Analog Input Setup

 

The 9120 controller has two analog inputs. Each of the inputs comes with a factory default configuration dependent on the application (refer to PVT type under the Furnace Setup section).  It can be modified prior to shipment to your facility or in the field by a technician or qualified/trained person with the proper security code.

 

Analog Input Terminals

Analog Input 1 – terminals 31 and 32

Analog Input 2 – terminals 29 and 30

 

For the RPS, the default input type is 2.5 Volts, with a range of 2500.

 

Input Type

The thermocouple type for most applications can be modified depending on your specific needs. Please note that in some applications, some of the inputs DO NOT allow the user to modify the Input type. Note: Before changing the input type, make sure to set the appropriate jumpers, if necessary.  The jumper will need to be manually changed on the input board before changing the input type to a 10:1 setting (non-thermocouple types).  To change the Input type, first select which input you want to change by selecting it in the pull-down menu at the top of the screen.  Once selected, click OK and the displayed Input type under Value will be the current type.

 

The following is a list of the options:

B            

C            

E            

J            

K           

N            

NNM    

R            

S            

T            

2.5 volts        

1.28 volts

 78.125 mV

19.53125 mV

 4-20 mA

25 volts

12.5 volts

781.25mv

195.3125 mV

 

 

Filter time

The filter time is a factory applied averaging tool used to help maintain steady control in high EMI environments. The filter time should not be adjusted without consulting SSI.  The range is 0 to 32767.

 

Initial Scale

This is the initial scale value.  Clicking on this value will display an input box from which the user can select a new value.  This could also be referred to as the starting value.  For example, the initial value is the value when 0 volts is on the selected input; or on a 4-20 mA input, it would be the value at the selected input of 4 mA.  The range is –32768 to 32767.

 

Full scale

This is the full scale value.  Clicking on this value will display an input box from which the user can select a new value.  The range is –32768 to 32767.

 

Decimal Point Location

This is the decimal point location value.  Clicking on this value will display an input box from which the user can select a new value.  This will affect the PV value and the location of the decimal when it is displayed.  The range is 0 to 4.

 

Open TC behavior

This is the open TC value.  The options are: up scale or down scale.

Input Offset

The input offset value is algebraically added to the input value to adjust the input curve on read-out.  Note: The input offsets are unscaled.  The range is –32767 to 32767.