Newland NLS-EM20-85 User manual

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Disclaimer
© 2022 Fujian Newland Auto-ID Tech. Co., Ltd. All rights reserved.
Please read through the manual carefully before using the product and operate it according to the manual. It is advised that you
should keep this manual for future reference.
Do not disassemble the device or remove the seal label from the device, doing so will void the product warranty provided by
Fujian Newland Auto-ID Tech. Co., Ltd.
All pictures in this manual are for reference only and actual product may differ. Regarding to the product modification and
update, Fujian Newland Auto-ID Tech. Co., Ltd. reserves the right to make changes to any software or hardware to improve
reliability, 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 or sublicense such software without prior written consent from the copyright holders.
This manual is copyrighted. No part of this publication may be reproduced, distributed or used in any form without written
permission from Newland.
Fujian Newland Auto-ID Tech. Co., Ltd. reserves the right to make final interpretation of the statement above.
Fujian Newland Auto-ID Tech. Co., Ltd.
3F, Building A, No.1, Rujiang West Rd., Mawei, Fuzhou, Fujian, China 350015
http://www.newlandaidc.com

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
V1.0.2
Updated PIN 4 in Table 3-2.
March 24, 2022

Table of Contents
Revision History.......................................................................................................................................................................- 3 -
About This Guide..........................................................................................................................................................................1
Introduction.......................................................................................................................................................................1
Chapter Description..........................................................................................................................................................1
Explanation of Symbols....................................................................................................................................................1
Related Documents..........................................................................................................................................................2
Chapter 1 Getting Started............................................................................................................................................................3
Introduction.......................................................................................................................................................................3
Illumination.......................................................................................................................................................................4
Buzzer..............................................................................................................................................................................4
Chapter 2 Installation...................................................................................................................................................................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................................................................................................................................................................8
Optics...............................................................................................................................................................................8
Window Placement..................................................................................................................................................8
Window Material and Color......................................................................................................................................9
Coatings and Scratch Resistance..........................................................................................................................10
Window Size..........................................................................................................................................................11
Roll, Skew and Pitch..............................................................................................................................................12
Ambient Light.........................................................................................................................................................12
Eye Safety .............................................................................................................................................................12
Chapter 3 Interfaces...................................................................................................................................................................13
Interface Pinouts ............................................................................................................................................................13
12-pin FPC Connector ...........................................................................................................................................14
8-pin Box Connector..............................................................................................................................................14

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Connector/Cable Specifications (Unit: mm)....................................................................................................................16
12-pin FPC Connector ...........................................................................................................................................16
8-pin Box Connector..............................................................................................................................................17
12-pin FPC Cable ..................................................................................................................................................18
Dedicated Cable for 8-pin Box Connector..............................................................................................................19
Chapter 4 Electrical Specifications...........................................................................................................................................21
Power Supply.................................................................................................................................................................21
DC Characteristics .........................................................................................................................................................21
Operating Voltage..................................................................................................................................................21
Ripple Noise...........................................................................................................................................................22
I/O Voltage.............................................................................................................................................................22
Operating Current..................................................................................................................................................23
Timing Sequence............................................................................................................................................................26
Power Up and Power Down Timing Sequence ......................................................................................................26
Chapter 5 External Reference Circuit.......................................................................................................................................28
External Circuit Design...................................................................................................................................................28
Good Read LED Circuit .........................................................................................................................................28
Beeper Circuit........................................................................................................................................................28
Trigger Circuit ........................................................................................................................................................29
Chapter 6 Auxiliary Tool.............................................................................................................................................................30
EasySet..........................................................................................................................................................................30

