HID Hi-O iCLASS Installation Guide

15370 Barranca Parkway

Irvine, CA 92618

iCLASS OEM75

INTEGRATION GUIDE

3141-907, Rev. B.0

January 2014

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

Contents

1 Overview ................................................................................................................................... 5

1.1 Introduction ........................................................................................................................................ 5

1.2 References ........................................................................................................................................ 5

1.3 Ordering ............................................................................................................................................. 5

2 Getting Started ......................................................................................................................... 6

2.1 Theory of Operation ........................................................................................................................... 6

2.2 Peripheral Circuits ............................................................................................................................. 7

2.2.1 External Noise Filter ...............................................................................................................................7

2.2.2 Adding External LEDs or Beeper ............................................................................................................7

2.2.3 Adding External Resistors ......................................................................................................................7

2.3 Transitioning from HID’s OEM50 or eProx Lock modules .................................................................. 7

2.3.1 OEM50 ...................................................................................................................................................8

2.3.2 eProx Lock Module .................................................................................................................................8

3 Software Integration Recommendations ............................................................................... 9

4 Mechanical Specifications .................................................................................................... 11

4.1 OEM75 Module – 3141Axx .............................................................................................................. 12

4.2 OEM75 Module – 3141ADx ............................................................................................................. 13

4.3 Antennas ......................................................................................................................................... 14

4.3.1 Antenna Model 3142 ............................................................................................................................ 15

4.3.2 Antenna Model 3144 ............................................................................................................................ 15

4.3.3 Antenna Model 3146 ............................................................................................................................ 16

4.3.4 Antenna Model 3148 ............................................................................................................................ 16

4.3.5 Antenna Model 3153 ............................................................................................................................ 17

4.4 Antenna Interfacing.......................................................................................................................... 17

5 Electrical Specifications ........................................................................................................ 18

5.1 Power Supply .................................................................................................................................. 18

5.2 Electrical Connections ..................................................................................................................... 18

5.3 I/O Specifications ............................................................................................................................. 20

5.4 P1 connector Ping Mode Static States ............................................................................................ 22

5.5 Electrical Application Hints .............................................................................................................. 22

6 Firmware ................................................................................................................................. 23

6.1 Applications ..................................................................................................................................... 23

6.2 Feature Bundles and Configuration ................................................................................................. 23

6.3 Updates ........................................................................................................................................... 23

6.4 Communication ................................................................................................................................ 23

6.5 SPI Implementation ......................................................................................................................... 23

6.6 General Recommendations ............................................................................................................. 24

6.7 SPI Message Transmission ............................................................................................................. 27

6.7.1 Host SPI Master Write Function ........................................................................................................... 27

6.7.2 Host SPI Master Read Function ........................................................................................................... 27

6.7.3 Peripheral Processor SPI Slave Interrupt Processing ........................................................................... 27

6.7.4 Sample Source Code ........................................................................................................................... 28

6.8 I²C Implementation .......................................................................................................................... 32

6.8.1 General Recommendations .................................................................................................................. 32

6.8.2 I²C Baud Rates and Clock Stretching ................................................................................................... 32

6.8.3 I²C Message Transmission ................................................................................................................... 32

Page 2 of 49 January 2014

6.8.4 Sample Source Code - I²C ................................................................................................................... 34

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

6.8.5 Wiegand ............................................................................................................................................... 43

6.8.6 Serial .................................................................................................................................................... 43

6.8.7 Timing .................................................................................................................................................. 44

7 OEM75 Module Configuration ............................................................................................... 45

7.1 Configuration Options ...................................................................................................................... 45

7.2 Configuration Card Availability ......................................................................................................... 45

7.3 Custom Configurations for High Volume Manufacturing Availability ................................................ 45

7.4 Reconfiguring the OEM75 in Normal Power Mode .......................................................................... 45

7.5 Reconfiguring the OEM75 in Ultra Low Power Mode....................................................................... 45

7.6 Regulatory ....................................................................................................................................... 47

8 Additional Tools ..................................................................................................................... 48

January 2014 Page 3 of 49

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

03/2011

First Release

A.0

Fax: 949 732 2120

Phoenix Road

Fax: 852 3160 4809

Copyright

Trademarks

HID GLOBAL, HID, the HID logo, iCLASS, OEM 75, and eProx are the trademarks or registered trademarks of HID Global Corporation, or its licensors, in the U.S. and other countries.

