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
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