Newland NLS-EM20 Quick setup guide

NLS-EM20
OEM Scan Engine
Integration Guide

2
Disclaimer
© 2015-2016 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.nlscan.com

Revision History
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

Table of Contents
Chapter 1 Introduction.......................................................................................................................................1
Overview .......................................................................................................................................................1
Illumination....................................................................................................................................................1
Aimer.............................................................................................................................................................1
Chapter 2 Installation.........................................................................................................................................2
General Requirements..................................................................................................................................2
ESD........................................................................................................................................................2
Dust and Dirt..........................................................................................................................................2
Thermal Considerations.........................................................................................................................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

Chapter 4 Interfaces.........................................................................................................................................11
Connections & Pinouts................................................................................................................................11
TTL-232 ...............................................................................................................................................12
USB......................................................................................................................................................13
Micro USB............................................................................................................................................13
Host 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

1
Chapter 1 Introduction
Overview
TM
The EM20 OEM scan engine, armed with the Newland patented , a computerized image recognition
system, brings about a new era of 2D barcode scan engines.
The EM20’s 2D barcode decoder chip ingeniously blends technology and advanced chip design &
manufacturing, which significantly 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 have an aimer. Barcodes presented at supported scan angles and within supported
scan distances are to be read.

2
Chapter 2 Installation
General Requirements
ESD
ESD protection has been taken into account when designing the EM20 and 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 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.
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, the following
precautions should be taken into consideration when integrating the EM20.
Reserve sufficient space for good air circulation in the design.
Avoid wrapping the EM20 with thermal insulation materials such as rubber.

3
Installation Orientation
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.

4
Optics
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 close to the front of the engine (parallel) and the window should be as thin
as possible.
If the window is required to be in a tilted position, the requirements above should be met and tilt angle
should ensure no reflections 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 haze less than 1%. Whether to use an anti-reflection coating or
not depends on the material and application needs.
Scratch Resistance and Coating
Scratch on the window can greatly reduce engine performance. It is suggested to use abrasion resistant
window material or coating.

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

6
Ambient Light
The EM2096 shows better performance with ambient light and it is well able to handle the flicker in
fluorescent lights using 50-60Hz AC power. 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.

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)

8
Top View (unit: mm)

9
Chapter 3 Electrical Specifications
Power Supply
Do not power up the EM20 until it is properly connected. Be sure the power is cut off before connecting a
flexible cable to or disconnecting a flexible cable from the host interface 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 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 noise is needed.
Acceptable ripple range (peak-to-peak) : ≤50mV (≤30mV recommended).

10
DC Characteristics
Operating Voltage
Ta=23℃
Parameter
Description
Minimum
Typical
Maximum
Unit
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

11
Chapter 4 Interfaces
Connections & Pinouts
The EM20 is equipped with a 12-pin FPC connector and a Micro USB connector.
The 12-pin FPC connector can be used as TTL-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

12
TTL-232
The table below describes the pin functions of FPC connector used as TTL-232 interface.
PIN#
Signal Name
I/O
Function
1
232INV
O
Output: High = TTL-232 interface; Low = USB interface
2
VIN
-
Power: supply voltage input
3
GND
-
Ground: power and signal ground
4
RXD
I
Input: TTL level 232 receive data
5
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 trigger input to activate
the engine to start a scan and decode session
I=Input; O=Output; od=Open Drain.

13
USB
The table below describes the pin functions of FPC connector used as USB interface.
PIN#
Signal Name
I/O
Function
1
232INV
O
Output: High=TTL-232 interface; Low=USB
interface
2
VIN
-
Power: supply voltage input
3
GND
-
Ground: power and signal ground
4
D-
I/O
Input/Output: USB D- signal
5
Reserved
O
Reserved
6
D+
I/O
Input/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 = Output; od = Open Drain.
Micro USB
The Micro USB connector on the EM20 is a standard connector and can be used accordingly.

14
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