BARTH Elektronik Mini-PLC STG-680 User manual

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Mini-PLC
STG-680
Art. No. 0850-0680
MANUAL
© 2014-2016 BARTH Elektronik GmbH | Im Depot 1-3 | D-49838 Lengerich | www.barth-elektronik.de
® BARTH is a registered trademark. All rights reserved. 9021-0016-A
TABLE OF CONTENT
Mini-PLC STG-680
Art. No. 0850-0680
MANUAL
1 SAFETY INSTRUCTIONS ......................................2
2 DESTINATED USE ..................................................2
3 DISCLAIMER ..........................................................2
4 PRODUCT DESCRIPTION .....................................2
4.1 Features ..................................................................2
4.2 Applications ...........................................................2
4.3 General description ..............................................2
4.4 MODBUS Programming with miCon-L ...............3
4.5 Delivery content ....................................................3
5 INSTALLATION .......................................................3
5.1 Mounting ................................................................3
5.2 Wiring ......................................................................3
5.2.2 Connecting the power supply .................................4
5.2.3 Connecting the inputs .............................................4
5.2.4 Connecting the outputs ...........................................4
5.2.5 Connecting the MODBUS interface ........................4
6 OPERATION AND PROGRAMMING .....................5
6.1 Software download ...............................................5
6.2 Virtual COM port driver installation ....................5
6.3 miCon-L Software Installation ............................5
6.4 Connecting the Mini-PLC .....................................5
6.5 First steps in miCon-L ..........................................5
7 APPENDIX ..............................................................7
7.1 Specications ........................................................7
7.1.1 General ....................................................................7
7.1.2 Power supply ...........................................................7
7.1.3 Inputs .......................................................................7
7.1.4 Outputs ....................................................................7
7.1.5 MODBUS interface ..................................................7
7.1.6 Security features ......................................................7
7.1.7 Program and data memory .....................................7
7.1.8 Timebase (oscillator) ................................................8
7.1.9 Electrical connection ...............................................8
7.1.10 Electromagnetic compatibility (EMC) ......................8
7.1.11 Environmental conditions ........................................8
7.1.12 Weight and dimensions ...........................................8
7.1.13 Ordering information ...............................................8
7.2 Documents, videos and software .......................8
7.3 Disposal ..................................................................8
7.4 Conformity declaration ........................................8

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Mini-PLC
STG-680
Art. No. 0850-0680
MANUAL
© 2014-2016 BARTH Elektronik GmbH | Im Depot 1-3 | D-49838 Lengerich | www.barth-elektronik.de
® BARTH is a registered trademark. All rights reserved. 9021-0016-A
1 SAFETY INSTRUCTIONS
This manual contains notices which you should observe
to ensure your own personal safety, as well as to protect
the product and the connected equipment. These notices
are highlighted in the manual by a warning symbol and are
marked as follows according to the level of danger:
Only qualied personnel should be
allowed to install and work on this
equipment. Qualied persons are
dened as persons who are authorized
to commission, to ground and to tag
circuits, equipment and systems in
accordance with established safety
practices and standards.
Turn off the power supply before
performing any wiring operations!
Short circuits can be harmful, critical and
can cause explosions and serious burns!
Please read this manual carefully and
observe all safety instructions!
2 DESTINATED USE
The Mini-PLC is designed for universal measuring, con-
trolling and regulating applications.
It must not be used for life critical, medical or fail safe
applications.
3 DISCLAIMER
BARTH Elektronik GmbH assumes no liability for usage
and functionality of the Mini-PLC in case of disregar-
ding this manual. The strict accordance of this manual
is important since the installation methods, peripheral
connections, usage and maintenance can not be con-
trolled by BARTH Elektronik GmbH. Therefore BARTH
Elektronik GmbH assumes no liability for any claim.
4 PRODUCT DESCRIPTION
The picture below shows the BARTH®Mini-PLC STG-680
with the connection cable VK-16 (Art. No. 0019-0016).
The Mini-PLC is shipped without the USB connection cable
VK-16.
