MSA 9010 LCD User manual

Operating Manual
CONTROL UNIT
MODELS 9010 and 9020 LCD
Order No. 10093590/02

MSA AUER GmbH
Thiemannstrasse 1
D-12059 Berlin
Germany
© MSA AUER GmbH. All rights reserved

MSA AUER
MSA
Declaration of Conformity
Control Unit Models 9010 LCD and 9020 LCD 3
GB
Declaration of Conformity
The manufacturer or his in the community established authorized representative
MSA AUER GmbH
Thiemannstraße 1
D-12059 Berlin
declares that the product:
CONTROL UNIT 9010 and 9020 LCD
based on the EC-Type Examination Certificate:
INERIS 00 ATEX 0028 X
Standards: EN 60079-29-1 :2007, EN 50104 :2010
EN 50271:2010, EN 50 402 :2009
EN 45544-1 :1999, EN 45544-2 :1999
complies with the ATEX directive 94/9/EC, Annex III. Quality Assurance Notification complying with
Annex IV of the ATEX Directive 94/9/EC has been issued by Ineris of France, Notified Body number:
0080
The product is in conformance with the directive 2004/108/EC, (EMC):
EN 50270 :2006 Type 2, EN 61000- 6- 4 :2007
The product is in conformance with the directive 2006/95/EC (LVD):
EN 61010-1 :2010
MSA AUER GmbH
Dr. Axel Schubert
R&D Instruments
Berlin, September 2013

Control Unit Models 9010 LCD and 9020 LCD
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Contents MSA
GB
Contents
1 Safety Regulations ...................................................................................................................... 6
1.1 Correct Use .......................................................................................................................... 6
1.2 Liability Information .............................................................................................................. 6
2 Overview of the different types ................................................................................................... 7
3 General Information ..................................................................................................................... 8
3.1 Technical characteristics of the control module ................................................................... 8
3.2 Guide for using the manual ..................................................................................................9
3.3 General Description ............................................................................................................. 9
4 Installation .................................................................................................................................. 11
4.1 Mechanical installation ....................................................................................................... 11
4.2 Electrical installation ........................................................................................................... 11
5 Configuration .............................................................................................................................. 14
5.1 Control Unit Configurations ................................................................................................ 14
5.2 Front Panel ......................................................................................................................... 14
5.3 Configuration with relay outputs ......................................................................................... 15
5.4 Configuration with opto-isolated outputs ............................................................................ 15
5.5 Predisposed for input signal ............................................................................................... 16
5.6 Output Signals .................................................................................................................... 16
5.7 Failure function ................................................................................................................... 17
5.8 Alarms and overrange functions ........................................................................................ 17
5.9 Starting the Control Unit ..................................................................................................... 18
5.10 Jumpers predisposition ...................................................................................................... 19
6 Setting Parameters ..................................................................................................................... 23
6.1 Use of the buttons for access to the codes ........................................................................ 23
6.2 Access Code 1 - Calibration operations ............................................................................. 26
6.3 Access code 2 - Settings for particular operating conditions ............................................. 27
6.4 Access code 3 - Simulation and functionality operations ................................................... 28
6.5 Access code 4 - Configuration operations ......................................................................... 29
6.6 Access code 7 - Setting the address of the peripherals ..................................................... 31
6.7 Access code 52 - Initialisation operations .......................................................................... 31
6.8 Access Code 53 - Default settings ..................................................................................... 32
6.9 Access code 123 - Acceptance of protecting access codes [n° 2; 4; 7; 52; 53] ................. 33
6.10 Operations for the setting, the use and the modification of the password ......................... 34
7 Calibration Procedures .............................................................................................................. 35
7.1 Calibrations ........................................................................................................................ 35
8 Maintenance ................................................................................................................................ 37

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Contents
Control Unit Models 9010 LCD and 9020 LCD 5
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9 Failure and Error messages ...................................................................................................... 38
9.1 Failure indications .............................................................................................................. 38
9.2 Error indications ................................................................................................................. 38
10 Marking, Certificates and Approvals According to the Directive 94/9/EC [ATEX] .............. 39
11 Ordering Information ................................................................................................................. 40
12 Appendix ..................................................................................................................................... 41
12.1 Appendix 1- ISA sequence - Reset modes ........................................................................ 41
12.2 Appendix 2 ......................................................................................................................... 44
12.3 Appendix 3 ......................................................................................................................... 45
12.4 Appendix 4 ......................................................................................................................... 46
12.5 Appendix 5 Description of Control Unit 9020-4 .................................................................. 82

