
uAlign the ID tag on the central axis of the antenna of the device.

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ID tag Type Distance read/write head
(D) in plastic
E80371 40 mm
The indications in the table apply to static read/write operations.
7 Electrical connection
The device must be connected by a qualified electrician.
Device of protection class III (PC III).
The electrical supply must only be made via PELV/SELV circuits.
uDisconnect power before connecting the device.
7.1 Wiring
uConnect the unit to a DTE10x evaluation unit via the M12 connector.
wVoltage is supplied via the evaluation unit.
Pin assignment Wiring
4
1
3
L+
1
3
4
L
DATA
Information on available sockets see: www.ifm.com.
Cables with the following characteristics are suitable for the connection:
Length Ohmic resistance (feed +
return line) Effective cable capacity
< 20 m max. 3 Ω max. 3 nF

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8 Operating and display elements
ANT420 ANT421
1
1
1 LED green: operating voltage
LED yellow: ID tag
LED State Description
green on operating voltage OK
off operating voltage missing
flashing slowly deactivated
yellow on (permanently) ID tag detected
on (pulse) ID tag read/written success-
fully
flashing quickly error when reading/writing
on ID tag
off • no ID tag in the field
• faulty ID tag in the field
• invalid ID tag in the field
green and yellow flashing alternately error in communication or
device fault
9 Maintenance, repair and disposal
The unit is maintenance-free.

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uContact ifm in case of malfunction.
uDo not open the housing as the unit does not contain any components which
can be maintained by the user. The unit must only be repaired by the
manufacturer.
uClean the device using a dry cloth.
uDispose of the unit in accordance with the national environmental regulations.
10 Approvals/standards
For approvals and standards, the following information is available:
• Test standards and regulations: documentation.ifm.com
• EU declaration of conformity and approvals: documentation.ifm.com
• Notes relevant for approval: package inserts of the device

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Glossary
ID tag
An ID tag is used to identify
objects. A read/write device is
used to read the ID tag via a
high-frequency radio signal. An
ID tag consists of an antenna,
an analogue circuit for
receiving and transmitting
(transceiver), a digital circuit
and a non-volatile memory.