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21

Timing Sequence

Power Up and Power Down Timing Sequence

EXT_VCC

USB_D+

USB_D-
RS232_TX

RS232_RX

EXT_TRIG#

EXT_DSF

1.0s

1.3s

Figure 4-6

1. In the diagram above, it takes about 1s to initialize the engine. Operate the engine via the host 1.3s later after the

engine is powered on.

2. Before powering off the engine, ensure that data transmission via its communication interface(s) is complete to prevent

transmission errors.

3. Before the EXT_VCC is powered on, ensure that other signals remain low to prevent current from flowing backwards

to affect the performance of the engine.

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Содержание EM27

Страница 1: ...SCANNING MADE SIMPLE EM27 OEM Scan Engine integration guide...

Страница 2: ...nction 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 N...

Страница 3: ...Revision History Version Description Date V1 0 0 Initial release April 6 2021 V1 0 1 Updated the 8 pin Box Connector section in Chapter 3 May 12 2021...

Страница 4: ......

Страница 5: ...n 5 Introduction 5 General Requirements 5 ESD 5 Dust and Dirt 5 Ambient Environment 5 Thermal Considerations 6 Optical Elements 6 Mounting 7 Housing Design 7 Optics 8 Window Placement 8 Window Materia...

Страница 6: ...DC Characteristics 17 Operating Voltage 17 Ripple Noise 18 I O Voltage 18 Operating Current 19 Timing Sequence 21 Power Up and Power Down Timing Sequence 21 Chapter 5 External Reference Circuit 23 Ext...

Страница 7: ...o mechanical engineer should conduct an opto mechanical analysis before integration Chapter Description Chapter 1 Getting Started Gives a general description of the EM27 Chapter 2 Installation Describ...

Страница 8: ...2 Related Documents 8 pin box connector specification Xiamen PinToPin Electronic Technology Co Ltd Model 1 0T 8AWB http www ptpxm com...

Страница 9: ...Compliance Statement The EM27 complies with IEC 62471 2006 for LED safety The EM27 contains a CMOS image sensor and its lens four LEDs a buzzer a 8 pin box connector Figure 1 1 System Block Diagram Th...

Страница 10: ...27 provides a buzzer to indicate power on and good read statuses The Power On Beep and Good Read Beep can be programmed On or Off and the Good Read Beep Volume Duration and Frequency are also programm...

Страница 11: ...ce It is advised to take corresponding protection measures when integrating the engine The engine is shipped in ESD safe packaging Always exercise care when handling the engine outside its package Be...

Страница 12: ...ating the EM27 Avoid continuous use of LEDs for prolonged periods Reserve sufficient space for good air circulation in the design Avoid wrapping the EM27 with thermal insulation materials such as rubb...

Страница 13: ...imaging performance Housing design should make sure that internal reflections from the aiming and illumination system are not directed back to the engine The reflections from the housing or window can...

Страница 14: ...ed glass are recommended Window material selected for the engine should meet or exceed the specifications specified in Table 2 2 When using a clear plastic window it is recommended to apply anti refle...

Страница 15: ...applied to window surfaces to reduce reflected light from the window back into the engine Multi layer AR coatings on windows help to achieve less than 0 5 reflectance and covered wavelength is 400 780...

Страница 16: ...10 Window Size The window must not block the field of view and should be sized to accommodate the FOV envelopes shown below Horizontal Figure 2 3 Vertical Figure 2 4...

Страница 17: ...isit the Newland website or contact your dealer Figure 2 5 Ambient Light The EM27 shows better performance with ambient light However high frequency pulsed light can result in performance degradation...

Страница 18: ...physical interface of the EM27 consists of a 8 pin box connector 8 pin box connector can be used as RS 232 interface or USB interface The figure below illustrates the position of the connector on the...

Страница 19: ...anning is activated until a barcode is decoded or the decode session timeout expires pulse width 25ms The duration can be programmed To learn how to program the parameter please see the EM27 user guid...

Страница 20: ...Specifications Unit mm The EM27 is equipped with a 8 pin box connector 8 pin Box Connector The 8 pin box connector on the EM27 is supplied by Xiamen PinToPin Electronic Technology Co Ltd Model No 1 0...

Страница 21: ...15 Dedicated Cable for 8 pin Box Connector The dedicated cable can be used to connect the engine s 8 pin box connector to a host device Cable for 8 pin Box Connector USB interface Figure 3 3...

Страница 22: ...16 Cable for 8 pin Box Connector RS 232 interface Figure 3 4...

Страница 23: ...e connector Hot plugging could damage the 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 res...

Страница 24: ...meter Standard pk pk Unit EXT_VCC 250 mV EXT_VCC Ripple Figure 4 2 I O Voltage Table 4 3 Parameter Condition Minimum Typical Maximum Unit VIL Low Level Input Voltage 0 3 0 0 8 V VIH High Level Input V...

Страница 25: ...19 Operating Current Table 4 4 VCC 5 0V 25 Description State Peak Current RMS Unit Working Current VDD 5 0V 625 mA Standby Current 62 mA Peak Current Figure 4 3 Working Current Figure 4 4...

Страница 26: ...20 Standby Current Figure 4 5...

Страница 27: ...alize the engine Operate the engine via the host 1 3s later after the engine is powered on 2 Before powering off the engine ensure that data transmission via its communication interface s is complete...

Страница 28: ...22 Serial Communication Waveform Figure 4 7 USB Communication Waveform Figure 4 8...

Страница 29: ...rence Circuit External Circuit Design Good Read LED Circuit The circuit below is used to drive an external LED for indicating good read Figure 5 1 Beeper Circuit The circuit below is used to drive an...

Страница 30: ...24 Trigger Circuit The circuit below is used to provide the engine with a signal to trigger a scan and decode session Figure 5 3...

Страница 31: ...6 Auxiliary Tool The EM27 provides the following tool to assist users in engine configuration EasySet EasySet is a Windows based configuration tool developed by Newland which can be used to configure...

Страница 32: ...SCANNING MADE SIMPLE Newland EMEA HQ 31 0 345 87 00 33 info newland id com newland id com Need more info Contact us or one of our partners at newland id com partners...

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