4.1 Features
• 6 analog Inputs 0..10 VDC, 12 bit ADC
• 4 digital Inputs up to 1 kHz
• 8 Power Outputs up to 1.5 A
• 1 Power PWM Output 2 A/1 to 10 kHz
• 1 MODBUS RTU Interface
• Graphically programmable MODBUS Data
• Reliable Solid-State Outputs
• Fail Safe Oscillator
• Programmable Status LED
• TTL-232/USB Connection to PC
• Intuitive graphical Programming Capability
• Wide Operating Voltage Range 7..32 VDC
• Wide Operating Temp. Range -40..+60°C
• Ultraat Housing, Height 11 mm
• Vibration resistant and rugged Sealing
• Engineered and manufactured in Germany
4.2 Applications
• Industrial Automation
• Building Automation
• Process Control
4.3 General description
The innovative STG-680 extends the established BARTH®
Mini-PLC series with an additional model featuring a rugged
MODBUS interface with graphical programming and con-
gurating capability.
With similar dimensions in comparison to the STG-650, the
STG-680 provides outstanding graphical programming at
lowest current consumption and the well-known small form
factor.
The MODBUS interface allows the user to connect a variety
of industrial network components to the Mini-PLC.
The STG-680 does not need any peripheral components to
operate. Both inputs and outputs features highly integrated
and rugged protection circuits to operate the Mini-PLC in
really harsh environment. These outstanding features open
up a variety of application elds in industrial and also in bat-
tery-powered applications.
The STG-680 is also available as customer-tailored OEM
version.

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Art. No. 0850-0680
MANUAL
© 2014-2016 BARTH Elektronik GmbH | Im Depot 1-3 | D-49838 Lengerich | www.barth-elektronik.de
® BARTH is a registered trademark. All rights reserved. 9021-0016-A
4.4 MODBUS Programming with miCon-L
Without learning a difcult programming language the
BARTH®Mini-PLC can be easily programmed using sim-
ple and vivid graphical function blocks. This block design
meets graphical standards of the latest graphical program-
ming languages.
The miCon-L software suite features MODBUS program-
ming, simulation and test in one unique software design
tool. The exible programming option offers a variety of
possibilities in industrial applications.
Programming the STG-680 follows using the USB port
of your PC with installed miCon-L software suite and the
VK-16 USB Connection Cable. The miCon-L Software sup-
ports full simulation and visualisation operation modes.
miCon-L provides a variety of visualisation blocks and
interactive elements to control and debug the Mini-PLC.
For detailed information please read the BARTH®miCon-L
manual and the BARTH® Application Notes on:
www.micon-l.de
www.barth-elektronik.de
4.5 Delivery content
• BARTH®Mini-PLC STG-680
• Spring terminal connectors (for supply, MODBUS, I/O)
5 INSTALLATION
5.1 Mounting
The Mini-PLC must be installed and wired
by a trained technician who knows and
complies with both the universally appli-
cable engineering rules and the regulati-
ons and standards that apply in specic
cases.
Fastening the STG-680 follows using either the integrated
mounting holes for screws or the holes for cable ties. The
cable tie installation method is recommended for fastening
the STG-680 on wiring harness, tubes or other mechanical
parts.
Take care to meet the environmental conditions of the
STG-680.
5.2 Wiring
5.2.1 Overview
The graphic below shows the connection layout of the
BARTH®Mini-PLC STG-680.
X1 connector: supply and MODBUS pins
X2 connector: inputs
X3 connector: outputs
X4 connector: TTL-232/USB interface (via VK-16)

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Art. No. 0850-0680
MANUAL
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® BARTH is a registered trademark. All rights reserved. 9021-0016-A
5.2.4 Connecting the outputs
Depending on load type and current the STG-680 is able
to drive electric loads directly without any additional driver
or protection circuit. The Mini-PLC provides 4 digital solid-
state highside outputs and 1 solid-state lowside switch.
