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Section A.2 - Application Notes.Design Examples

Version 1.3 - 2009-12

41

A.2.2.4 External RS422/RS485 transceiver

Note: This function is currently not supported

A complete RS422/RS485 transceiver design connected to a bus system need to control the en-
able signals of the transceiver. The SerialSelect signals are used for this purpose (see Table 12).

The module need to be software configured to the corrected interface, see the Serial Port Adap-
ter AT Commands document how to configure the module to the correct serial interface.

The Red/Mode pin is not allowed to be pull-down when using the SerialSelect signals (see sec-
tion 2.3).

Table 12: SerialSelect signals combinations

Serial
Select-0

Serial
Select-1

RS485/RS422 Transmitter
status (Active high)

RS485/RS422 Receiver
status (Active low)

0 0 Disabled

Enabled

0 1 Enabled

Enabled

1 0 Enabled

Disabled

1 1 Disabled

Disabled

Figure 16: A complete RS422/RS488 transceiver design.

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Summary of Contents for cB-0922

Page 1: ...Electrical Mechanical Datasheet cB OZS311 cB 0922 IEEE 802 15 4 OEM Module ...

Page 2: ...nces for direct indirect unexpected damage or consequent damage that is caused by this document All rights reserved Release 2009 12 Document version 1 3 Document number cBProduct 0805 07 Printed in Sweden Trademarks Registered trademarks from other companies are Bluetooth is a trademark owned by the Bluetooth SIG Inc Microsoft Windows Windows NT Windows 2000 Windows CE Windows ME are registered tr...

Page 3: ...as 17 5 Mounting Information 22 5 1 Board Outlines 22 5 2 Using the J2 J3 Board to Board Connectors 24 5 3 Using Press Fit Nuts for Mounting the Module 28 5 4 Using the J6 PCB solder pads 28 5 5 Antenna Issues 29 6 Regulatory Information 30 6 1 Declaration of Conformity 30 6 2 Safety Compliance 31 6 3 FCC and IC Compliance 31 6 4 UL listing information 33 6 5 Compliance with RoHS directive 33 7 Gu...

Page 4: ...les customers to prepare their device for both IEEE 802 15 4 Bluetooth and or Wireless LAN 1 2 KEY FEATURES No software driver needed Radio type approved for Europe Unlicensed Modular Transmitter Approval for US FCC and Canada IC Compliant with EMC standards Industrial temperature range 40 to 85 C Support for low power modes Compatible with connectBlue Bluetooth and Wireless LAN modules Supports s...

Page 5: ...s Product Name OEM Module ID Regulatory ID FCC ID IC ID Description cB OZS311i 04 cB 0168 cB 0922 02 PVH092202 5325A 092202 IEEE 802 15 4 OEM Serial Port Adapter 311 with internal antenna board to board and solder pads cB OZS311i 06 cB 0169 cB 0922 02 PVH092202 5325A 092202 IEEE 802 15 4 OEM Serial Port Adapter 311 with internal antenna JST 6 pol connector board to board and solder pads cB OZS311x...

Page 6: ...Section 1 5 Introduction Block Diagram cB OZS311 Version 1 3 2009 12 6 1 5 BLOCK DIAGRAM CB OZS311 Figure 1 Block diagram of cB OZS311 ...

Page 7: ... board one piece part connectors J2 through J3 The J2 to J3 connectors on the OEM Serial Port Adapter exist on the module only as a mating PCB layout pattern see Picture 3 See Section 5 2 for more information Via the optional JST connector J8 see Picture 4 The connector is a 6 poles wire connector The pitch is 1mm The connector is from JST with part number SM06B SRSS TB The cB OZS311x models have ...

Page 8: ...in Numbering Version 1 3 2009 12 8 2 2 PIN NUMBERING 2 2 1 J2 J3 and J6 Connectors Figure 2 Bottom view of the PCB with the pinning of the J2 J3 and the J6 connector 2 2 2 JST 6 pol J8 Figure 3 Top view of the PCB with the pinning of the J8 connector ...

Page 9: ...Chapter 3 Table 8 Active low Mode Not used on cB OZS311 This pin is also used to select Logic level mode instead of RS232 for connectBlue products with internal RS232 driver To be compatible with these products check the datasheet for these products about this signal 12 29 Switch 0 Function switch CMOS In Used for the Connect on external signal function see the Serial Port Adapter AT command Speci...

