Control Unit Models 9010 LCD and 9020 LCD
44
Appendix
MSA
GB
12.2 Appendix 2
Control Unit 9010/20 LCD
Control Units 9010 LCD and 9020 LCD can accept, respectively one or two input signals originat-
ing from sensors/transmitters. These sensors/transmitters, with a 4-20 mA circuit will have to have
the right CE [EC] type certificate and will have to conform to Section 1.5 of Attachment II of
Directive 94/9/CE.
Control unit channels A and B configured for an input signal of 4-20 mA
Measurement range 0-100 % LEL
Fig. 13 Response curve for mA input
Input 4/20 mA Theoretical reading Display reading 9020 LCD
Ch A Ch B
2 -12,5 d1 d1
40 00
6 12,5 12 12
825 2525
10 37,5 37 37
12 50 50 50
14 62,5 62 62
16 75 75 75
18 87,5 87 87
20 100 100 100
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