Control Unit Models 9010 LCD and 9020 LCD
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Safety Regulations MSA
GB
1 Safety Regulations
1.1 Correct Use
The Control Unit Models 9010 LCD and 9020 LCD [hereinafter referred to as control unit] is par-
ticularly intended to detect the presence of gas and specific vapours in accordance with the data
provided by the User to the Manufacturer. In no case can it be used for other functions. The op-
erators must be perfectly aware of the actions to undertake if the concentration of gas should ex-
ceed the alarm set-points.
It is imperative that this operating manual be read and observed when using the control unit. In
particular, the safety instructions, as well as the information for the use and operation of the de-
vice, must be carefully read and observed. Furthermore, the national regulations applicable in the
user's country must be taken into account for a safe use.
Alternative use, or use outside these specifications will be considered as non-compliance. This
also applies especially to unauthorised alterations to the apparatus and to commissioning work
that has not been carried out by MSA or authorised persons.
1.2 Liability Information
MSA accepts no liability in cases where the product has been used inappropriately or not as in-
tended. The selection and use of the product are the exclusive responsibility of the individual op-
erator.
Product liability claims, warranties also as guarantees made by MSA with respect to the product
are voided, if it is not used, serviced or maintained in accordance with the instructions in this man-
ual.
Warning!
In the case of operation with catalytic combustion sensors: To guarantee the unambigu-
ity of catalytic combustion sensor operation it must be made sure [e.g. by checking with
hand-held test instruments] each time before turning on the sensors and the system that
the environmental atmosphere to be monitored by the sensors is free of combustible
gases.
Danger!
This product is supporting life and health. Inappropriate use, maintenance or servicing
may affect the function of the device and thereby seriously compromise the user’s life.
Before use the product operability must be verified. The product must not be used, if the
function test is unsuccessful, it is damaged, a competent servicing/maintenance has not
been made, genuine MSA spare parts have not been used.

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Overview of the different types
Control Unit Models 9010 LCD and 9020 LCD 7
GB
2 Overview of the different types
Fig. 1 9010 rack board version Fig. 2 9020 rack board version
Fig. 3 9010 wall mount version Fig. 4 9020 wall mount version
Fig. 5 9020-4 wall mount version Fig. 6 9010/20 wall mount version in ABS
container
Fig. 7 9010/20 LCD in anti-deflagration container
for installation in a dangerous area

Control Unit Models 9010 LCD and 9020 LCD
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General Information MSA
GB
3 General Information
3.1 Technical characteristics of the control module
Electrical power supply 115/230 VAC ± 15% 50/60 Hz
24 VDC +15% -20%
No-load consumption Model 9010 Model 9020
AC power supply with 24 VAC 13 VAC 15 VAC
Power supply in dc of 24 VDC 3 W 4 W
Sensors/transmitters power supply
Constant current 5500 mA 5500 mA
Constant voltage 324 VDC 324 VDC
Connection mode of the sensors/transmitters 2, 3 and 4 conductors
Terminal board for conductors up to 2.5 sq. mm
Input signals 10200 mV DC
420 mA
Analogue output signals
In regular operation 020 / 420 mA [selectable]
In non-regular operation 0 / 2 / 4 / 20 mA / frozen [selectable]
Signal isolated to ground
Serial interface RS485 Half duplex with dedicated
protocol Mod-Bus RTU
Alarm Set points No. 3
[CAUTION - WARNING - ALARM]
Electrical characteristics related to the
remote repetition of the alarms
Via relay contacts 5A@ 24 VDC / 250 VAC,
resistive load
Via common collector/emitter opto-isolators 30 mA, 24 VDC max, resistive load
Failure and negative drift indication
Via relay common to the two channels with model 9020
Via individual opto-isolators for each channel
Alarm management
Reset mode 1 or 2 - automatic or manual
Activation delay 09999 seconds
Automatic blocking Within the Access Codes
Manual blocking Via the related Access Code
Response speed [without sensor] < 0.5 sec. for the 100 % f.s.
Zero and span drift [without sensor] < ±0.5 % f.s. ±1 digit/month
Precision [without sensor] ±1 % f.s. ±1 digit
Operating temperature -10 °C +50 °C
Storage temperature -20 °C +75 °C
Humidity 90 % RH non condensing
Vibration 10 55 Hz; 0.15 mm