MIFARE is a registered trademarks of NXP B.V. and are used under license.

Disclaimer

This guide presents suggestions for proper usage and integration. Good Mechanical and Electrical Engineering practices are required to insure a quality final product.

Revision History

Date Description Version

01/14/2014 Update Module Dimensions B.0

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

Contacts

North America

15370 Barranca Parkway Irvine, CA 92618 USA

Phone: 800 237 7769

Europe, Middle East and Africa

Haverhill, Suffolk CB9 7AE England

Phone: +44 1440 714 850 Fax: +44 1440 714 840

Asia Pacific

19/F 625 King’s Road North Point, Island East Hong Kong

Phone: 852 3160 9800

support.hidglobal.com

Page 4 of 49 January 2014

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

HID

3141-901

OEM75 User Manual

1 Overview

1.1 Introduction

The OEM75® is designed to offer iCLASS® and MIFARE® technology to a wide variety of service providers using applications such as vending machines, biometric readers, card printers, time and attendance terminals, and alarm panels and more. The OEM75 is a third generation iCLASS module, offers ultra-low power consumption (configuration dependent), on-board voltage regulation, versatile ISO polling configuration, and various data outputs to enable a variety of hardware communication protocols. The UART, SPI, I2C and Wiegand communications allow for an OEM to have the power of iCLASS at their fingertips.

The OEM75 is designed to be a component in an upper level assembly and can operate with one of several antenna sizes. This Integration Guide provides recommendations which improve the integrator’s experience. This guide addresses Electrical, Mechanical, Software Interface and Antenna integration issues.

1.2 References

Source Part Number Description

HID 1356_MHz HTOG How to Order Guide (HTOG)

http://www.hidcorp.com > documents > 13.56 MHz How to Order Guide

Security Industry Association

HID 3141-905 OEM75 Interface Protocol

SIA AC-01 (1996.10) Wiegand Card Reader Interface Standard

1.3 Ordering

See the iCLASS OEM75 User Manual for ordering considerations. This document assumes that OEM75 hardware and the Development Kit are in the user’s possession.

January 2014 Page 5 of 49

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

Ultra Low Power

OEM75 Module

OEM75

Antenna

iCLASS

Card

/RESET

/HOLD

/GREEN_LED_

CARD_PRESENT

Host Hardware/Application

Wiegand Data 0 Wiegand Data 1

/BEEPER

/RED_LED

UART RX UART TX

I

2

C SCLK / SPI_ CLK

SPI_CS

SPI_MISO

I

2

C CSDA / SPI_MOSI

4

5

2 Getting Started

2.1 Theory of Operation

Configurable operation modes include:

• Autonomous – In this mode, the module polls for a card constantly and will not accept serial commands unless a card is in the field. Autonomous is the default operation of the OEM75.

• API – The module acts the same as in Autonomous operation except the module is always ready to receive a command from the host. When an RF or Serial command is received, the module will wait a configurable amount of time before it returns to polling for a card.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

Page 6 of 49 January 2014

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

Figure 2-1: OEM75 Operation

Power Modes Include:

• Ultra Low Power – The module is in Ultra Low Power mode as it polls for a card. When a card is detected in the RF field, the module wakes up, reads the card data, changes the Card Present line, outputs the card data, and goes back to sleep within a configured period of time to conserve power. Use this mode with battery power.

• Standard – The module is constantly powered on and polling for cards. The module is never asleep in this mode. Use this mode with an external power supply.

Power Autonomous Mode Remote Mode Autonomous Remote Mode



Standard Power

  



iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

2.2 Peripheral Circuits

The following section details recommended peripheral circuitry.

2.2.1 External Noise Filter

If false card detections occur in Ultra Low Power Mode, or the host has spectral noise, a line filter designed to block frequencies in the 10 KHz to 50 KHz range is beneficial when inlined with the power line.

2.2.2 Adding External LEDs or Beeper

Connect external LEDs to the OEM75 by connecting wires to the P2 connector The LEDs are connected to an external +3.3VDC supply with an external series current limit resistor. See Table 5-5: P2 I/O Electrical Specifications.

The Cathodes are connected through an external resistor to the RED or GREEN LED connector port signals. The OEM supplies current limiting resistors for modules.

