EHS O2 Kompmaster Bedienungsanleitung
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
O2- Kompmaster
Composting Control Unit
In cooperation with:
© EHS Engineering Hard- + Software 2003
O2- Kompmaster
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
Table of Contents
1 INTRODUCTION...........................................................................................................................1
2 DESCRIPTION...............................................................................................................................1
3 CONNECTION CONFIGURATION............................................................................................2
3.1 SUPPLY PIN CONFIGURATION ........................................................................................................ 3
3.2 CONTROL OUTPUT PIN CONFIGURATION ....................................................................................... 3
3.3 INPUTS .......................................................................................................................................... 4
3.4 OUTPUTS....................................................................................................................................... 4
4 INTERFACES.................................................................................................................................4
5 INDICATOR LAMPS ....................................................................................................................5
5.1 INTERNAL INDICATORS ................................................................................................................. 6
5.2 EXTERNAL INDICATOR .................................................................................................................. 7
6 REPLACING THE FUSE ..............................................................................................................7
7 SETTING THE ADDRESS............................................................................................................9
8 DATA STORAGE.........................................................................................................................10
9 NOTES...........................................................................................................................................12
10 TECHNICAL SPECIFICATIONS..............................................................................................13
O2- Kompmaster
Page 1
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
1 Introduction
The “Kompmaster” compostingcontrol unit from EHS is designed to control and log
the compostingprocess bymeans of connected temperature and oxygen measuringsen-
sors. Onlymeasuringsensors authorized byEHS for operation with the compostingcon-
trol unit must be connected to the control unit.
An integrated and buffered memoryrecords and stores the data relevant to the assess-
ment of the compostingprocess, until theyare read and saved, which can be done using
the “Kompmaster” software for PCs provided.
It is recommended that you download the data in regular intervals and that you generate
and archive backup copies of your data.
2 Description
The “Kompmaster” control unit is used to control the compost decomposition and to log
the temperature values and the oxygen content. The control unit is designed for both
stand-alone and networked operation with maximum 32 control units.
In stand-alone operation, the connection to the control PC is achieved bymeans of an
RS232 interface which allows the use of anystandard computer.
In networked operation,the connection to the control PC is achieved bymeans of an
RS485 interface,which requires the use of correspondinginterface converters.
With the PC software provided it is possible to monitor the compostingprocess during
runningoperation, allowingcontrol of the compostingprocess at anytime. With the
help of the PC software you can also configure the settings and carryout the setup of the
compostingcontrol units connected.
For a detailed description of the software, please see the manual provided. In stand-
alone operation, onlythe control unit connected to the PC at the time (which must be
reinitialized after connecting) is visible in the PC software, and its measured values are
displayed.
In networked operation, the current measured values of all connected and active control
units are displayed on the PC. The settings and the control unit setup required can also
be carried out directlyfor all active control units usingthe PC software.
Once theyare initialized, both units work “stand-alone” without the PC. The PC is only
required for programmingand to archive and evaluate the data.
O2- Kompmaster
Page 2
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
3 Connector Configuration
The connectors on the side of the control unit are configured as follows.
Figure 1: Connector Configuration
(1) Temperature sensor
(2) Oxygen sensor
(3) RS485 connection 1
(4) RS485 connection 2
(5) 24V supply
(6) Control output
Please observe the configuration. Wrong connections can result in damage to the
control unit.
O2- Kompmaster
Page 3
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
3.1 SupplyPin Configuration
Figure 2: SupplyPin Configuration
Pin 1 +24V (controlled DC)
Pin 2 Power supplyground
Important:
The protective earth must be connected via the cable shield to the control unit.
3.2 Control Output Pin Configuration
Figure 3: Control Output Pin Configuration
Pin 1 K1
Pin 2 K2
In switched state K1 and K2 are electricallyconnected.
O2- Kompmaster
Page 4
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
3.3 Inputs
The input signals of the temperature sensors and the oxygen sensor are processed as ana-
logcurrents of 4 to 20 mA. The inputs are momentarilyprotected against over-voltage
and electrical interference.
For details please see the “Technical Specifications” table.
Onlyconnect measuringsensors authorized byEHS.
3.4 Outputs
The control output is designed as a potential-free make contact with a maximum load of
30 V and 1 A. The control output is used in the system to operate a relay(usually24V
relay) which again controls the fan.
Switch “open” = Signal blocked
Switch “closed” = Signal switched
Direct control of bigger loads than specified, e.g. a fan with higher voltages and currents
is prohibited and will damage the control unit.
The device is exclusively designed for low voltage. Non-observance of this specifi-
cation makes any warranty claimnull and void.
4 Interfaces
The are two control unit variations with different interfaces to the control PC.
(1) RS232/V24 “Stand-alone“ operation
Units which will not be networked are equipped with this interface. When oper-
atingseveral controls, you must connect them to the PC alternatelyto configure
the control or download the data.