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General Information
Control Unit Models 9010 LCD and 9020 LCD 9
GB
3.2 Guide for using the manual
Reading and understanding this Instruction manual enables the proper management of the
Control Unit 9010/20 LCD.
The control units are normally furnished already predisposed in operation, configured and calibrat-
ed by MSA in relation to the sensor/transmitter that will be connected and in conformity with the
specific needs of the end User. In this case, it is recommended to take a look at the Calibration
Data Sheet attached to the Control Unit in order to verify the effective correspondence of the data
to the real needs.
In the event that the Control Units are not predisposed to satisfy the specific requirements of the
User, consult our technical support department or make the modifications to the Control Unit re-
lated to the defects discovered only after having read and understand the Instruction Manual. The
personnel that makes the modifications will have to be adequately prepared and aware of the
modifications that they will make.
The Technical Support Department of MSA is at the disposal of the customers in order to
supply information and clarifications.
3.3 General Description
The function of the Control Unit 9010/20 LCD designed and built with SMD parts for the purpose
of improving performance and reliability and managing many types of sensors and transmitters
that are suitable, in the most frequent applications, for monitoring the limits of flammability and
ambient toxicity of gases and vapours as well as for the measure of the oxygen in order to an-
nounce the possible deficiency.
In the planned cases, the Control Unit is configured in order to satisfy directive 94/9 EC,
better known as the ATEX directive. For different needs it is possible to configure it to
satisfy the particular specifications of the analysis systems.
The Control Units 9010/20 LCD enable the management, respectively, of one or two sensors/
transmitters [single or double channel].
Depending on the function of the applications, the sensors/transmitters can be connected via 2,
3 or 4 conductors.
Normally, beyond managing the input signal by current or voltage, the Control Units provide for
feeding every sensor/transmitter by current or voltage.
Display back-lit LCD
4 digit; 7 segments
Pilot lights High luminosity LED's
Warm-up and display time 60 sec./channel
Time-out function 2 6 min.
Default and configuration data Memorised in EEPROM
Protections
AC/DC commutation because of absent mains voltage Automatic electronics
Protections from accidental tampering via Access Code and password
Watchdog and checksum electronic
diagnostics
A/D converter
For controls 16 bit ± 1 - 25 °C with
4 multiplexed inputs
For analogue signal 16 bit ±1 - 25 °C with
2 multiplexed signals
Dimensions of the front panel 3 U x 8 T. E
Weight 720 g
Electrical installation category II

Control Unit Models 9010 LCD and 9020 LCD
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General Information MSA
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The Control Units have a display [LCD], backlit for each channel.
Moreover, any time an alarm set-point is exceeded, this is indicated by other pilot lights.
Three alarm set-points are available for each channel with the designations C [Caution],
W [Warning] and A [Alarm], it is possible to use an additional indication of Overrange if the full
scale value is exceeded [the display shows EEEE].
The indications of output alarms, which can be transmitted remotely, can be realised via relay con-
tacts, de-energised, or via opto-isolators, depending on the configuration modalities of the
Control Unit.
Passwords and access codes for the various functions prevent accidental or unwanted tampering;
specific messages on the display inform and identify any operational anomalies and any errone-
ous data setting.
The following analogue output signals can be selected as desired with the possibility of also ef-
fecting their linearisation: 0 *20 mA, 4 *20 mA, 20*0 mA, 20*4 mA. Moreover, an interactive serial
interface RS485 is available.
The board is available in four versions:
The 9010/20 LCD boards offer numerous installation solutions for rack mounting, wall mounting
in ABS containers or in anti-deflagration containers for dangerous zones.
The control modules connected to sensors or transmitters that operate in potentially
hazardous zones for detecting combustible gases or oxygen will be configured according
to the operational modalities provided by the ATEX Directive.
board 9010 LCD with one channel for inputs dedicated to the single two or three wire
4/20 mA transmitters
board 9020 LCD with two channels for inputs dedicated to the single two or three wire
4/20 mA transmitters
board 9010 LCD with one channel for general purpose inputs [passive sensors, transmitters,
semiconductors, etc.]
board 9020 LCD with two channels for general purpose inputs [passive sensors, transmitters,
semiconductors, etc.]

