A PC-connectable communication protocol analyzer, which can also be used
as a stand-alone communication data logger that supports SD cards


Async Communication Supported

This model is discontinued. The successor is LE-150PR.
LE-150PS is a lightweight communication protocol analyzer has a Data Logger function to record data in the SD card for long hours. It is an entry model designed for Asynch communication with excellent cost-performance.

Two Types of Operations Based on Usage Situation.

This device can be used as a PC-connectable Protocol Analyzer for use in the lab (Remote mode), and also as a PC-less Data Logger for use a ton-site tests to record data for long hours (Logger mode).

<Remote Mode>
<Logger Mode>

Supports RS-232C/RS-422/RS-485 (Standard Feature)

The device comes standard with RS-232C/RS-422/RS-485 interfaces, which are used widely in medical equipment and electronic products.

RS-232C interface supports 8 lines including control lines and it is able to operate the control lines automatically at Simulation function. RS-422/485 interface is able to control the driver automatically at Simulation function.

Explanation of each part
Dust-proofing cover
DC Jack
Two-color LED
M3 Screw Holes*1
External Signal Terminal
slotUSB connectorDC
switchSD card slotUSB
*   For attaching the optional DIN rail plate.
Pitch: 70mm. Depth: 3.5mm (max).
*   Above picture is the LE-200PS. (Specification of each part is same in LE-150PS and LE-200PS.)
Pin Assignment of Connector (DSUB 25pin)
Pin Signal Pin Signal
1 FG 14 -
2 RS-232C SD 15 -
3 RS-232C RD 16 -
4 RS-232C RS 17 -
5 RS-232C CS 18 RS-422/485 TXDB+/TR+*2
6 RS-232C DR 19 RS-422/485 TXDA-/TR-*2
7 GND*2 20 RS-232C ER
8 RS-232C CD 21 -
9 +5VDC*1 22 RS-232C CI
10 RS-422 RXDB+*2 23 -
11 RS-422 RXDA-*2 24 -
12 - 25 -
13 -    
*1: A terminal-supplied power from analyzer. ON/OFF switchable.
*2: LE-5TB is useful for connecting the signals.
Do not allocate power supply of more than 6V to its 9/10/11/18/19 pin on the Dsub 25pin connector. It may cause the product malfunction.
RS-485 Connection Image

Terminal Block Adapter (LE-5TB)

Connection of Terminal Block Adapter (LE-5TB)

DB25   Terminal Block
18Φ        ΦTxD+
19Φ        ΦTxD-
10Φ        ΦRxD+
11Φ        ΦRxD-
Supprts TTL level communication with an option.
< Image of Use >

With an optional TTL probe pod (OP-5M), it can monitor TTL-level communication at 2.5V/ 3.3V/ 5V. It is useful such as when measuring TTL signals on an UART port of PCB and communication units.

Support Async PPP communication

Support Async and PPP communications. It is possible to select bit transmission order, polarity, and data format (NRX/NRX) and able to analyze efficiently.

<Monitoring Async >
<Monitoring with Control Lines>
< ASYNC/SYNC Display in each frame >
<Translation Display>
Trigger Configuration (Example 1)

In this setting, if finding an error, “1” will be added in the “Conter1”. Details of counters can be checked by selecting Timer/Counter window. And, the value of counter can be another trigger condition.

Trigger Configuration (Example 2)

In this setting, if finding data of “41h, 42h, 43h, 15h”, LED of U1 will be lighted. It is useful to check the flowing of specific data on the line without stopping the measurement.

Lights of LED stands for:
POWER/ERROR Indicate the operating status of analyzer
RUN/ACT Indicate that analyzer is measuring or accessing to the SD card.
SD/RD Indicate the status of SD line (green light) and RD line (red light).
U1/U2 Able to light the U1 (green) /U2 (red) by trigger actions.
Long Hour Recording

[Recording Time]

Baud Rate

Capacity: 2G byte

(e.g. 2M byte×100 files)
9600bps Approx. 120 Hours
230.4Kbps Approx. 5 Hours
*: In the case of full-duplex transmission of 1Kbyte data at 1ms interval.

Measured data is saved as log files of the specified file size in the HDD of the PC (Remote mode) or in the SD card of the analyzer (Logger mode).

It automatically records data until reaching the specified number of files, and then deletes the oldest file to record the new file. Also, it can stop measurement on reaching the specified number of files. It is useful for detecting any hindrance in the line.

<Record Control Setting in Remote mode>
<Record Control Setting in Logger Mode>
Measures at Arbitrary Speed

Monitor data at any speed by setting the baud rate of any four digits.

The high-precision timer makes it possible to record idle time and time stamps along with data, and is not related to the performance of the PC.

<Configuration Setting>
Easy-to Operate Simulation Function

It incorporates an easy-to-use simulation function that makes it possible to transmit preset transmission data (16 types of data), or fixed data such as FOX messages, at the flip of a key while checking reception data.

<Example of Simulation>

Schedule Measurement by Inner RTC

Real Time Clock (RTC) backed up by the battery of the analyzer makes it possible to specify the starting and ending times of the measurement. After the measurement, it turns off the power automatically and saves on power consumption.