Page 10: ...ecification for more information on the Restore switch See section A 2 3 2 for design examples 14 8 BLUE Blue LED output CMOS Out Logic Blue LED Signal see Chapter 3 Table 8 Active low Note Signal will flicker at data transmission See section A 2 3 1 for design examples 15 11 5 UART CTS Clear To Send CMOS In Hardware flow control Active low 16 9 3 UART TxD Transmit Data CMOS Out 0 Low 1 High 17 12...

Page 11: ... Version 1 3 2009 12 11 Pin Nr J2 J3 J6 J8 Pin Name Signal Name Signal Level Type Description 19 1 RESET Hardware reset CMOS In Out Active low Must be open drain collector See section 2 5 for design examples All signals are logic level UART signals typically 0 3VDC ...

Page 12: ... 4 2 4 1 Power supply NOTE Read the safety notes in chapter 7 before using the modules Table 3 Power supply Symbol Parameter Value Unit Min 3 3 VDC VCC_3V3 Power supply Unregulated Max 6 0 VDC The module is equipped with an internal linear voltage regulator Table 4 Current consumption Symbol Mode Value Unit Not connected Idle Average 27 mA Idle or Receiving Average 27 mA ICC VCC_3V3 3 3V Connected...

Page 13: ...evel input voltage RESET signal Max 3 5 V VOUT Low Logic LOW level output voltage Max 0 6 V VOUT High Logic HIGH level output voltage Min 2 3 V IGPIO Sink and source current Max 4 mA Min 20 kΩ RPU I O Pull up resistor Max 50 kΩ Min 9 kΩ RRST Reset Pull up resistor Max 13 kΩ 2 4 3 RF specification Table 6 RF information Symbol Parameter Value Unit Min 11 Channels Max 26 Min 2405 MHz f Frequency ran...

Page 14: ...istics Version 1 3 2009 12 14 2 4 4 Environmental Table 7 Temperatures characteristics Parameter Product Variant Value Unit Min All 40 C Storage temperature Max All 125 C cB OZS311i x 04 40 C Min cB OZS311i x 06 25 C Maximum operating temperature Max All 85 C ...

Page 15: ...6 connectors see section 2 2 An external reset source must be open drain collector see section 0 for design examples The RESET pin is internally pulled up with 10kΩ 2 6 POWER CONTROL Note This function is currently not supported For more information about Stop Mode and other low power modes see the IEEE 802 15 4 Serial Port Adapter AT command Specification ...

Page 16: ...ve LOW Table 8 Signal states in different module modes Serial Port Adapter Mode Status RGB LED Color GREEN GPIO BLUE GPIO RED GPIO Data mode IDLE Green LOW HIGH HIGH AT mode IDLE Orange LOW HIGH LOW Data mode AT mode CONNECTING Purple HIGH LOW LOW Data mode AT mode CONNECTED Blue HIGH LOW HIGH On data activity the active LEDs flashes and will be HIGH for 50 100ms For information on how to suppress...

Page 17: ... to the board through a U FL connector Some of the antennas are connected directly to the U FL connector of the board and some are connected using an SMA connector through a short U FL to SMA adapter cable Reverse Polarity SMA antenna versions are also available for usage in US and Canada Other antennas are also available on request please contact connectBlue for more information 4 2 1 Antenna Acc...

Page 18: ...8 Part Number cB ACC 38 Name U FL to Reverse Polarity SMA adap ter cable Connector U FL and reverse polarity SMA male Cable length 120 mm Cable loss Less than 0 5dB Comment The SMA connector may be mounted in a panel Approved for use in the US Canada and Europe ...

Page 19: ...ale Comment To be mounted on the U FL to SMA adapter cable Approval Approved for Europe Not approved for use in the US and Canada Part Number cB ACC 36 Name WCR 2400 SMRP Manufacture Centurion Type wave dipole Polarization Vertical Gain 2 5dBi Size 100 mm Straight Connector Reverse Polarity SMA female Comment To be mounted on the U FL to reverse polarity SMA adapter cable Approval Approved for use...

Page 20: ...d on the U FL connector on the PCB Approval Approved for use in the US Canada and Europe Part Number cB ACC 23 Name Mobile Mark Stub Manufacture Mobile Mark Communications Antennas Type wave dipole Polarization Vertical Gain 0dBi Connector SMA male Comment To be mounted on the U FL to SMA adapter cable Approval Approved for Europe Not approved for use in the US and Canada Please contact connectBlu...