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MSA
Installation
Control Unit Models 9010 LCD and 9020 LCD 11
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4 Installation
4.1 Mechanical installation
The control units 9010/20 LCD are constructed to be installed in various configurations; versions
are available for mounting in 3HE racks, in wall-mount versions in one- or two-point ABS contain-
ers or 4-point metal containers or in ADPE containers for installations in hazardous zones; custom
solutions can be implemented by customer request.
A correct installation must avoid environments that are particularly humid, oxidising, corrosive,
subject to notable vibrations or in which the excursions of temperature exceed the limits indicated
in the TECHNICAL CHARACTERISTICS section.
In the cases in which the installation is planned in cabinets, heed the prevailing standards that
govern the maximum permissible temperature inside these same cabinets, in any case the instal-
lation of the racks in the cabinets must be carried out in such a way as not to impede the natural
ventilation of the various electronic components of the boards.
It is helpful is there is adequate space between one rack and another.
Sufficient space needs to be left at the back of the rack to allow for correct connection of the con-
ductors to the back terminal boards.
The dimensions of the containers and the weights are recorded in the diagrams and drawings sec-
tion.
4.2 Electrical installation
Make the various electrical connections [power supply, sensors, alarms, etc.] to the back terminal
of the Control Unit consulting the specific EXTERNAL CONNECTIONS DIAGRAM with relay or
opto-isolated output.
Use electrical conductors suitable for the power values recorded in the
TECHNICAL CHARACTERISTICS; the rack, in the rear part, is equipped with two bars for affixing
and supporting the cables connected to the back terminal boards of the Control Unit.
Power supply from electrical mains
The Control Units 9010/20 LCD can be fed in alternating current from the electrical mains at a
voltage of 115 VAC ±15 % or 230 VAC ±15 % depending on the predisposition represented be-
low, which is carried out using the appropriate selector.
Attention!
The electrical installation needs to be carried out by qualified personnel in compliance
with the prevailing standards, especially in areas where there is an explosion and fire
hazard.
TRANSFORMER TRANSFORMER
Fig. 8 Power Supply 230 VAC Fig. 9 Power Supply 115 VAC
230
115

Control Unit Models 9010 LCD and 9020 LCD
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Installation MSA
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Check the ELECTRICAL CONNECTIONS DIAGRAM in order to identify the line connection ter-
minals L, N and EARTH. The Control Unit 9010/20 LCD is protected on the supply line by fuse F1
whose value is determined by the feed voltage, and in particular:
Fuse F1 - 250 mA for 230 VAC supply
Fuse F1 - 500 mA for 115 VAC supply
The electrical supply must not present variations in voltage greater than those indicated, sudden
flickers of voltage due to the connection of electrical loads of substantial magnitude, electrical dis-
turbances caused by inductive and capacitive loads and incorrect contacts.
MSA shall not be held liable for malfunctions and/or damage caused by electrical disturbances
that are due to natural phenomena [e.g. lightning strikes].
We recommend protecting the equipment using appropriate external switches [automatic switch-
es, differential switches] as close as possible to the equipment; the switches should be identified
by their function and should conform to the standards IEC 60947-1 and IEC 60947-3.
The 9010/20 LCD boards were tested and developed in compliance with the EMC directives and
the prevailing standards EMC [EN 50270]. In order to guarantee conformity with the EMC
standards, several rules need to be observed during the installation phase:
-Provide an earth connection or an equipotential connection without defects.
-Use an external energy source conforming to the EMC directives, use split EMC mains filters
for AC voltage feeds [115/230] and/or DC voltage feeds [24].
-Use diagrammed cables for DC supply [24 VDC] and for the sensors/transmitters, also the
control cables [reset, output 4/20 mA, RS485] need to be shielded.
-Use cables diagrammed with a minimum shielding of 80%, avoid junctions, use boxes of the
shielded type.
-Keep the signal cables separate from the supply cables, with a distance of at least 30 cm.
-External devices used [horns, flashers, motors, etc.] must by shielded from the radio frequen-
cies and conform to the EMC directives.
-Avoid installations in areas with a presence of strong electromagnetic fields.
DC power supply
Predisposition for 24 VDC power supply from external sources
The appropriately configured Control Units 9010/20 LCD can be supplied with either AC or DC
current. If both of the feeds are present, the DC current automatically takes over for AC when the
latter is lacking and vice-versa, without any discontinuity in operation.
Make the DC connections at terminals 4 [+] and 5 [-] of the back terminal board following the
polarity indicated on the CONNECTION DIAGRAM.
When the Control Units are connected with external battery backups, make sure that the voltage
remains within the values recorded in the TECHNICAL CHARACTERISTICS; the board is
equipped with appropriate indications for power outage at the mains or battery.
For 24 VDC power supplies from external sources [e.g.: battery backup, power supply modules,
etc.] the CV-18 Control Unit jumper needs to be predisposed in pos. 2-3 on terminals 4 and 5 as
represented below.
This input is protected by 2-amp fuse F3.
Attention!
Control Unit 9010/20 LCD is not predisposed for battery backup charging; this function
needs to be implemented by external devices.