Common features of outputs OUT1 to OUT8
• Rugged solid-state higside switch up to 1.5A
• Paralleling permissible up to 6A
• Short circuit protection and current limitation
• Fast demagnetization of inductive loads
• Stable behaviour at undervoltage
• Comprehensive integrated protection circuits
• Outstanding electromagnetic compatibility (EMC)
• Electrostatic discharge protection (ESD)
Features of output OUT9
• Solid state lowside switch with PWM capability
• Sinks up to 2A
• Rugged solid-state design
• Fast demagnetization of inductive loads
• Outstanding electromagnetic compatibility (EMC)
• Electrostatic discharge protection (ESD)
The 9-pole connector X3 contains the digital outputs of
the Mini-PLC. While OUT1 to OUT8 are overload-protected
highside switches, OUT9 is carried out as lowside switch
with PWM capability without short circuit protection. A logi-
cal HIGH within miCon-L will switch the Mini-PLS´s supply
voltage at OUT1 to OUT8, while OUT9 switches lowside
(GND). Aviod a sink current exceeding 2A at OUT9 because
this outputs is not protected against short-circuiting or
overload current !
The total current sourced by OUT1 to
OUT8 must not exceed 6A!
Avoid reverse voltage at any output higher
than the Mini-PLC´s supply voltage!
OUT5 provides NO short circuit protection.
Take care the sink current not exceeds 2A!
Negligence may cause irreversible
damage of the Mini-PLC!
Please refer to the appendix for detailed electrical speci-
cation of the outputs.
5.2.5 Connecting the MODBUS interface
The X1 connector of the STG-680 contains the MODBUS-
specic RS-485 pins ‚A‘ and ‚B‘.
The voltage at A or B must not exceed -10
or +15 VDC referred to ground (GND). Hig-
her voltages may cause irreversible dama-
ge of the Mini-PLC!
There is no termination resistor integrated in the STG-680.
Please refer to the appendix for detailed electrical speci-
cation of the MODBUS interface.
5.2.2 Connecting the power supply
The STG-680 features an outstanding wide supply voltage
range from 7 to 32 VDC at lowest current consumption.
So the Mini-PLC can be integrated within battery supplied
12V or 24V DC systems (cars, trucks, battery powered cars,
forklifts and digger, for example).
Turn off the power supply before perfor-
ming any wiring operations!
False electrical connection, voltage
reversal or disregarding the electrical
specications may cause irreversible
damage of the Mini-PLC!
Connect the supply voltage of 7 to 32 VDC to the 4-pole
terminal X1 of the STG-680. Wire the positive supply to the
‚+VDD‘ marked connection. The negative (ground) will be
wired to the ‚GND‘ connection. All terminals are carried out
as plugable spring terminal connectors for a wire gauge of
0.25 to 1.5mm².
Ensure correct power supply voltage
range and polarisation! External fusing of
5A max. is mandatory! Disregarding may
cause irreversible damage of the PLC!
5.2.3 Connecting the inputs
You can connect sensors, switches or buttons to the inputs.
The sensors may be temperature, ow, pressure, photo-
electric sensors or proximity switches, for example.
The STG-680 is well suitable for any sensor featuring a vol-
tage output, 0 to 10 VDC, for example.
Common features of the inputs
• IN1 to IN6 are selectable analog/digital inputs
• IN7 to IN10 are pure digital inputs (up to 1kHz)
• Wide input voltage range 0 to 32VDC
• IN1 to IN6 are 0 to 10 V compatible
• Comprehensive integrated protection circuits
• Outstanding electromagnetic compatibility (EMC)
• Electrostatic discharge protection (ESD)
Due to the pull-down resistors integrated in the STG-680
any switch (NO/NC) can simply be connected between the
positive supply (VDD) of the STG-680 and the desired input.
The voltage at any input must not exceed
32VDC referred to ground (GND).
Higher voltages or reverse voltage lower
than -32VDC may cause irreversible
damage of the Mini-PLC!
The 10-pole connector named X2 contains the inputs of
the Mini-PLC. While IN7 to IN10 are pure digital inputs, IN1
to IN6 provide both digital or analog (0-10V) functionality.
The voltage range for all inputs may not exceed 32 VDC.
All inputs refer to GND. Please refer to the appendix for
detailed electrical specication of the inputs.

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® BARTH is a registered trademark. All rights reserved. 9021-0016-A
6 OPERATION AND PROGRAMMING
6.1 Software download
BARTH®supplies a free software license download package
for Microsoft®WINDOWS®which includes:
• Virtual COM port driver for USB connection
• miCon-L Software Suite
• Sample Programs for BARTH® Mini-PLC
Please download this package from:
www.micon-l.de
6.2 Virtual COM port driver installation
Before you connect the Mini-PLC to the PC you have to ins-
tall the USB-/COM-port driver (folder ‚USBdriver‘) from the
software download package. Please follow the instructions
of the SETUP routine.
