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AC4490 Hardware Integration Guide

Embedded Wireless Solutions Support Center:

http://ews-support.lairdtech.com
www.lairdtech.com/ramp

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© Copyright 2016 Laird. All Rights Reserved

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Figure 7: AC4490 1x1 PCB Considerations

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Summary of Contents for AC4490

Page 1: ...Americas 1 800 492 2320 Europe 44 1628 858 940 Hong Kong 852 2923 0610 wireless support lairdtech com www lairdtech com ramp AC4490 Hardware Integration Guide Version 4 6...

Page 2: ...owney 4 5 4 Aug 2014 Added Approved Antenna List Chris Downey 4 6 18 May 2017 Removed references to EOL part numbers Jonathan Kaye FCC Notice WARNING This device complies with Part 15 of the FCC Rules...

Page 3: ...est 12 RSSI 13 UP_Reset 13 CMD Data 14 AD In 14 In Range 14 Serial Interface 14 Serial Communications 14 Asynchronous Operation 14 Parity 14 Serial Interface Baud Rate 15 OEM Host Data Rate 16 Radio I...

Page 4: ...bers 24 Approved Antenna List 25 FCC IC Requirements for Modular Approval 25 OEM Equipment Labeling Requirements 26 Antenna Requirements 26 Warnings Required in OEM Manuals 26 Channel Warning 26 Appen...

Page 5: ...y client configured transceivers synchronized to it To establish synchronization between transceivers the server emits a beacon upon detecting a beacon an RF link is established and a GPIO is toggled...

Page 6: ...4490 1x1 3 Channel Sets AC4490 200 3 Channel Sets AC4490 1000 2 Channel Sets Security One byte System ID 56 bit DES encryption key Interface Buffer Size Input Output 256 bytes each TRANCEIVER Frequenc...

Page 7: ...C4490 1x1 1 00 x 1 00 x 0 162 CERTIFICATIONS AC4490 200 AC4490 1000 FCC Part 15 247 KQL 4x90200 KQLAC4490 Industry Canada IC 2268C 4x90200 2268C AC44901000 Caution ESD Sensitive Component You must use...

Page 8: ...e 3 Output Voltage Characteristics Signal Name Module Pin 1x1 Pin Type High Min Low Max Unit GO0 1 19 O 2 5 8 mA 0 4 8 mA V TXD 2 6 O 2 5 2 mA 0 4 2 mA V Hop Frame 6 1 O 2 5 2 mA 0 4 2 mA V CTS 7 9 O...

Page 9: ...dded Wireless Solutions Support Center http ews support lairdtech com www lairdtech com ramp 9 Copyright 2016 Laird All Rights Reserved Americas 1 800 492 2320 Europe 44 1628 858 940 Hong Kong 852 292...

Page 10: ...enabled in EEPROM the OEM Host can take this High when it is not ready to accept data from the transceiver Note Keeping RTS High for too long can cause data loss 9 19 O GO1 Generic Output pin 10 2 PWR...

Page 11: ...range of a server on same Channel and System ID Always low on a server radio N A 14 RF RF Port RF Interface N A 22 I Reset Active Low version of UP_RESET If RESET is used UP_RESET should be left floa...

Page 12: ...he operation of CTS CTS On specifies the amount of bytes that must be in the buffer for CTS to be disabled logic High Even while CTS is disabled the OEM host can send data to the transceiver but it sh...

Page 13: ...rage area 2 Measure the RSSI to obtain the minimum value with no other signal present 3 Power up another transceiver and begin sending data from that transceiver to the transceiver being measured Make...

Page 14: ...ata rate Refer to the following sections to ensure that the OEM host data rate matches the serial interface baud rate Serial Communications The AC4490 is a TTL device which may connect to a compatible...

Page 15: ...corresponds to 1 Space S corresponds to 0 Serial Interface Baud Rate This two byte value determines the baud rate used for communicating over the serial interface between the OEM Host and the transcei...