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Installation
Control Unit Models 9010 LCD and 9020 LCD 13
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Predisposition for supplying auxiliary external circuits via the Control Unit
In the cases in which direct current is not available and makes it necessary to supply the auxiliary
circuits external to the Control Unit [e.g. relays, interfaces, transmitters, etc.], it is possible to pro-
vide 24 VDC at the heads of the terminals 4 [+] e 5 [-] predisposing jumper CV18 in position 1-2.
The maximum power that can be connected depended on the transformer mounted on the
Control Unit and on the sensors/transmitters used. This exit is protected by a 2-amp fuse F3.
For any technical problem, please contact the MSA Technical Support Department.
Sensor or transmitter connections
In the cases in which the Control Units are supplied in a pre-calibrated state for the required gas,
it is necessary for each sensor, identified by a serial number, to be connected to the Control Unit
or to the channel [A or B in the case of model 9020] which records the same number.
When the Control Units are connected to transmitters 4/20 mA, they can be freely connected with
respect to the particular configurations.
The connection of the sensor to the Control Unit must be carried out, unless there are different
instructions on the part of MSA, via shielded cable.
The number of conductors necessary for the connection of the sensor, planned during configura-
tion, is indicated on the CALIBRATION DATA SHEET attached to the Instruction Manual while, in
order to know the minimum section that must be used, depending on the current consumed by the
sensor and on the length of the line, consult the diagrams attached to the manual.
The shielding of the connection cable to the sensor must be uniquely connected to the
screw or to the faston earth terminal adjacent to the back terminal board for connection of
the Control Unit, it is important that the shielding from the sensor side be carefully isolated
and absolutely not be connected to the earthing screw that is located inside the sensor
case. The case must be connected to earth via a different conductor to be fixed to the
screw predisposed on the outside of the box.
If it were necessary to employ more lengths of cable between the Control Unit and sensor, it is
necessary to make the joints via welds; it is a good rule of thumb to make welds also on the wire
terminals.
TRANSFORMER TRANSFORMER
Fig. 10 24 VDC Power Supply from internal source Fig. 11 24 VDC Power Supply from external source
F3
CV18
3
2
1
CV18
F3
3
2
1
Warning!
In the case of operation with catalytic combustion sensors: To guarantee the unambigu-
ity of catalytic combustion sensor operation it must be made sure [e.g. by checking with
hand-held test instruments] each time before turning on the sensors and the system that
the environmental atmosphere to be monitored by the sensors is free of combustible
gases.

Control Unit Models 9010 LCD and 9020 LCD
14
Configuration MSA
GB
5 Configuration
5.1 Control Unit Configurations
The board was designed and certified to satisfy Directive 94/9CE, better known as
ATEX Directive, in order to be suitable for monitoring gas and/or flammable vapours in the field
of the Lower Limit of Explosiveness [LIE] and in order to detect the deficiency or enrichment of
oxygen.
The directive imposes some functional links of the Control Unit with the aim of guaranteeing the
safety of the monitored area and therefore of the persons that operate it.
When jumper CV23 is done, the board operates in ATEX mode [default configuration].
In this case, the functioning of the Control Unit turns out to be very rigid and some modes of op-
eration, available when the board is used for other aims, cannot be set.
IMPORTANT
With the functioning mode according to the ATEX Directive, particular importance is attributed to
the FAILURE function that, via the relative opto-isolator or relay, signals any out-of-service condi-
tion of the Control Unit, even if not attributable to a failure.
This prerogative, resulting from an exasperated operating condition as a function of safety, must
be kept in the debit account by the Designers of the installations monitored via the Control Unit if,
resulting from the FAILURE condition, is made to correspond to an important action in the opera-
tion of the installations themselves.
Among the situations that provoke the FAILURE condition, the following should be remembered:
-Entry in any of the Access Codes.
-Blocking of the alarms
5.2 Front Panel
Located on the front panel are:
-4-digit back-lit LCD display [no. 2 in the case of model 9020]. On the display, beyond the value
of the concentration, different information is available, such as the engineering unit, delay
alarms, their possible blocking, the calibration and TIME OUT states, as well as the symbols
of reference to possible conditions of operational irregularity.
-3 LED [C; W, A] for the optical indication of reaching the alarm levels.
-LED [F] for the optical indication of a possible failure or out-of-service condition.
-Pockets suitable for containing the identification of the type of gas that is monitored.
-3 buttons, as represented below, to enable all of the operations necessary for managing the
Control Unit.
Enter key used in order to select the access codes and confirm the settings
of the data.
A green LED is inserted in the button that signals by continuous light that the
device is turned on and by flashing light the entry of an access code.
UP key for increasing the data to be modified in the access codes or for si-
lencing and resetting the alarms
Down key for decreasing the data to be modified in the access codes or for
silencing and resetting the alarms