6.3 miCon-L Software Installation
Now install the miConL software suite from the ‚miCon-L‘
folder. Select your language le and follow the setup inst-
ructions of miConL.
6.4 Connecting the Mini-PLC
To operate the STG-680, rst establish proper power supply
connection to the X1 connector.
For programming and PC connection the USB connection
cable VK-16 (Art. No. 0091-0010) and a PC with installed
Windows operating system are mandatory.
For Mini-PLC connection please use the 3-way X4 terminal.
6.5 First steps in miCon-L
Establish the PC connection using the VK-16 connection
cable and run miConL. For choosing the correct virtual
COM-Port please click the right button (congure serial
interface) located on the main menu page and conrm the
added virtual COM-Port used by the STG-680.
Now start miConL with creating a new project (Project->
New) or open a miCon-L sample application (Project-
>Open).

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MANUAL
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® BARTH is a registered trademark. All rights reserved. 9021-0016-A
Creating a new project the desired Mini-PLC model and the
project name have to be dened. After opening or creating
a project the workspace of miConL with it´s libraries (right)
is shown.
Additional help and a detailed user manual is provided
within the miCon-L help and the miConL context menu
(right mouse button).
You can nd sample programs in the ‚SAMPLE_PROGS‘
folder which is part of the miCon-L download package.
For detailed information and help please have a closer look
at the documents related to the miCon-L Software Suite:
http://www.micon-l.de

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® BARTH is a registered trademark. All rights reserved. 9021-0016-A
7 APPENDIX
7.1 Specications
7.1.1 General
Hardware design BARTH®Mini-PLC
fully enclosed in proprietary PU
resin, tiny and rugged housing
with plugable spring terminal
connectors, ultra-lightweight
Programming miCon-L Software,
graphical (function block style),
simulation, MODBUS
programming and visualisation,
free license
Interfaces TTL-232 (5V TTL level)
USB (VK-16 required)
reserved for miCon-L software
communication
MODBUS RTU
7.1. 2 Power supply
Operating voltage 7 to 32 VDC
Current consumption nominal 15 mA at 32 VDC
(depending on conguration)
Fusing 8 A max. (external)
mandatory for voltage reversal
protection
Voltage reversal protection yes
(combined with external fuse)
ESD/TVS protection yes
Heat dissipation air
(at full load)
normally < 2 W
7.1.3 Inputs
Number digital 4+6
Number analog 6
Digital input IN7 - IN10 UIN = 0..30 VDC
RIN > 30 kOhm
ULOW <= 2 VDC
UHIGH > =4VDC
fIN <= 1 kHz
tIN >= 1 ms
Analog input IN1 - IN6 UIN = 0..10 VDC
RIN > 16 kOhm
fIN <= 100Hz
tIN >= 10 ms
Accuracy ADC
IN1 - IN6
± 1% (<0.15 VDC)
ADC resolution
(internal)
12 Bit
Potential isolation no (common GND)
ESD/TVS protection yes
Permissible cable lenght
(per input)
normally 40 m
7.1.4 Outputs
Number digital 8+1
Number PWM 1
Output OUT1 - OUT8 Output type: solid state (highside)
IOUT <= 1.5 A (resistive load)
@ fOUT = 0 to 100 Hz
UOUT >= UIN-0,45 V
ITOT<= 4 A (paralleling permissible)
Maximal allowable load
inductance for a single switch off
(one output):
VDD=12VDC, IL=1.5A, ZL<=70mH
VDD=12VDC, IL=1A, ZL<=200mH
On-state resistance VDD to OUT:
RON<=180 mOhm
Turn-on time: tON<=250 µs
Turn-off time: tOFF<=270 µs
PWM output OUT9 Output type: solid state (lowside)
IOUT <= 2 A (resistive load)
@ fOUT = 1 kHz to 10 kHz
IOUT <= 1 A (resistive load)
Potential isolation no
7.1.5 MODBUS interface
MODBUS Protokol: RTU
Baud: 1.200, 2.400, 4.800, 9.600,
19.200, 38.400, 56.000 Kbit
Parity: no, Stopbit: 1
exibly graphically congurable
data format
Meets or exceeds the require-
ments of ANSI Standards TIA/
EIA-422-B and TIA/EIA-485-A
and ITU Recommendations V.11
and X.27
No termination resistor integrated
7.1.6 Security features
Security Features Watchdog (WD)
Fail safe oscillator 16 MHz (FSO)
Brown out detection (BOD)
Power up timer (PUT)
7.1.7 Program and data memory
Flash program memory 64 k
cell endurance: 10.000 min
characteristic retention: 40 yrs
EEPROM data memory 1024 byte
byte endurance 100.000 min.