Page 16: ...Status Receive Acknowledgement Note Implemented in firmware v6 3 and later When enabled in EEPROM GO0 and GO1 perform the functions of Protocol Status and Receive Acknowledgement Protocol Status Every...

Page 17: ...e OEM asserts its CTS transceivers RTS high the transceiver will wait to send data over the serial bus to the OEM host until the RTS is asserted low CTS should be monitored by the OEM host since this...

Page 18: ...to be a much wider band than the information they are carrying and they use special pseudo noise codes to make them more noise like It is this characteristic that makes SS signals difficult to detect...

Page 19: ...logy channel number and system ID are not enough to secure your data the AC4490 supports the Data Encryption Standard DES which is the third level of security Encryption is the process of encoding an...

Page 20: ...eserved Americas 1 800 492 2320 Europe 44 1628 858 940 Hong Kong 852 2923 0610 AC4490 MECHANICAL AND LAYOUT Mechanical Drawings Interface Connector 20 pin OEM Interface connector Molex 87759 0030 mate...

Page 21: ...dded Wireless Solutions Support Center http ews support lairdtech com www lairdtech com ramp 21 Copyright 2016 Laird All Rights Reserved Americas 1 800 492 2320 Europe 44 1628 858 940 Hong Kong 852 29...

Page 22: ...Wireless Solutions Support Center http ews support lairdtech com www lairdtech com ramp 22 Copyright 2016 Laird All Rights Reserved Americas 1 800 492 2320 Europe 44 1628 858 940 Hong Kong 852 2923 0...

Page 23: ...com ramp 23 Copyright 2016 Laird All Rights Reserved Americas 1 800 492 2320 Europe 44 1628 858 940 Hong Kong 852 2923 0610 AC4490 TIMING DIAGRAMS Figure 8 Addressed Mode with Timeout Figure 9 Addres...

Page 24: ...downloadable configuration testing software and integration engineering support COMPLIANCE INFORMATION AC4490 1x1 Due to the RF antenna trace residing on the OEM Host PCB the FCC will not grant modul...

Page 25: ...Y2283 1 Comtelco Yagi 6dBd X X X Y2283A0915 10RP Comtelco Yagi 6dBd X X X SG101N915 1 Nearson Omni 5 X X X SG101NT 915 Nearson Omni 5 X X X GM113 V Torch Omni 3 5 X X PC8910NRTN Cushcraft Yagi 11dBd...

Page 26: ...he type size for the text is not required to be larger than eight point 8 pt Antenna Requirements WARNING This device has been tested with an MMCX connector with the above listed antennas When integra...

Page 27: ...0 and 1x1 leave this to the OEM Some of the most common voltage conversion methods are described below Voltage Level Conversion IC s This is the easiest and most efficient method Laird recommends the...

Page 28: ...ors to the bottom side ground plane If the input voltage is less than 12 volts C1 and C2 can be replaced with a single 100 F 20 volt capacitor same part number as C7 This will reduce board space and c...

Page 29: ...ss Solutions Support Center http ews support lairdtech com www lairdtech com ramp 29 Copyright 2016 Laird All Rights Reserved Americas 1 800 492 2320 Europe 44 1628 858 940 Hong Kong 852 2923 0610 PCB...

Page 30: ...t Number AC4490 1x1 AC4490 200 AC4490 1000 Size 1 0 x 1 0 x 0 125 1 9 x 1 65 x 0 20 1 9 x 1 65 x 0 20 Range Up to 1 mile Up to 4 miles Up to 20 miles Throughput 32 Kbps 32 Kbps 32 Kbps Current Draw RX...

Page 31: ...RELATED DOCUMENTS AND FILES The following additional AC4490 technical documents are also available from the RAMP page under the Product Information tab in the row labelled AC4490 900MHz Radio Module...

Page 32: ...serves the right to make periodic modifications of this product without obligation to notify any person or entity of such revision Copying duplicating selling or otherwise distributing any part of thi...

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