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Configuration
Control Unit Models 9010 LCD and 9020 LCD 15
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5.3 Configuration with relay outputs
The Control Units 9010 and 9020 are furnished with 4 indication relays, respectively, alarm, warn-
ing, failure and horn, while the caution output is normally opto-isolated [default configuration] at
which reference is made to the EXTERNAL CONNECTIONS DIAGRAM for the back terminal
board connections.
The use of the voltage-free contacts must be done in accordance with the electrical characteristics
of the contacts themselves recorded in the TECHNICAL CHARACTERISTICS. The relays used
are single exchange [SPDT] for the Alarm and Warning outputs, while only the contact [SPST] is
available for the Horn and Failure outputs.
The failure relay mounted on the board is a double exchange relay with the contacts in series in
order to satisfy the safety needs of the ATEX directive.
The board with the relay outputs provides the following predispositions:
-Relays installed and alarm configuration in access code 4
-Configuration via step 1 of access code 52: indication 1
-If utilised, the opto-isolated CAUTION in absence of the 24 VDC external power supply: CV22
in position 2-3 a CV18 in position 1-2.
5.4 Configuration with opto-isolated outputs
In substitution for the relays, all of the outputs related to the alarm set-points [C, W and A], to the
indication of possible failures or of the out-of-service states predicted if the Control Unit operates
according to the ATEX Directive as well as to the activation of the possible external acoustic alarm
device can be predisposed with opto-isolated outputs.
These outputs are independent for each channel, even with model 9020, with the exception of the
output related to the activation of the external acoustic device [HORN].
Opto-isolated outputs are available with a common transmitter [MSA 173 card] or common collec-
tor [MSA 174 card].
The electrical characteristics of the opto-isolators are recorded in the TECHNICAL CHARACTER-
ISTICS section while, for the connections, see the EXTERNAL CONNECTIONS DIAGRAM,
which provide the power supply of the opto-isolators and therefore of the relays via an internal or
external 24 VDC power source.
The 9010/20 LCD with the opto-isolated outputs provides the following predispositions:
-Remove the relays from the respective sockets, mount the circuit with the opto-isolators having
a common transmitter or collector depending on the application
-Configuration via step 1 of access code 52: indication 2
-In order to use the opto-isolators with the 24 VDC power supply supplied by the board, connect
the jumpers:
Cv18 pos. 1-2, Cv22 of the base board without any solder points in pos. 1-2 or 2-3
Cv1 pos. 2-3 on opto-isolator board
-In order to use the opto-isolators with the 24V dc power supply supplied by an external source,
connect the jumpers:
Cv18 pos. 2-3, Cv22 of the base board without any solder points in pos. 1-2 or 2-3
Cv1 pos. 1-2 on opto-isolator board
For applicable examples, see drawing E07-3497 attached.
On model 9020 LCD, the relay outputs are in common with the two channels.

Control Unit Models 9010 LCD and 9020 LCD
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Configuration MSA
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5.5 Predisposed for input signal
The Control Unit 9010/20 LCD general purpose version, depending on the sensor or transmitter
to be connected, can be configured to receive signals in mV or in mA, check table for the hardware
predisposition of the Control Unit.
The software predisposition is made in Access Code 52, step 3:
-setting datum 1 selects an input signal in mV [ex. catalytic sensors].
-setting datum 2 accepts a 4/20 mA input signal for two-wire transmitters
[ex. electrochemical sensors]
-setting datum 3 accepts a 4/20 input signal for three-wire transmitters
[ex. infrared detectors, field transmitters].
The Control Units configured by setting data 2, 3 are automatically calibrated between
4 and 20 mA and do not need further checks.
Control Unit 9010/20 LCD version 4/20 mA article no. 10093585 / 10093584 is predisposed to ac-
cept in inputs only signals 4/20 mA from 2- or 3-wire transmitters, the calibration is automatically
made on the 4/20 mA input signal.
5.6 Output Signals
Analogue signals
The selection of the analogue type signal, relative to the condition of regular operation, is per-
formed with Access Code 4, step 19.
0*20 mA, 4*20 mA, 20*0 mA and 20*4 mA signals are available.
The indication of the analogue type signal in the event of a failure is done with Access Code 4,
step 20.
The following signals are available: 0 mA, 2 mA, 4 mA, 20 mA or h [corresponding to the value of
the signal frozen at the moment of the failure].
It is possible to make corrections of the 4-20 mA analogue signal via steps 23 and 24 of access
code 4; in this way, the alignment with other purchased systems will be possible.
The behaviour of the analogue signal in correspondence to the various access codes is shown for
each of these.
RS485 signal
The serial output RS485, of the interactive type, can be utilised for the connection with Supervision
Systems, PLC, DCS, etc.
The data transmitted on a RS485 HALF DUPLEX type serial bus with MODBUS protocol, con-
nected to a Supervision System are as follows:
configuration of the current Control Unit with the possibility of modification, concentration values
of the monitored substance, alarm and failure conditions, execution of the horn cut-out and reset
of the alarm state.
Upon request it is possible to furnish output RS485 in a redundant form.
The MSA Technical Support Department is at your service for any technical questions.
Remember that these configurations are normally made in the factory in accordance
with the specifications of the customer.