1
About This Guide
Introduction
TM
The NLS-EM20-85 OEM scan engines (hereinafter referred to as “the EM20-85” or “the engine”) are armed with CMOS
image capturer and the Newland patented , a computerized image recognition system-on-chip, featuring fast
scanning and accurate decoding on barcodes on virtually any medium-paper. The EM20-85 can be easily integrated into
OEM equipment or systems, such as handheld, portable, or stationary barcode scanners. The EM20-85 offers fully open
image acquisition interface, raw data interface and I/O interface, which enables users to easily develop their own
applications with Newland’s SDK.
※Note: This guide provides general instructions for the installation of the engine into a customer's device. Fujian
Newland Auto-ID Tech. Co., Ltd. recommends an opto-mechanical engineer should conduct an opto-mechanical analysis
before integration.
Chapter Description
Chapter 1, Getting Started
Gives a general description of the EM20-85.
Chapter 2, Installation
Describes how to install the engine, including installation information, housing
design, optical, grounding, ESD, and environmental considerations.
Chapter 3, Interfaces
Includes interface pinout and connector specifications.
Chapter 4, Electrical Specifications
Includes the electrical characteristics for the engine and timing sequences.
Chapter 5, External Reference Circuit
Provides external driver circuit diagrams.
Chapter 6, Auxiliary Tool
Introduces the useful tool you can use to configure the EM20-85.
Explanation of Symbols
•This symbol indicates lists of required steps.
※This symbol indicates something important to the readers. Failure to read the notice will not lead to harm to the reader,
device or data.
△
！This symbol indicates caution that, if ignored, may cause data or device damage or even personal injury.

2
Related Documents
•8-pin box connector specification, Xiamen PinToPin Electronic Technology Co.,Ltd., Model: 1.0T-8AWB,
http://www.ptpxm.com/
•12-pin FPC connector specification, Shenzhen Mos Electronic Technology Co.,Ltd., Model: 0.5-18-12PBX-AL-P,
http://www.msdzsz.com/

3
Chapter 1 Getting Started
Introduction
The EM20-85 is an area image engine for barcode reading. It includes four illumination LEDs and a 12-pin FPC connector
and a 8-pin box connector.
LED Compliance Statement
The EM20-85 complies with IEC 62471:2006 for LED safety.
The EM20-85 contains:
•a CMOS image sensor and its lens
•four LEDs
•a 12-pin FPC connector
•a 8-pin box connector
Figure 1-1 System Block Diagram
The 12-pin FPC connector/8-pin box connector on the engine can be connected to a host device with an appropriate cable.
For more information about this connector, please see Chapter 3.

4
Illumination
The EM20-85 has four white LEDs for supplementary lighting, making it possible to scan barcodes even in complete
darkness. The illumination can be programmed On or Off.
Buzzer
The EM20-85 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 programmable by the
user. To learn how to program these parameters, please see the EM20-85 user guide.

5
Chapter 2 Installation
Introduction
This chapter explains how to install the EM20-85, including general requirements, housing design, and physical and optical
information.
△
！Caution: Do not touch the imaging lens when installing the engine. Be careful not to leave fingerprints on the lens.
General Requirements
ESD
ESD protection has been taken into account when designing the EM20-85. However, due to limited board space, additional
ESD protection, such as TVS protection, is not provided on the engine’s I/O interface. 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
sure grounding wrist straps and properly grounded work areas are used.
Dust and Dirt
The EM20-85 must be sufficiently enclosed to prevent dust particles from gathering on the lens and circuit board. Dust and
other external contaminants will eventually degrade the engine’s performance.
Ambient Environment
The following environmental requirements should be met to ensure good performance of the EM20-85.
Table 2-1
Operating Temperature
-20°C ~ 60°C
Storage Temperature
-40°C ~ 75°C
Humidity
5% ~95% (non-condensing)

6
Thermal Considerations
Electronic components in the EM20-85 will generate heat during the course of their operation. Operating the EM20-85 in
continuous mode for an extended period may cause temperatures to rise on CPU, CIS, LEDs, etc. Overheating can
degrade image quality and affect scanning performance. Given that, the following precautions should be taken into
consideration when integrating the EM20-85.
Avoid continuous use of LEDs for prolonged periods.
Reserve sufficient space for good air circulation in the design.
Avoid wrapping the EM20-85 with thermal insulation materials such as rubber.
Optical Elements
Windows should be designed to prevent the surface of lens from being exposed to contaminants such as dust, liquids, or
grease, which may lead to damage to lens and degrade scanning efficiency.
During installation, keep the surface of lens away from any objects to prevent scratching and contamination of lens. The
operator should avoid talking directly towards lens.