The specification of the RS232/V24 interface in hardware and software complies
with the usual PC standard.
(2) In networked operation via RS485, up to 32 units can be operated at one PC in-
terface. Since this is not a standard PC interface, suitable converters must be
used. The RS485 interface is operated in 4-wire full-duplexmode, with each unit
havingits own network address which is set bymeans of micro-switches inside
the control unit. The control units are connected to each other and to the inter-
face converter usinga four-wire line. The wiringdiagram is as follows:
PC Komp-
master
TxD
RxD
O2- Kompmaster
Page 5
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
Usingthis method a distance of max. 200 m is permitted, addingup the lengths of all
cables from the converter to the last control unit in the network. For larger distances the
use of fiber optics is recommended, alternativelysignal amplifiers for the RS485 bus
can be used..
When usingfiber optics, the individual units are connected to each other up to the
RS485/fiber optics converter usingcables. The transfer to the remote office buildingis
carried out bymeans of fiber optics and re-convertingto RS485 or—if connectingdi-
rectlyto the PC—to RS232.
Settingthe network address is described in the “Settingthe Address” chapter.
5 Indicator Lamps
A total of four LEDs are used to indicate various parameters of the control unit.
Three of those indicators are internal and onlyvisible after openingthe housing.
Caution:
Before opening the housing, unplug the power supply to prevent short-circuits
inside the control unit!!!
With the LEDs, the correct operatingvoltage supplyof both the electronics and the sen-
sors can be checked. In addition, there is an indicator showingwhether the control unit
activelyparticipates in the data communication with a connected control computer.
The fourth indicator is integrated into the housingand indicates the proper function of
the control unit bycyclic flashing(1 second on/1 second off).
RS485 Komp-
master 1
Tx-
Tx+
Rx-
Rx+
Komp-
master 2
Komp-
master “n”
O2- Kompmaster
Page 6
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
5.1 Internal Indicators
The LEDS are located at the positions illustrated and are allocated as follows:
Figure 4: Placement on the PCB
1) Operatingvoltage indicator: This LED must light continuouslyand indicates that
the internal supplyof the control unit is correct.
2) Communication indicator: This LED lights up momentarilywhen the control
sends data to the control computer at the control computer’s request.
3) This LED indicates whether the sensor supplyis applied correctly. This LED
must light continuously. If it does not light, the fuse of the sensor supplyhas
blown. In this case you must replace the fuse as described in the “Replacingthe
Fuse” chapter.
Figure 5: Layout ofthe LEDs
O2- Kompmaster
Page 7
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
5.2 External Indicator
The LED integrated in the front side indicates the correct function of the control unit by
cyclic flashing(1 second on/1 second off). This ensures that the supplyvoltage is ap-
plied correctlyand that the logic of the control unit operates correctly.
If you suspect a fault in the control unit, first check this operation indicator before open-
ingthe housingfor further fault localization.
Figure 6: External Operating Indicator
6 Replacing the Fuse
If the sensor supplyis not applied correctly, there is a high probabilitythat the fuse has
blown. To make the system operational again you must replace the fuse.
Before replacing the fuse, the cause for the fault must be located and eliminated.
You must check all connectors and cables to the sensors, both temperature and oxygen
sensors, and repair them if necessarybefore replacingthe fuse. A permanent short-
circuit can damage the control unit.
Before replacingthe fuse, please pull the connectors of the sensors out of the control
unit.
Caution:
Before opening the housing, unplug the power supply to prevent short-circuits
inside the control unit!!!
O2- Kompmaster
Page 8
All rights reserved. Maynot be photocopied or stored on a retrieval system without the prior written permission ofEHS.
Onlyfor use in conjunction with an Aerotronic control unit. © EHS- Engineering 2003
For more information, see http://www.komposttechnik.de
Figure 7: Position ofthe Fuse Holder
To replace the fuse:
- Open the fuse holder with a large screwdriver bycarefullyturningit anti clockwise
until the cap is undone.
- Then pull out the fuse byremovingthe cap.
- Check whether the fuse reallyis damaged and replace it with a new fuse, if
necessary. For the technical specifications of the fuse please see the “Technical
Specifications” chapter.
- Close the fuse holder byrefittingthe cap and carefullyturningit clockwise with the
screwdriver until it snaps in securely.
- Now check the operatingvoltage indicator of the sensor supply. The corresponding
LED (see “OperatingIndicators” chapter) must be on.
- If this is the case, at first connect onlyone sensor to the control unit and check
whether the operatingvoltage indicator is still on or whether the fuse has blown
again.
- If the fuse has blown again, the sensor is defective and must be replaced.
- Carryout the last two steps for the second sensor.
- If, after connectingboth sensors, the operatingvoltage indicator lights up
continuously, the system is operational again.
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