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CONNECTOR FUNCTIONS
The connector CN3 provides 3 optocoupled inputs that can be operated from contacts logic levels supplied by an exter-
nal electronic system. Three different functions may be then added to the functions available from the front panel keys.
Each function is associated to a pin (PIN 2, PIN 3 y PIN 4) that is activated applying a low level, in each one, with re-
spect to PIN 1 or COMMON. The association is achieved through the programming of a number between 0 and 15 cor-
responding to one of the functions listed in the following table.
•
Factory configuration
As shipped from the factory, the CN3 connector allows the TARE, RESET TARE functions operated from the front-panel
keyboard and moreover incorporates the HOLD function.
When a HOLD is made, the display value remains frozen while the corresponding pin is activated. The HOLD state, af-
fects neither the instrument internal operation nor the analog and setpoint outputs.
CN3: FACTORY CONFIGURATION
PIN (INPUT)
Function
PIN 1
COMMON
PIN 2 (INP-1)
TARE
PIN 3 (INP-2)
RESET TARE
PIN 4 (INP-3)
HOLD
The external electronics applied to the CN3 connector
inputs must be capable of withstanding a potential of
40 V/ 20 mA present at all terminals with respect to
COMMON. In order to guarantee the electromagnetic
compatibility please refer to the connection instruc-
tions given on Page
LOGIC FUNCTIONS DIAGRAM
KOSMOS SERIE
Number
Function nº 1
Function nº 2
Function nº 6
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MICRA-M
Logic functions diagram
83
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