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Configuration
Control Unit Models 9010 LCD and 9020 LCD 17
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5.7 Failure function
Beyond the red alarm LED's, the Control Units are equipped with a yellow LED [FAILURE] which
signals possible individual malfunctioning states [individual for each channel with 9020].
The nature of the failures, a listing of which is recorded in Section 9, is shown via the display.
The indication in a remote zone is accomplished via the related relay [FAILURE], which is
equipped with two free voltage-free N/O contacts [SPST] connected in series to each other in or-
der to guarantee the signalling.
In the ATEX version, the relay coil is normally energised.
With model 9020, the failure indication is common to the two channels when the indication
is predisposed with the relays or individual when predisposed with opto-isolated outputs.
A pre-existing alarm condition remains as such if the failure is subsequently detected,
while they are automatically blocked if the failure precedes the event that would have
caused it.
5.8 Alarms and overrange functions
Alarm Set points
The alarm set-points are designated as:
-Caution [C] caution level
-Warning [W] warning level
-Alarm [A] alarm level
-Overrange [EEEE] indication on the display of the full scale being exceeded
The exceeding of the alarm set-points will be displayed on the front panel via the red LED's and
causes the status of the opto-isolators and of the relays connected thereto to change.
The alarms can be configured via the various steps of Access Code 4, which, beyond setting the
intervention levels, enable the following choices:
-alarms for rising signals or falling ones.
-coils of the excited relays or unexcited ones in the non-alarm state.
-resetting of the manual alarm state, as per mode 1M or 2M, or automatic with mode 1A or 2A.
[see the attachment].
The horn cut-out and the manual reset of the alarms is carried out the same using the UP and
DOWN keys of the front panel or with the external pushbutton, possibly connected to the back ter-
minal board, see EXTERNAL CONNECTIONS DIAGRAM.
When the offset and full-scale values change, the Control Unit 9010/20 configures the sets
of alarms as default ones; the default values of the sets of alarms should be considered in
a percentage of the range of measure.
In a manner limited to the ATEX version, the alarm set-points A and W are set from 1 to 80 %
of full scale, while the alarm set-point C is set from 1 to 100 % of full scale; the indication
of overrange is always connected and the alarms are configurable only on the rise.
The oxygen analysis can also occur in ATEX mode [%Vol], with a full scale 0-25%Vol and
with alarms without setting; the input signal in ATEX mode must originate from a 4/20 mA
transmitter, likewise ATEX certified [e.g. MSA/AUER DF 9500 transmitter].
In the non-ATEX version, with the unit of measure PPM it is possible to set average alarms
on 15 min [STEL] and/or on 8 hours [TWA].
The value of the STEL average will be available after 15 minutes from start-up or after 15 minutes
from the STEL setting in Access Code 4, step 14 [and/or step 18]. The sampling time for the cal-
culation of the averages is 1 minute.

Control Unit Models 9010 LCD and 9020 LCD
18
Configuration MSA
GB
STEL average CALCULATION = sum of last 15 readings /15 [any negative values are consid-
ered 0 ppm].
The value of the TWA average will be available after 480 minutes [8 hours] from start-up or after
480 minutes from the setting. TWA in Access Code 4, step 14 [and/or step 18]. The sampling time
for the calculation of the averages is 1 minute.
TWA average CALCULATION = sum of last 480 readings /480 [any negative values are consid-
ered 0 ppm].
Overrange
The purpose of the OVER RANGE function is to indicate when 100 % of the full scale is exceeded,
and, if activated, this exceeding causes the symbol EEEE to be displayed and the external acous-
tic device to be activated, which can then be silenced by pressing one of the UP or DOWN keys.
In the ATEX version, the OVER RANGE indication is always activated.
The reset of all the alarm set-points is commutated automatically into 1M mode, independently of
the previously made choice, except that it is already in 2M mode.
The EEEE indication will persist until the signal remains greater than the full scale value.
When the signal falls back below the full scale, the EEEE symbol alternates with the current indi-
cation of the concentration [4 sec.: EEEE; 1 sec.: display of the concentration] and the acoustic
device is activated anew.
When the concentration falls back below the alarm levels and in concurrence with the manual re-
set of one or more set-points, the cancellation of EEEE occurs and the reset modes return as per
configuration.
If necessary, the CAUTION set-point, whose intervention value will be set to 100 % of full scale,
can be used for the remote indication of OVER RANGE.
5.9 Starting the Control Unit
Before energising the Control Unit, make sure that:
-the mechanical and electrical installation conforms to what is described in section 4 and nev-
ertheless conforms to the prevailing standards.
-that the setting of the jumpers related to the voltage change and those of the hardware config-
uration conform to the CALIBRATION DATA SHEET included with the Instruction Manual.
-that the serial number of the Control Unit corresponds to that of the sensor or of the connected
sensor.
After having applied voltage, the Control Unit for about 1 minute performs the self-diagnostics for
each channel in order to check the correct operation of the various circuits and of the signalling
devices.
During this phase, the alarms are blocked, and the 4/20 mA analogue output is placed as
per the configuration of Access Code 4, step 20; the failure indication for the ATEX version
is active.
At the end of the self-diagnostics, the Control Unit is placed in regular operating mode.

