4
1.2.1 Analog input blocks (Refer to Sec. 7)
l
AI1
,
AI2 and AI3
are analog input terminals.
l
AM
terminal is used for analog signal output.
l
ACOM
is the common terminal for analog circuit.
l
The
5V
terminal supply 5V.
l
Inside the control board, there are three jumpers
JP1
,
JP2
and
JP3
. They are used for selecting the hardware
configuration of AI1, AI2 and AI3 respectively.
Note: there are only two jumpers JP1 and JP2 in PDA/H-4015, PDE-2007/2015.
1.2.1.a Analog input AI1 module
JP1
is used to define the characteristic of the input terminals
AI1.
l
If you are using external analog voltage 0 ~ +10V input,
please use
AI1
and select
JP1
to
+10V
position.
l
If you are using external analog voltage 0 ~ +5V input to
AI1
, select
JP1
to
+5V
position.
1.2.1.b Analog input AI2 module
JP2
is used to define the characteristic of the input terminal
AI2
.
l
If you are using 0 ~ +5V input (external or internal
voltage reference) to AI2, select
JP2
to
+5V
position.
l
If you are using external 20mA current input to AI2,
must select
JP2
to
20mA
position.
1.2.1.c Analog input AI3 module
The LOCAL panel has built in a small potential meter VR.
Through jumper
JP3
, user can select the input source of
AI3
either from terminal or from panel.
For models PDA/H-4015, PDE-2007/2015, because there is no
AI3 input terminal, the CPU always connects to panel VR.
1.2.2 AM the Analog output module (Refer to Sec.10)
The output voltage of AM terminal comes from CPU in PWM
waveform. Its duty cycle is proportional to the desired analog
amplitude. And the signal is filtered by internal resistor R and
capacitor C.
22k
22k
JP1
AI1input
To CPU
+10V
+5V
249
JP2
AI2 input
To CPU
20mA
+5V
JP3
AI3 input To CPU
PAN
TER
AI3 terminal
Panel VR
PWM Waveform
from CPU
1k
AM
L
R
820uH
Width proportional
to desire voltage
C