7
Mounting
The illustrations below show the mechanical mounting dimensions (unit: mm) for the EM20-85.
Figure 2-1

8
Housing Design
※Note: Conduct an optical analysis for the housing design to ensure optimal scanning and 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 cause problems. Avoid any highly reflective objects around the
engine that can cause bright spots to appear in the captured image. It is recommended to use baffles or matte-finished dark
internal housing colors.
Optics
The EM20-85 uses a sophisticated optical system. An improperly designed internal housing or improper selection of
window material can degrade the engine’s performance.
Window Placement
The window should be positioned properly to let the illumination and aiming beams pass through as much as possible and
no reflections back into the engine (reflections can degrade the reading performance).
The window should be mounted directly against the front of the engine (a=0).
Figure 2-2

9
Window Material and Color
Window material must be clear. Use only cell-cast plastics or optical glass. PMMA and chemically tempered 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-reflection (AR) coating on it.
•PMMA (Cell-cast acrylic): When fabricated by cell-casting, has very good optical quality and low initial cost, but surface
must be protected from the environment due to its susceptibility to attack by chemcials, mechanical stresses, and UV
light. Reasonably good impact resistance.
•Chemically tempered glass: Glass is a hard material which provides excellent scratch and abrasion resistance. But
unannealed glass is brittle. Increased flexibility strength with minimal optical distortion requires chemical tempering.
Glass is hard to be cut into odd shapes and can not be ultrasonically welded.
Table 2-2
Specification
Description
Thickness
0.8-2.0mm
Wavefront Distortion
PV maximum: 0.2λ
RMS maximum: 0.04λ
Clear Aperture
1.0mm to edges
Surface Quality
60-20 scratch/dig
Pay extra attention to the light wavelength when using plastic materials. Colored windows are not recommended if the
engine is used to scan barcodes on moving objects.

10
Coatings and Scratch Resistance
Scratch on the window can greatly reduce the performance of the EM20-85. It is suggested to use abrasion resistant
window material or coating.
The following introduces two commonly-used types of coatings:
•Anti-reflection coatings: Anti-reflection (AR) coatings can be 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 400-780nm.
•Scratch resistance coatings: Scratch resistance coatings require a degree of greater than 5H in its hardness. Coatings
can be applied to plastic surfaces to increase the surfaces’ abrasion and scratch resistance.
Both tempered glass and plastic windows can be AR coated. However, it is easier and more cost-effective to put an AR
coating on the glass than on the plastic.
The AR coating specifications below should be met when using an AR coated window.
Single side AR coating: 92% minimum transmittance within spectrum range from 420 nm to 730 nm.
Double side AR coating: 97% minimum transmittance within spectrum range from 420 nm to 730 nm.

11
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

12
Roll, Skew and Pitch
Three different reading angles, roll, skew and pitch are illustrated in Figure 2-6. Roll refers to rotation around the Z axis,
skew to rotation around the X axis and pitch to rotation around the Y axis. For the engine’s technical specifications, please
visit the Newland website or contact your dealer.
Figure 2-5
Ambient Light
The EM20-85 shows better performance with ambient light. However, high-frequency pulsed light can result in performance
degradation.
Eye Safety
The EM20-85 has no lasers. It uses LEDs to produce 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.

