3 – SYSTEM2 BOARD
SPDM CONTROL BOX
NIDEC ASI S.P.A. – SPDM CONTROL BOX USER MANUAL
36
IMSPDCB2EN
3.1.1.14
P28, CONFIGURATION OF ANALOG INPUT AI1 AS NTC INPUT
The jumper P28 allows to condition the analog input AI1 for NTC sensors measure, in this case a 2,21KΩ resistor is inserted between the reference
voltage at terminal 22 (ME + 10V) and terminal 35 (ME-AI1 +). The table below illustrates the setup.
Config. P28
Analog input AI1 type
1-2
Voltage/current analog input
2-3
NTC input
Table 3-12: Configuration jumper P28.
3.1.2
Buttons
3.1.2.15
SW1, RESET
SW1 button has two functions:
• If pressed for less than 0.5 seconds produces the statement and storage of power disable signal.
• If pressed for a time longer than one second produces a reset (Power On Reset) to SYSTEM2 card.
3.1.3
Switches
3.1.3.16
SW2, SELECTION OF ANALOG INPUTS TYPE
The four ways dip-switch SW2 allows you to configure the isolated analog inputs AI1
AI4 to accept signals in current. The function of each switch
is to insert a resistor of 500
between the lines + and - for each input. The table below shows the assignment of the dip-switch SW2 switches to
the analog inputs.
switch of SW2
Analog input
1
AI1
2
AI2
3
AI3
4
AI4
Table 3-13: Analog input controlled by SW2.
In the table below it is shown the configuration of the switches SW2.
SW2 position
Type of analog input
ON
Current (0÷20mA)
OFF
Voltage (±12V) (Default configuration)
Table 3-14: Configuration of SW2.
