MSA 9010 LCD, Operating Manual

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Control Unit Models 9010 LCD and 9020 LCD 82
Appendix
MSA
GB
12.5 Appendix 5 Description of Control Unit 9020-4
analysis of combustible gases and oxygen in the ATEX realm. However, the mixed applications
with toxic and combustible gases within the ATEX realm are possible.
Control Unit model 9020-4 uses 2 9020 LCD boards with the frontal circuits of the Control Unit
located remotely on the door of the container, the connection was made via flat cable and the
channels are called A-B-C-D.
The functions, use and software and hardware configurations of the 9020 LCD boards are record-
ed in the Instruction Manual, article no. 0756.167/168.
Inside the container a terminal board is available for the management of the common alarms of
the 2 9020 LCD modules. The configuration of the Control Units must be identical in the state of
the alarm relays [excited for everyone]; the default configuration was suggested; the internal con-
figuration of the voltage on the Control Unit for supplying power to the caution and failure relays
of the terminal board is indispensable; when an external 24 VDC power supply is provided, jump-
ers J1 e J2 need to be installed on the back terminal board, and the selection of the Control Unit
between internal and external is uninfluential. The caution alarm is available with an open relay
contact [it closes in the alarm state]; the failure indication is available with an exchange contact;
the Warning and Alarm alarms are available with a closed or open contact [as a function of jump-
ers J4 and 5]. The main power supply [115 or 230 VAC] is available on 3x3 terminals in order to
possibly use service voltages for lamps or horns. The secondary feed [24 VDC] is available on
2x2 terminals.
Mechanical Installation
The metal container is made of painted sheet steel with thermosetting powder for installations in
industrial environments. The device has passed the vibration tests according to the Rina Specifi-
cation, but it is good to check the magnitude of possible vibrations during the installation because
over time they could prove to be malfunctions.
The dimensions of the container are: 400 x 300 x 150
Cable input from below with plate
Certifications of the container: IP 65, UL and CSA
Colour: Ral 7032
Opening: to the right
Consult accompanying drawing 5060
Electrical installation
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 hazard.
The configurations of the 9020 LCD boards for the connections with the sensors/transmitters are
identical to the use of the individual 9010/20 LCD boards; consult the 9010/20 LCD Instruction
Manual and attached drawing 5080.