Page 21: ...e on request Approval Approved for Europe Not approved for use in the US and Canada Please contact connectBlue for information about US and Canada approved versions of the antenna Part Number cB ACC 21 Name Rugged SMA Manufacture Radiall Larsen Type wave dipole Polarization Vertical Gain 2dBi Connector SMA male Comment To be mounted on the U FL to SMA adapter cable Approval Approved for Europe Not...

Page 22: ...Section 5 1 Mounting Information Board Outlines Version 1 3 2009 12 22 5 Mounting Information 5 1 BOARD OUTLINES Figure 4 cB OZS311 dimensions mm ...

Page 23: ...d double row connectors see section 5 2 1 are not aligned The outer tangents of the 2 3mm holes align the module if the single row connectors are used and the inner if double row connectors are used see Figure 5 Choose the outer tangent CC distance 27 24mm if the module is aligned and mounted with some other technique based on M2 screws e g press fit nuts see Figure 6 and Figure 7 Figure 5 The 2 3...

Page 24: ... the motherboard Another way to mount the module is to use press fit nuts on the motherboard and skip the M2 threads on the connector see section 5 3 for more information about press fit nuts Table 9 Single row connectors from Samtec Samtec order number Quote number Equivalent part Package Remark ASP 118645 01 55392 SEI 120 02 GF S AB Tube Align pin on bottom side only ASP 118645 02 55392 SEI 120 ...

Page 25: ...Section 5 2 Mounting Information Using the J2 J3 Board to Board Connectors Version 1 3 2009 12 25 Figure 6 Host PCB layout mm for single row connector ...

Page 26: ...erboard and skip the M2 threads on the connector see section 5 3 for more information about press fit nuts Table 10 Double row connectors from Samtec Samtec order number Quote number Equivalent part Package Remark REF 120021 01 55392 FSI 120 03 G D AB Tube Align pin on bottom side only REF 120021 02 55392 FSI 120 03 G D AB K TR Tape n Reel Align pin on bottom side only REF 120018 01 55392 FSI 120 ...

Page 27: ...Section 5 2 Mounting Information Using the J2 J3 Board to Board Connectors Version 1 3 2009 12 27 Figure 7 Host PCB layout mm for double row connector ...

Page 28: ... We strongly recommend the modules not being soldered more than 1 time after shipping from connectBlue and that the modules are mounted just before the host product is being soldered the last time Although connectBlue devices will withstand up to two reflows to an absolute maximum temperature of 250 C The PCB in our modules is made of FR4 type with Chemical Gold Pads The modules are produced in a ...

Page 29: ...nted in a metal enclosure No metal casing or plastics using metal flakes should be used avoid also metallic based paint or lacquer Keep a minimum clearance of 5 mm between the antenna and the casing Keep minimum 10 mm free space from metal around the antenna including under and above If a metal enclosure is required one of the external antenna options has to be used See section 4 2 for more inform...

Page 30: ...of frequency spectrum EN 300 328 V1 7 1 2006 05 EMC EN 301 489 1 V1 8 1 2008 04 EN 301 489 17 V1 3 2 2008 04 EN 61000 6 2 2005 Health and safety EN 50371 2002 EN 60950 1 2006 and or IEC 60950 1 2005 2nd Edition Medical Electrical Equipment IEC 60601 1 2 2001 2009 12 08 Malmö Sweden Mats Andersson CTO of connectBlue AB If a cB OZS311 is used within EU a notification must be made to each of the nati...

Page 31: ...user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help 6 3 1 2 Caution Any changes or m...

Page 32: ...t to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation When the device is so small or for such use that it is not practicable to place the statement above on it the information shall be placed in a prominent location in the instruction manual or pamphlet sup...

Page 33: ...922 02 this information is useful The printed circuit board if produced according to the following specification UL recognized ZPMV2 min 105 C flame class V 0 or better 6 5 COMPLIANCE WITH ROHS DIRECTIVE All products based on the PCB cB 0922 are produced according to the RoHS Restriction of the use of certain Hazardous substances in electrical and electronic equipment directive and complies with t...

Page 34: ...only be performed by connectBlue AB Do not paint your product as the paint could prevent normal use If you will not be using your product for a while store it in a place that is dry free from damp dust and extreme heat and cold The clearance and creepage distances required by the end product must be withheld when the module is installed The cooling of the end product shall not negatively be influe...