The value of these resistors will depend on how much current is provided for the LEDs. The combined voltage drop of the resistor and output low voltage of the OEM75 on these signal lines should be factored in when selecting the LED brightness.

2.2.3 Adding External Resistors

For I2C Mode operation, external 10k pull-up resistors are required on the SCLK signals.

Note: There is already an internal pull-up resistor on the I2C SDA signal.

2.3 Transitioning from HID’s OEM50 or eProx Lock modules

Provided are suggestions for transitioning from the HID OEM50 and HID eProx Lock modules to the OEM75.

January 2014 Page 7 of 49

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

P2 Connector

Pin 1

Exc Supply

No signal on the OEM75

Pin 3

Serial Transmit

Same as OEM75 P1 pin 8 - UART Transmit

Pin 4

Serial Receive

Same as OEM75 P1 pin 7 - UART Receive

and 5VDC is a good supply voltage

P1 Connector

Pin 1

Open Output

OEM75 does not have a similar signal

Pin 2

Ground

Same as OEM75 P1 pin 2, signal Ground

OEM50 is inverted logic

2.3.1 OEM50

If transitioning from an OEM50 – here are the differences.

The OEM50 connector is a 2 X 6 0.1" space pin header or PWB hole pattern.

The OEM50 has a two-wire interface to the antenna and the OEM75 has a four-wire interface. Therefore, the OEM50 antenna will not work with the OEM75, and vice versa.

The harness and signal changes to adapt the signals from the OEM50 2 X 6 pattern to an OEM75 1 x 9 1.25mm pattern are the following.

Note: The additional P2 for HSI and SPI interfaces are 1 x 8 1.25mm pattern.

OEM50 OEM75

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

Pin 2

Exc Return is not used

Pin 5 Vdd Return Same as OEM75 P2 pin 2 - Battery Minus

Pin 6 Vdd +5VDC

Pin 3 Wiegand Data1

Pin 4 Wiegand Data0

2.3.2 eProx Lock Module

The eProx® Lock connector is mechanically the same as the OEM75’s connector P2. Be aware however, that the connections between the OEM75 module and the eProx Lock module are reversed. This implies that a straight-thru cable will not work. A 180 degree twist of the cable is required to insure that Pin 1 on one of the modules correctly mates with Pin 1 on the other module.

No signal on the OEM75

Same as OEM75 P2 pin 1 - Battery Positive

Wiegand data output is per the SIA AC-01 (1996.10) specification, except Voh is 3.3VDC max, and not 4.0 to 5.5 VDC

OEM50 is inverted logic

The two-wire 125 kHz antenna for the eProx Lock is not interchangeable with an OEM75 antenna.

Page 8 of 49 January 2014

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

3 Software Integration Recommendations

The following section details recommended software operational interfacing. The reader of this guide should use this information in conjunction with the OEM75 Interface Protocol Manual. Previously it has been shown how the OEM75 reader module interacts with the processor in the OEM75 Development Kit.

This discourse applies to a Host based application communicating/controlling/querying the OEM75 based reader firmware. The explanation of the operation is independent of type of hardware used to communicate with the OEM75. This information applies whether a UART, SPI or I2C serial connection is used. A user application must first update the data structure Application Protocol Data Unit APDB

Consider initially the transmission of a command to the OEM75 from a host. The state machine representation indicates the state of the task, the event that transitions the task is indicated above the dotted line and the action taken is indicated below the dotted line in the figure below.

When the host application has properly initialized an APDU, it raises the event _send(APDU). This event triggers a call to make_pkt(APDU) which encapsulates the control block into a serial packet and then calls _serial_send(_packet) which places the _packet on the serial output lines. The state machine then reverts back to a “Wait for call from above” state.

When the OEM75 recognizes the receipt of a packet by means of the event _recv(_packet), it makes a call to _extract(_packet, APDU) in order to extract the APDU from the packet and then call _deliver_data(APDU) which passes the APDU up to the higher layers for evaluation. The state machine returns to a state of “Wait for call from below”.

The above state machines represent the transmission of a command from the host to the reader at its most simplistic level. The operations also assume a perfect world in which no transmission line bit corruption occurs. In actuality the state machines must be a bit more complicated than initially

January 2014 Page 9 of 49

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

presented in order to recover from potential errors. It must be kept in mind that a similar set of state machines apply to the communication from the OEM75 to the host computer. The protocol operating in the OEM75 expects the delay between the stop bit of the preceding byte and the start bit of the next byte to be less than 500 milliseconds. This implies that a complete APDU is transmitted.