characteristic retention: 40 yrs

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Art. No. 0850-0680
MANUAL
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® BARTH is a registered trademark. All rights reserved. 9021-0016-A
7.1.8 Timebase (oscillator)
Primary Oscillator Crystal quartz MEMS unit
(precise ‚micro-electro-mecha-
nical system‘)
Nominal Frequency 16.000 MHz
Frequency tolerance ±50 × 10-6
Frequency aging ±5 × 10-6 / year max.
Second Fail Safe Oscillator 16 MHz
7.1.9 Electrical connection
Electrical Connection plugable spring terminal
connectors 0.25 to 1.5 mm²
Manufacturer: Phoenix Contact
Series: COMBICON
Type: FMC1,5/x-ST-3,5
7.1.10 Electromagnetic compatibility (EMC)
Electrostatic discharge
(ESD) on IN1 to IN10
20 kV air discharge
30 kV contact discharge
(IEC/EN 61 000-4-2, level 3)
Electrostatic discharge
(ESD) on OUT1 to OUT8
8 kV (human body model)
(MIL-STD883D)
Electromagnetic elds Field strength 10 V/m
(IEC/EN 61000-4-3)
7.1.11 Environmental conditions
Operation temperature -40..+60 °C
(IEC 60068-2-1/2)
Storage temperature -40..+70 °C
(IEC 60068-2-1/2)
Relative humidity 5 to 95% non-condensing
(IEC 60068-2-30)
Air pressure (in operation) 500 to 1500 hPa
Shock resistance min. 100 m/s²
(IEC 60068-2-27)
Vibration resistance min. 50 m/s² @ 10..150 Hz
(IEC 60068-2-6)
Degree of protection IP 20, limited by connectors
(EN 50178, IEC 60529)
Drop Drop height: 500mm
(IEC 60068-2-31)
Free fall (packaged) 1500 mm
(IEC 60068-2-32)
7.1.12 Weight and dimensions
Weight 80 g
(without connectors)
Dimensions 93 x 45 x 15 mm (LxWxH)
Mounting via two M4 screws or 3.6mm
cable ties
7.1.13 Ordering information
Ordering information
Mini-PLC
Mini-PLC STG-680
Art. No. 0850-0680
GTIN 4251329400149
Ordering information
accessory
USB connection cable VK-16
Art. No. 0091-0016
GTIN 4251329400187
7.2 Documents, videos and software
Detailed information, additional documents, application
notes and videos relating to this product are downloadable
from www.barth-elektronik.de and www.micon-l.de
7.3 Disposal
If you wish to nally dispose of the
product, ask your local recycling centre
or dealer for details about how to do
this in accordance with the applicable
disposal regulations.
7.4 Conformity declaration
For the following designated product it is hereby conrmed,
that the construction in that technical design brought by us
in trafc corresponds to the standards specied below. In
the event of any alternation which has not been approved
by us being made to any device as designated below, this
statement shall thereby be made invalid.
Description Mini-PLC
Type STG-680
Art. No. 0850-0680
Directive
2004/108/EG relating to-
electromagnetic
compatibility (EMC)
Applied norms:
2004/108/EG
2004/108/EC
2014/30/EU
RoHS Directive
2011/65EU
We herby declare that our
product is compilant to the RoHS
Directive on restriction of the use
of certain hazardous substances
in electrical and electronic appli-
ances.
BARTH®Elektronik GmbH
Lengerich, 03.08.2016
Dipl.-Ing. (FH) D. Barth
Managing Director