Page 35: ...electronic device could generate sparks Sparks in such areas could cause an explosion or fire resulting in bodily injury or even death Areas with a potentially explosive atmosphere are often but not always clearly marked They include fuelling areas such as petrol station below deck on boats fuel or chemical transfer or storage facilities and areas where the air contains chemicals or particles such...

Page 36: ...ical design Go on to next point Do you want to use RS232 as the physical serial interface See section A 2 2 2 for electrical design Go on to next point Do you want to use RS485 or RS422 as the physical serial interface See section A 2 2 4 A 2 2 4 for electrical design Go on to next point Are you using a 5V host system See section A 2 1 Figure 10 for electrical design See section A 2 1 Figure 9 for...

Page 37: ...A 5V host system can easily be adjusted to the logic levels A host system output signal can use a resistive divider 1 8kΩ 2 2kΩ to adjust the levels This is applicable for speeds up to 115 2kBits s The divider can be improved by adding a logic buffer 74HCT08 for higher speeds see Figure 10 The host system input pins could require a buffer see Figure 10 depending on the logic level requirements see...

Page 38: ...rial Port Adapter AT commands specification DTR Data Terminal Ready can be used to detect if the module is up and running and ready to receive data Note The module must be configured to flow control none if hardware flow control is not used see the Serial Port Adapter AT Commands specification A 2 2 1 Logic level Mode The serial UART interface can be used in a host controller application with a UA...

Page 39: ...river An external RS232 driver is needed if the module should have a RS232 serial interface See Figure 14 for a complete design example that could be connected to the serial port of standard PC Not used functionality can be left unconnected see section A 2 2 Figure 14 A complete RS232 interface ...

Page 40: ...lication Notes Design Examples Version 1 3 2009 12 40 A 2 2 3 External RS422 driver An external RS422 driver could be used in a point to point full duplex application see Figure 15 Figure 15 A complete RS422 interface ...

Page 41: ...d to be software configured to the corrected interface see the Serial Port Adap ter AT Commands document how to configure the module to the correct serial interface The Red Mode pin is not allowed to be pull down when using the SerialSelect signals see sec tion 2 3 Table 12 SerialSelect signals combinations Serial Select 0 Serial Select 1 RS485 RS422 Transmitter status Active high RS485 RS422 Rece...

Page 42: ...the module is connected or not The BLUE signal flashes when the module is sending and receiving data see Chapter 3 Table 8 See Figure 18 for an example on how to suppress the flashes Figure 17 A blue LED can be connected directly to the module if the LED current is below 4mA A high state active low makes the voltage drop over the LED to 2 2V This is not enough to light the LED Figure 18 A Low pass...

Page 43: ...ngle gate package 74AHCT1G08 Figure 19 A red LED in a 3 3V host system The status of the signal can also be used as input to a host controller Figure 20 A red LED in a 5V host system The status of the signal can also be used as input to a host controller The RED signal pin is also used to select Logic Level mode instead of RS232 for connectBlue product with internal RS232 driver e g cB OEMSPA312 T...

Page 44: ...the LED A 74HC08 logic gate can be used in a 3 3 3V system see Figure 21 and a 74HCT08 logic gate in a 5V system see Figure 22 Both gates are available in a single gate package 74AHC1G08 74AHCT1G08 Sometimes over time switch contacts can get an oxide layer This may cause the closed switch resistance to become too high to sink the signal to logic LOW the signal is internally pulled up to 20kΩ A des...

Page 45: ...gic LOW the signal is internally pulled up to 20kΩ A design that prevents this can be found in Figure 26 The GREEN Switch 1 pin can be left unconnected if none of its functionality is required Figure 25 A low resistance restore switch used Notice the 4 7kΩ Ω Ω Ω serial resistor Figure 26 If the resistance in the switch is not guaranteed to be low enough a safer design can be used Notice the 4 7kΩ ...

Page 46: ... used A 2 4 Reset TheRESET pin can be connected to an external reset source see Figure 29 for a switch example If the reset signal is connected to an output signal it must be an open drain collector see Figure 30 Notice the capacitive load on the RESET pin in section 2 4 The RESET pin can be left unconnected if not used Figure 29 A reset switch Figure 30 Design of an open collector reset from an a...

Page 47: ...ystem Interface This is a complete 5V host system interface example with an RGB LED and two switches except the serial interface see section A 2 2 for information The design is based on the LM339 Quad OP amp instead of logic gates Figure 31 A complete 5V host interface with operational amplifier ...

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