Let us now take into account the potential of sending the packet over an extended distance. Let us assume a maximum packet size of 263 bytes. For the most basic UART transmission at 57.6 Kbps with 2 stop bits and even parity. The recommended length of cable for proper operation is no longer than 50 feet and smaller lengths are specified for higher speed connections. The speed of an electrical signal is approximately 3 nsecs. per foot. A signal change on one end of the cable will be recognized approximately 3 nsecs/ft. *50 ft = 150 nsecs later on the other end of the cable. The bit time, that is the time to generate a bit is 1.0 / 57.6 Kbps = 17.36 microseconds per bit. Since this time is much greater than the transmission time of any change we can effectively ignore the transit time or the time it takes an electron to move from the source side to the destination side. The time it takes to transmit an entire byte including the start, stop and parity bits is then just 12 * 17.36 microseconds = 208 microseconds per byte. The time it takes to transmit a maximum length APDU is 208 * 263 = 54.79 milliseconds. The time to transmit back a 2 byte status is 416 microseconds, or

0.000416 milliseconds. If we assume no processing delays in the OEM75 the time from transmission to complete reception of an acknowledgement is then 55.206 milliseconds. The above analysis indicates that any timeout value used must be at least this large independent of the time it takes to process a command. The time it takes to execute each of the commands is command dependent.

This protocol cannot recover from multiple bit errors. A single bit error per byte can be detected, in which case either the host or the reader should ignore the entire message. A timeout should occur and the communication can be re-initiated. It is possible for an APDU to be corrupted when transmitting it to the OEM75 if the unit is connected to the host by means of a very long cable and that cable is routed near sources of electromagnetic interference. It is possible with the above conditions that bit corruption modifies the command field of an APDU resulting in an invalid execution. It is not recommended that the OEM75 be operated in this manner. In the scenarios depicted in section 2 of this document, the serial cable had a length of 6 feet.

Ultra-Low power applications must create a host interface which recognizes the CP (Card Present) signal generated by the constantly energized processor receiving antenna signals. This signal has a dual purpose, it is used not only to indicate a Card Present Event to the Host Processor but it also wakes up the OEM75 main processor. The host interface must keep in mind that the OEM75 main processor requires some time to power up and initialize before it can respond to either card or host requests. It is recommended that the CP signal be used as an interrupt signal to the Host processor. The Host processor should respond to this interrupt by setting a flag indicating that the CP event has been recognized and then return to the main processing task which should use the flag as an indication that Card Data needs to be read from the OEM75. The Host Application should delay a set period of time allowing the OEM75 main processor time to wake-up and initialize itself. After this time period the Host can request the card information.

Page 10 of 49 January 2014

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

4 Mechanical Specifications

The following section details all mechanical specifications for the OEM75 module, antennas and interfaces.

The connectors recommended are:

• P1 – An 8-position pin socket header.

 Molex Part Number: 53048-0810

 Tyco Part Number: 1734829-8

• P2 – A 9-position pin socket header

 Molex Part Number: 53048-0910

 Tyco Part Number: 1734829-9

• P3 – A 4 Pin right-angle zero-insertion-force connector.

 Molex Part Number: 39-53-2044

Note: On OEM 75 part number 3141AD models the form-factor of the circuit board is so small as to prohibit the use of Molex Part Number: 39-53-2044 on the board. You should investigate other methods of connecting to an antenna.

The following are the recommend cables that should be used with the OEM 75 modules.

The cable connecting P3 to the antenna connection is called JUDD wire. It is manufactured by both Judd Corporation and Sumitomo Corporation. This cable is somewhat brittle and the repeated bending of the cable should be avoided to minimize breakage. User implementations should strive to limit the length of this interconnection cable.

P1 is an 8-pin connector socket which accepts an 8-pin connector plug MOLEX Part Number: 51021-0800. The wire used is an AWG #28, 8 conductor flat cable

P2 is a 9-pin connector socket which accepts a 9-pin connector plug MOLEX Part Number: 51021-0900. The wire used is an AWG #28, 9 conductor flat cable

Antenna and module form factor specifications are discussed within this section.

