BAR H
Elektronik GmbH
®
4/8
9021-0016-A
04.08.2016
A
Page:
Document:
Date:
Revision:
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
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 specifi-
cation of the outputs.
5.2.5 Connecting the MODBUS interface
The X1 connector of the STG-680 contains the MODBUS-
specific 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 specifi-
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
specifications 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, flow, 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 specification of the inputs.