131 - 23/May/97
APPENDIX A - SERIAL LINK MULTIDROP
D.1 DBM-PS Internal Jumpers (see par. 1.8A)
In case of multidrop, the following configuration must be used.
To user
D.2 Personality Card Jumpers (see par.2.2.7)
By default G1, G4 and G5 jumpers on the personality card are open (no link terminations on
modules). In fact, usually, it is not necessary to close G1, G4 and G5 jumpers because the
link terminations are already closed on the power supply; anyway, in specially noisy
environments, could be necessary to close them also, as follows.
•
•
Environment without noise
•
•
Specially noisy environment
Power
Supply
Power
Supply
JP1,JP2,JP3
open
Power
Supply
JP1,JP2,JP3
open
Module
Power
Supply
Module
JP1,JP2,JP3
open
Module
Module
Power
Supply
JP1,JP2,JP3
(see par.A.1)
JP1,JP2,JP3
closed
G1,G4,G5
open
G1,G4,G5
open
G1,G4,G5
open
G1,G4,G5
open
To user
Power
Supply
Module
Module
Module
Module
JP1,JP2,JP3
(see par.A.1)
G1,G4,G5
open
G1,G4,G5
open
G1,G4,G5
open
G1,G4,G5
closed
To user
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