January 2014 Page 11 of 49

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

Angular

±1º Bend

±1º

.XX

±.01 [.3]

Note: In the following mechanical drawings, unless otherwise specified the dimensions are in inches and [millimeters]. Tolerances are as follows:

Tolerances Definition

.XXX ±.005 [.13]

4.1 OEM75 Module – 3141Axx

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

Figure 4-1: OEM75 – 3141Axx

Note: The 20mil P1, P2 and P3 holes can accept 26 AWG (0.41 mm, 0.13 mm

mm, 0.08 mm

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HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

2

) wires.

2

) or 28 AWG (0.33

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

4.2 OEM75 Module – 3141ADx

Figure 4-2: OEM75 – 3141ADx

The OEM75 – 3141ADx was designed to be the smallest form factor possible. This module offering was designed to be header mounted on a host board utilizing the P1 and P2 connectors.

Note: The 20mil P1 and P2 holes can accept 26 AWG (0.41 mm, 0.13 mm

0.08 mm

2

) wires.

2

) or 28 AWG (0.33 mm,

January 2014 Page 13 of 49

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

3.0 in

[78 mm]

2.3 in

[60 mm]

Read Range

1.5 in

[40 mm]

4.0 in

[101 mm]

6.0 in

[160 mm]

Cable Length

S

t

a

n

d

a

r

d

P

o

w

e

r

Ultra Low Power Mode

2.7 in

[70 mm]

4.3 Antennas

Basic Antenna Operation

Credentials obtain their power from the magnetic field generated by the antenna of the reader. At the operating frequency of the reader this interaction is similar to the operation of an air core transformer. When an antenna is energized by an alternating current the induced magnetic field is directly proportional to the area enclosed by the antenna loop. The larger the loop, the more excitation current is required to produce the same level of magnetic flux. That flux covers a larger area and so the read range is extended. Other external factors can affect the magnitude of this induced magnetic field. Magnetic lines of flux when generated by a loop antenna are oriented perpendicular to the plane of the loop. This is known as the right-hand rule, the magnetic field wraps around the wire in the direction of current flow.

The antennas for the OEM75 are available in two different configurations.

• Non-tuned

Non-tuned antennas do not have tuning components loaded. OEM customers must stuff parallel and series capacitance in order to custom-tune non-tuned antennas to their specific environment. There are many factors involved with antenna tuning regarding proximity to metal and electronics. HID Global can provide assistance with tuning antennas for custom OEM environments. Contact your local HID Connect Technical Support for details.

• Air-tuned

Air-tuned antennas do have tuning components loaded. The antenna is pre-tuned for open air conditions (for example, not near metal). When an air-tuned antenna is placed near metal, its tuning is affected causing it to perform with a slightly smaller read range. More importantly, communication errors become more frequent when large data transfers are involved. All air-tuned antennas are pre-tuned for a 4.0 in (101 mm) cable length. For cable lengths of differing sizes, reference the following graph for read range impacts.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

Figure 4-3: Power Modes and Air-tuned Antenna (3142)

Match the signal and ground connections from the antenna to the OEM75 module with a ribbon cable (1.25mm spacing).

Due to power requirements, applications requiring PIV smart card support require a larger antenna. The environment where the antenna is placed and tuning also affect the performance. Consult Connect Technical Support for assistance in choosing an antenna for your environment.

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HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0

It should be recognized that mounting the loop antenna in close proximity to a metallic ground plane reduces the effective range of the card reader. If such a mounting is required it is recommended that the metallic ground plane have slots cut in it to reduce the generation of eddy loop currents.

• The following diagrams provide examples of Air-tuned Antenna’s.

4.3.1 Antenna Model 3142

Figure 4-4: 3142 A16 Antenna

4.3.2 Antenna Model 3144

Figure 4-5: 3144 A9 Antenna

January 2014 Page 15 of 49

HID GLOBAL CONFIDENTIAL AND/OR PROPRIETARY INFORMATION. This document contains confidential and/or proprietary information, which may not be duplicated, published, disseminated or disclosed, or used for any purpose, without the written consent of HID Global Corporation. If you are an unintended recipient of this information or are unwilling to accept the above restrictions, please immediately return this document to HID Global Corporation, 15370 Barranca Pkwy, Irvine, CA 92618-3106.