MSA AUER
MSA
Configuration
Control Unit Models 9010 LCD and 9020 LCD 19
GB
5.10 Jumpers predisposition
BASE BOARD - HARDWARE CONFIGURATIONS [normally performed in the factory]
The horn relay is normally unexcited with a normally open contact; if a normally closed contact is
desired, the track of CV 19, pos 2-3 needs to be cut and a drop of solder needs to be inserted in
pos.1-2.
Function Component side /
solder side NOTES
CV 13
AandB
pos. 1-2 RS485 redundant Drop of solder
[component side]
CV 13
AandB
pos. 2-3 Drop of solder
[component side]
Configurations
reserved for MSA -
default: closed
CV 14 pos. 1-2 Configurations re-
served for MSA - de-
fault: open
Cv 15 pos. 1-2 Open - gen. purp. board
Closed - 4/20 mA board
Drop of solder
[component side]
Depending on the
board
CV 16 pos. 1-2 Open - 38400 baud
Closed - 9600 baud
Drop of solder
[component side]
Default: open -
[x RS485]
CV 17 pos. 1-2 Drop of solder
[component side]
Configurations
reserved for MSA -
default: open
CV 18 pos. 1-2 24 VDC power supply
generated within board
Jumper, component
side
e.g. for services
CV 18 pos 2-3 24 VDC power supply
from outside board
Jumper, component
side
e.g. for battery
backup
Default
CV 19 pos. 1-2 Horn contact n.c. Drop of solder
[solder side]
Default: open
CV 19 pos. 2-3 Horn contact n.o. Drop of solder
[solder side]
Default: closed
CV 20 pos. 1-2 Drop of solder
[component side]
Configurations
reserved for MSA -
default: open
CV 22 pos. 1-2 Opto-isolated caution
output
Drop of solder
[component side]
Needs an external
negative on
terminal 7
CV 22 pos. 2-3 Opto-isolated caution
output
Drop of solder
[component side]
The negative is
common to the de-
fault board
CV 23 pos. 1-2 Closed - ATEX version
Open - non-ATEX
version
Drop of solder
[component side]
Default: closed
CV 24 pos. 1-2 Closed - UC 9010
Open - UC 9020
Drop of solder
[component side]
CV 25 pos. 1-2 Watch-dog activation Jumper, component
side
Default: closed

Control Unit Models 9010 LCD and 9020 LCD
20
Configuration MSA
GB
MSA OPTO-ISOLATOR BOARDS 173 and 174 [board installed by request]
CONFIGURATION 9010/20 LCD FOR SENSORS/TRANSMITTERS FOR GENERAL
PURPOSE BOARD
CV 1 pos. 1-2 External power supplies Drop of solder
[component side]
For applications with
separate external
power supplies
CV 1 pos. 2-3 Internal power supplies Drop of solder
[component side]
Default configuration
Connection type CURRENT LOOP
TWO-WIRE
CURRENT
LOOP
THREE-WIRE
SENSOR
THREE-WIRE
SENSOR
THREE-WIRE
Type of transmitter Series 27 Df 9500
UltimaXE [2-wire]
Ultima
XE/XIR/XI
RG-3LCD
Catalytic
Thermocondu.
Sensor/trasm.
power supply
VOLTAGE VOLTAGE CURRENT VOLTAGE
Input signal mA mA mV mV
Points to short circuit
CH A CH B
CV1 CV1 pos. 2-3 pos. 2-3 pos. 1-2 pos. 2-3
CV2 CV2 
CV3 CV3  
CV4 CV4 
CV5 CV5 
CV6 CV6 
CV7 CV7  
CV8 CV8
CV9 CV9 pos. 1-2 pos. 1-2 pos. 1-2 pos. 1-2
CV10 CV10
CV11 CV11
CV12 CV12