13
Chapter 3 Interfaces
Interface Pinouts
The physical interface of the EM20-85 consists of a 8-pin box connector and a 12-pin FPC connector:
•8-pin box connector can be used as RS-232 interface or USB interface.
•12-pin FPC connector can be used as TTL-232 interface or USB interface.
The figure below illustrates the position of connectors on the EM20-85.
Figure 3-1

14
12-pin FPC Connector
The following table lists the pin functions of the 12-pin FPC connector.
Table 3-1
PIN#
Signal
I/O
State
Function
Remark
1
EXT_TRIG#
I
High Level
External trigger control signal (active low)
See Note 1
2
EXT_RST#
I
High Level
External reset control signal (active low)
See Note 2
3
EXT_DSF
O
Low Level
External good read LED control signal (active
high)
See Note 3
4
EXT_BUZ
O
Low Level
External beeper control signal (active high)
See Note 4
5
NC
-
-
-
6
USB_D+
Two-way
High Level
USB_D+ signal
7
USB_D-
Two-way
Low Level
USB_D- signal
8
TTL232_TX
O
High Level
TTL level 232 transmit data
9
TTL232_RX
I
High Level
TTL level 232 receive data
10
GND
Power Supply
-
Power-supply ground
11
EXT_VCC
Power Supply
-
5V power supply input
12
NC
-
-
-
8-pin Box Connector
The following table lists the pin functions of the 8-pin box connector.
Table 3-2
PIN#
Signal
I/O
State
Function
Remark
1
EXT_VCC
Power Supply
-
5V power supply input
2
GND
Power Supply
-
Power-supply ground
3
EXT_TRIG#
I
High Level
External trigger control signal (active low)
See Note 1
4
EXT_ DSF
O
Low Level
External good read LED control signal
(active high)
See Note 3
5
USB_D+
Two-way
High Level
USB_D+ signal
6
USB_D-
Two-way
Low Level
USB_D- signal
7
RS232_TX
O
Low Level
RS-232 transmit data
8
RS232_RX
I
Low Level
RS-232 receive data

15
※I = Input; O = Output
※1 This external trigger signal can be either level trigger or pulse trigger.
Level trigger: The trigger signal is generated via the external trigger pull or the external IO interface. A trigger pull
activates a decode session (duration:≥25ms). Ensure the level of trigger signal maintains unchanged during the
decode session.
Pulse trigger: When the trigger signal is detected, scanning 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 EM20-85 user guide.
For the external trigger circuit, please see the “Trigger Circuit” section in Chapter 5. If the EXT_TRIG# pin is not used,
leave it unconnected.
※2 Giving a 20μs low pulse on the EXT_RST# pin of the 12-pin FPC connector will reset the engine. If this pin is not used,
leave it unconnected.
※3 This output signal can be used by an external LED to indicate good read status.
The EXT_DSF pin produces a high output (default duration: 20ms, user-programmable) when a good read occurs. To
learn how to program these parameters, please see the EM20-85 user guide.
For the external LED circuit design, please see the “Good Read LED Circuit” section in Chapter 5. If the EXT_DSF pin
is not used, leave it unconnected.
※4 This output signal can be used by an external beeper circuit to generate audible feedback to the user to indicate
power-on and good read statuses.
Power On beep: The EXT_BUZ pin produces a PWM output (duration: 400ms; frequency: 2090Hz, 2630Hz, 3130Hz
and 4260Hz.) 215ms after power-on. The beep can be programmed On or Off. To learn how to program the parameter,
please see the EM27 user guide.
Good Read beep: The EXT_BUZ pin produces a PWM output (default duration: 80ms; frequency: 2710Hz, 3940Hz,
4800Hz) when a good read occurs. Default frequency is 2710Hz. The beep can be programmed On or Off. To learn
how to program these parameters, please see the EM27 user guide.
For the external beeper circuit design, please see the “Beeper Circuit” section in Chapter 5. If the EXT_BUZ pin is not
used, leave it unconnected.