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5.2 - Connector functions
The connector CN3 provides 3 optocoupled inputs that can be operated from contacts logic levels supplied by an
external 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
respect to PIN 1 or COMMON. The association is achieved through the programming of a number between 0 and 16
corresponding to one of the functions listed in the following table.
•
Factory configuration
As shipped from the factory, the CN3 connector allows the PEAK and VALLEY functions operated from the front-panel
keyboard and moreover incorporate the HOLD function.
When a HOLD is made, the display value remains frozen while the corresponding pin is activated. The HOLD state,
affects neither the instrument internal operation nor the analog and setpoint outputs.
CN3: FACTORY CONFIGURATION
PIN (INPUT)
Function
Number
PIN 1
COMMON
PIN 2 (INP-1)
PEAK
Function nº 3
PIN 3 (INP-2)
VALLEY
Function nº 4
PIN 4 (INP-3)
HOLD
Function nº 6
Logic functions diagram
1 2 3 4
1 2 3 4
CN3
1 2 3 4
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 instructions given on Page
9.
5.2 - Connector functions
The connector CN3 provides 3 optocoupled inputs that can be operated from contacts logic levels supplied by an
external 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
respect to PIN 1 or COMMON. The association is achieved through the programming of a number between 0 and 16
corresponding to one of the functions listed in the following table.
•
Factory configuration
As shipped from the factory, the CN3 connector allows the PEAK and VALLEY functions operated from the front-panel
keyboard and moreover incorporate the HOLD function.
When a HOLD is made, the display value remains frozen while the corresponding pin is activated. The HOLD state,
affects neither the instrument internal operation nor the analog and setpoint outputs.
CN3: FACTORY CONFIGURATION
PIN (INPUT)
Function
Number
PIN 1
COMMON
PIN 2 (INP-1)
PEAK
Function nº 3
PIN 3 (INP-2)
VALLEY
Function nº 4
PIN 4 (INP-3)
HOLD
Function nº 6
Logic functions diagram
1 2 3 4
1 2 3 4
CN3
1 2 3 4
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 instructions given on Page
9.