<Auto RUN/STOP Setting>
Example of Use 1
<Configuration of Example1>

Measure while the factory runs operation from 9:00 to 17:30.

Saving Mode Append
Max Files 450
File Size 4M
Mode Daily
Run Time 9:00
Stop Time 17:30
Power On Run off

LED of LE-150PS will start blinking at 8:59 and be ready for measurement. It will start measuring at 9:00 and record data in the SD card for 450 files (4M each) as a ring buffer. It will stop measuring at 17:30 and turn off the power automatically to save on power consumption.


*   LE-150PS will start measuring from the next day if configuration is set after 9:01. To start measuring soon after the configuration, select the “Power On Run”.
*   If the trigger action (stop measurement) is satisfied, LE-150PS turns off the power automatically to save on power consumption.
Example of Use 2
<Configuration of Example2>

Equipment communicates with other equipment while it receives power from a power supply randomly.

Saving Mode Append
Max Files 500
File Size 1M
Mode Daily
Run Time non
Stop Time non
Power On Run on
 (safety start)

In this care, it is necessary to prove power to the LE-150PS from the same power supply for the equipment.

Safety start will start measuring approximately 40 seconds (LED will be blinking) after powering on the analyzer for charging the capacitor for back-up data.

Communication logs will be saved in the SD card for 500 files (1M each) endlessly. LE-150PS will stop measuring when the power is not supplied for more than 1 second after saving data in the SD card.


*   To record data soon after the power is supplied, select “Quick Start”. However, it is possible that SD card will be damaged from power failure.


Seamless Access to Communication Log Files
<Text Conversion Setting>

Communication log files can be viewed in detail on a PC. It offers seamless operation that handles a single measurement log file even when all files are read collectively. The measured data can be converted into text or CSV format to use in a word processor and/or spreadsheet software.

[Example of Text Converted Data]
*===============[2012-06-06 00:02:00]=*
* Model     : LE-150PS                *
* Version   : 1.06                    *
* Serial No.: ********                *
* Start time: 2012-06-06 00:00:00     *
* Stop time : 2012-06-06 00:01:00     *
* MONITOR DATA                        *
*  PROTOCOL: ASYNC                    *
*  S-SPEED : 9600    R-SPEED : 9600   *
*  CODE    : ASCII   CHAR BIT: 8      *
*  PARITY  : NONE    STOP BIT: 1      *
*  BCC     : NONE                     *
*                 PRINT CODE : ASCII  *

SD:[ IDLE ][ TMSP ] - - - - - - - - - - - - - - - - - - - -
   [ 0384 ][060810]
RD:                3131323030303030323036303133303031303030
                    1 1 2 0 0 0 0 0 2 0 6 0 1 3 0 0 1 0 0 0

SD: - -[ IDLE ][ TMSP ]06[ IDLE ][ TMSP ] - - - - - - - - -
       [ 0015 ][060810]AK[ 0467 ][060811]
RD:0D0A                 -                313132303030303032
   CRLF                                   1 1 2 0 0 0 0 0 2

SD: - - - - - - - - - - - - -[ IDLE ][ TMSP ]06[ IDLE ][ TM
                             [ 0015 ][060811]AK[ 0411 ][060
RD:30373031333030313030300D0A                 -
    0 7 0 1 3 0 0 1 0 0 0CRLF

SD:SP ] - - - - - - - - - - - - - - - - - - - - - -[ TMSP ]
   812]                                            [060812]
RD:    31313230303030303230383031373730313030300D0A
        1 1 2 0 0 0 0 0 2 0 8 0 1 7 7 0 1 0 0 0CRLF

SD:15[ IDLE ][ TMSP ] - - - - - - - - - - - - - - - - - - -
   NK[ 4725 ][060820]
RD: -                31313230303030303230393031373530313030
                      1 1 2 0 0 0 0 0 2 0 9 0 1 7 5 0 1 0 0

SD: - - -[ IDLE ][ TMSP ]06[ IDLE ][ TMSP ] - - - - - - - -
         [ 0072 ][060820]AK[ 0651 ][060821]
RD:300D0A                 -                3131323030303030
    0CRLF                                   1 1 2 0 0 0 0 0

Control multiple analyzers by one PC software.

PC link software (LE-LINK20) included with the product controls multiple analyzers at the same time, and displays data in the separate measurement windows.

Can be used in Various Situation

Protects Important Data from Corruption due to Power Failure

A newly developed Instant Power Failure Prevention circuit with a Super Capacitor protects important communication log files stored in the SD cards. It protects data in case it occurs the power failure during recording to the SD card. Also, you can select the restart method of measurement from "Instant Start" or "After Charging Super Capacitor". Thus, continuous recording is possible while considering the status of data generation and power system.

