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16 

 

Communication Interfaces 

The EM20 can communicate with the host device via its TTL-232 interface. This interface is applicable to 

most  system  architectures.  For  those  requiring  RS-232,  a  TTL-232  to  RS-232  conversion  circuit  is 

needed. 

The  EM20

’s  TTL-232  interface  supports  baud  rates  from  1200bps  to  115200bps;  it  does  not  support 

hardware flow control. Its default settings are 9600bps, 8 data bits, no parity check and1 stop bit. 

Besides, the EM20 can also communicate with the host device via its USB interface (optional). 

1. USB HID-KBW: Based on USB connection, the engine

’s transmission is simulated as USB keyboard 

input. It works on a Plug and Play basis and no driver is required. 

2. USB COM Port Emulation: The USB interface on the host device is emulated as a serial port with the 

same data transmission and configuration as a real serial port. A driver is required. 

3.  USB  HID-POS:  It  is  based  on  HID  with  no  need  for  custom  driver  and  is  way  more  efficient  in 

communication than keyboard emulation and traditional RS-232 interface. 

 

Содержание NLS-EM20

Страница 1: ...NLS EM20 OEM Scan Engine Integration Guide ...

Страница 2: ...ty function or design at any time without notice The information contained herein is subject to change without prior notice The products depicted in this manual may include software copyrighted by Fujian Newland Auto ID Tech Co Ltd or third party The user corporation or individual shall not duplicate in whole or in part distribute modify decompile disassemble decode reverse engineer rent transfer ...

Страница 3: ... Version Description Date V1 0 0 Initial release July 24 2015 V1 0 1 1 Deleted the Ambient Environment section in Chapter 2 2 Modified the Operating Voltage and Operating Current sections in Chapter 3 November 20 2016 ...

Страница 4: ...ons 2 Installation Orientation 3 Optics 4 Window Placement 4 Window Material and Color 4 Scratch Resistance and Coating 4 Window Size 5 Ambient Light 6 Eye Safety 6 Mounting 7 Front View unit mm 7 Side View unit mm 7 Top View unit mm 8 Chapter 3 Electrical Specifications 9 Power Supply 9 Ripple Noise 9 DC Characteristics 10 Operating Voltage 10 Operating Current 10 ...

Страница 5: ...Interface Connectors 14 12 Pin FPC Connector 14 Micro USB Connector 15 Communication Interfaces 16 External Circuits 17 Good Read LED Circuit 17 Beeper Circuit 17 Sleep Mode LED Circuit 18 Wake Up Circuit 19 Trigger Circuit 19 Chapter 5 Development Tools 20 EVK 20 QuickSet uExpress 20 ...

Страница 6: ......

Страница 7: ...y simplifies application design and delivers superior performance and solid reliability with low power consumption The EM20 supports all mainstream 1D as well as PDF417 QR Code QR1 QR2 Micro QR Data Matrix and GS1 DataBarTM RSS Limited Stacked Expanded versions Illumination The EM20 has four white LEDs for supplementary lighting The illumination can be programmed On or Off Aimer The EM20 does not ...

Страница 8: ...oard Dust and other external contaminants will eventually degrade the engine s performance Thermal Considerations Electronic components in the EM20 will generate heat during the course of their operation Operating the EM20 in continuous mode for an extended period may cause temperatures to rise on CIS and decoder chip Overheating can degrade image quality and affect scanning performance Given that...

Страница 9: ...ion There is a threaded mounting hole at each of the EM20 s four corners for fastening the engine to a mounting surface with machine screws The following figure illustrates a front view of the EM20 after correct installation ...

Страница 10: ...lections back into the lens Window Material and Color CIS s responsiveness mainly to wavelengths of white light should be taken into consideration when choosing window material and color in order to achieve the possible highest spectral transmission lowest haze level and homogeneous refractive index It is suggested to use PMMA or optical glass with spectral transmittance of white light over 90 and...

Страница 11: ...5 Window Size The window must not block the field of view Horizontal Vertical FOV Envelope FOV Envelope ...

Страница 12: ...ower However high frequency pulsed light can result in performance degradation Eye Safety The EM20 has no lasers It uses white LEDs to create illumination beam The LEDs are bright but testing has been done to demonstrate that the engine is safe for its intended application under normal usage conditions However the user should avoid looking into the beam ...

Страница 13: ...7 Mounting The illustrations below show the mechanical mounting dimensions for the EM20 The structural design should leave some space between components Front View unit mm Side View unit mm ...

Страница 14: ...8 Top View unit mm ...