[Acquired Patent in Japan]

Small and Robust Housing Suitable for Severe Field Environments
< Dust-proof covers >

< DIN Rail Installation Example >

The palm-sized robust unit can be used between –10 to +55°C. It operates not only on USB bus power, but also on external DC power of 8 to 26.4V. The consumption current is as low as 100mA at DC12V input. The SD card slot and the USB connector are equipped with a dust-proof cover that allows 2-way operation. It can be fixed easily to the equipment to be examined or built into an inspection line, since it is compatible with 35mm DIN rails.

Automatically Switches between Japanese and English

The system language alternates automatically between English and Japanese according to that of OS. This facilitates introduction of the software to development bases outside Japan.


Model LE-150PS
Interface Standard: RS-232C /RS-422 /RS-485   Optional: TTL(Model: “OP-5M”)
Measurement Connecter DSUB 25pin, Female connecter (M2.6) 
Baud Rate 50bps-500Kbps (arbitrary)
Data Format NRZ
Data Code ASCII, EBCDIC, JIS7, JIS8, Baudot, Transcode, IPARS, EBCD, EBCDIK, HEX
Bit transmission order, Polarity Order: LSB first/ MSB first (switchable), Polarity: Normal/ Invert (switchable)
Error Check Parity(ODD, EVEN, MARK, SPACE), Framing, Break, Abort (LE-200PS only), Short frame (LE-200PS only), BCC(LRC, CRC-6, CRC-12, CRC-16, CRC-ITU-T, FCS-16(LE-200PS only), FCS-32(LE-200PS only). BCC permeation mode
Memory PC:Max. 8G byte on the HDD, PC-less: capacity of the SD card (specify the file size at 128K /1M /2M /4M /8M byte)
Recording Type Ring Buffer (continuous) mode, Fixed Buffer (full stop) mode
Mode Remote mode(with PC), Data Logger mode (PC less)
Measurement start/stop Control from PC, Start/Stop switch, Auto-Power run, Specify date and time.
Idle Time OFF(no-record); Resolution: 100ms, 10ms, 1ms; Max. 999. 9s
Time Stamp OFF (no record); Date time stamp: “Day/Hr/Min”, “Hr/Min/Sec” or “Min/Sec/10ms”
Line Status Measurement Record signals (RS(RTS), CS(CTS), ER(DTR), DR(DSR), CD(DCD), CI(RI), EXIN) with transmission/reception data. Waveform display (RS-232C only)
Protocol translation display on PC PPP
Trigger Condition Communication error, data string up to 8 characters (don’t care and bit mask available), idle time more than the specified duration, matched timer/counter value, logic status of interface signal line, external signal.
Action Stop measurement (offset can be set), validate/invalidate trigger condition, control timer/counter, send specified data string, send external signal, turn on/ off the light of user defined LED
Retrieval function on PC Communication error, data string up to 8 characters (don’t care and bit mask available), idle time more than the specified duration, time stamp (don’t care available), trigger-matched data.
Simulation Transmit data registered in 16 data tables (16K byte) with one pressing a key. 
DTE/DCE mode selectable. Pre-set the timing of line/data. Insert parity error. 
Conversion Convert data into Text or CSV format and save.
LED 4 of two-color LED: Power/ Error, Test/Record, SD/RD, User defined U1/U2
Switch One: Run / STOP
External Trigger Input: 1, Output: 2. 2.54mm pin header connector
SD Card  2G-8G byte
USB 2.0 Port Mini-B connector High speed supported
Power*1 Remote mode: USB bus power
Logger mode: External DC power (DC8-26.4V), AC adapter (6A-181WP09).
Power consumption: 0.8W (Max.1.6W for about 10sec after turning on).
0.1W/DC12V when turning off.
Work time during Power failure  1sec
Ambient Temperature,
In operation:-10-+55°C In storage: -20-+60°C 5 - 85%RH (No condensation)
Standard CE(class A), EMC(EN61326-1 : 2006)
Dimension, mass 86(W)×130(D)×30(H) mm approx. 220g
Environment of PC OS: Windows® XP/Vista/7/8  PC: PC/AT compatible
Accessories PC software, Mini-USB cable, DSUB 25pin monitor cable, external signal I/O cable, 8G byte SDHC card*2
Name Model Description
8GB SDHC card SD-8GX 8GB SDHC card
DSUB 25pin monitor cable LE-25M1 DSUB 25pin
DSUB 9pin monitor cable LE-259M1 DSUB 9pin. For RS-232C interface.
TTL monitor probe pod OP-5M Probe pod unit to monitor TTL.
Terminal Block Adapter LE-5TB Convert RS-422/485 port into terminal block.
DIN Rail Mounting Plate LE-DIN13 To mount the analyzer on the 35mm DIN rail.
Power Plug Cable SIH-2PG DC power to the DC jack of the analyzer.
Wide Input AC adapter 6A-181WP09 DC9V, 2A
(input AC100 to 240V, 50/60Hz)
*1: AC adapter is sold separetely. In the Remote mode (with PC), it runs by the USB bus power.
In the Logger mode (PC less), you need to have the optional AC adapter (6A-181WP09) or use the optional Power Plug Cable (SIH-2PG) and external DC power.
*2: 8GB SDHC card is included as a set of LE-150PS from July 2012.