Страница 15: ...e engine Unstable power supply or sharp voltage drops or unreasonably short interval between power ons may lead to unstable performance of the engine Do not resupply the power immediately after cutting it off The minimum interval must exceed 2 seconds Ripple Noise Image sensor and decoder chip are directly fed by the input power of EM20 To ensure the image quality a power supply with low ripple no...

Страница 16: ...VDD Voltage Drain Drain 3 3 5 0 5 5 V VIH High Level Input Voltage VDD 0 5 V VIL Low Level Input Voltage 0 5 V VOH High Level Output Voltage VDD 0 3 V VOL Low Level Output Voltage 0 3 V Operating Current Ta 23 VDD 5V Operating Current Standby Current Sleep Current 198mA typical 236mA max 16mA 10mA ...

Страница 17: ...L 232 interface or USB interface The Micro USB connector can only be used as standard USB interface Fig 4 1 illustrates the positions of the 12 pin FPC connector and Micro USB connector on the EM20 s decoder board as well as the pin layout of FPC connector See the following TTL 232 and USB sections to learn about the pinouts of the 12 pin FPC connector Fig 4 1 ...

Страница 18: ... TXD O Output TTL level 232 transmit data 6 nCTS I Input TTL level 232 clear to send 7 nRTS O Output TTL level 232 request to send 8 PWRDWN O Output Active high scan engine is in sleep mode 9 nBEEPER O od Output Open Drain Beeper output 10 nGoodRead O od Output Open Drain Good read LED output 11 nWAKE I Input Active low wakes the engine from sleep mode 12 nTrig I Input Active low signal used as tr...

Страница 19: ...nput Output USB D signal 7 Reserved O Reserved 8 PWRDWN O Output Active high scan engine is in sleep mode 9 nBEEPER O od Output Open Drain Beeper output 10 nGoodRead O od Output Open Drain Good read LED output 11 nWAKE I Input Active low wakes the engine from sleep mode 12 nTrig I Input Active low signal used as trigger input to activate the engine to start a scan and decode session I Input O Outp...

Страница 20: ... Host Interface Connectors The EM20 is equipped with a 12 pin FPC connector and a Micro USB connector 12 Pin FPC Connector The EM20 uses an FFC FPC connector CF20121V0R0 LF manufactured by CviLux Fig 4 2 ...

Страница 21: ...15 Micro USB Connector The EM20 s Micro USB connector is a standard connector and can be used accordingly Fig 4 3 ...

Страница 22: ...k and1 stop bit Besides the EM20 can also communicate with the host device via its USB interface optional 1 USB HID KBW Based on USB connection the engine s transmission is simulated as USB keyboard input It works on a Plug and Play basis and no driver is required 2 USB COM Port Emulation The USB interface on the host device is emulated as a serial port with the same data transmission and configur...

Страница 23: ... application The nGoodRead signal is from Pin 10 of the 12 pin FPC connector Fig 4 4 Beeper Circuit The circuit below is used to drive an external beeper The left part shows internal beeper driver circuit on the decoder board and the right part shows external circuit that users may utilize in actual application The nBEEPER signal is from Pin 9 of the 12 pin FPC connector Fig 4 5 Internal LED Drive...

Страница 24: ...er circuit on the decoder board and the right part shows external circuit that users may utilize in actual application The PWRDWN signal is from Pin 8 of the 12 pin FPC connector Users can adjust the external circuit and its function as per actual needs on condition that the external circuit matches the internal circuit Fig 4 6 Internal LED Driver Circuit External Circuit ...

Страница 25: ...08 60R L2 C6 100pF nWAKE Fig 4 7 Trigger Circuit The circuit below is used to provide the engine with an active low signal to activate a scan and decode session The right part shows internal driver circuit on the decoder board and the left part shows external circuit that users may utilize in actual application The nTrig signal is from Pin 12 of the 12 pin FPC connector Users can adjust the extern...

Страница 26: ...eeper beeper driver circuit LED LED driver circuit trigger reset buttons TTL 232 to RS 232 converter TTL 232 to USB converter RS 232 USB interfaces etc The EM20 can be connected to the EVK via a 12 pin FFC cable type 1 contacts on the same side Either USB connection or RS 232 connection can be used when connecting the EVK to a host device QuickSet uExpress A bunch of software such as QuickSet and ...

Страница 27: ...ds TEL 31 0 345 87 00 33 FAX 31 0 345 87 00 39 Email info newland id com WEB www newland id com Tech Support tech support newland id com Newland North America Inc Address 46559 Fremont Blvd Fremont CA 94538 USA TEL 510 490 3888 Fax 510 490 3887 Email info newlandna com WEB www newlandna com Newland Taiwan Inc 7F 6 No 268 Liancheng Rd Jhonghe Dist 235 New Taipei City Taiwan TEL 886 2 7731 5388 FAX ...

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