Chapter 9 Expansion Module 223
Analog Module
The maximal connectible number of Analog expansion module to SMT is 2*2AO, 1*4PT and 1*4AI.
Analog Input Module 4AI
The 4 channel 12bits analog input module, 4AI, has the corresponding registers, A05~A08, DREC~DREF,
DRE4~DRE7. It can accept either 0~10V or 0~20mA signal, the range of the measured value is different which
depends on the input signal mode. See the below table for more information.
Mode voltage current
Analog output range 0V~10V 0mA~20mA
Differentiation 10mV 40μA
Digital output 0.00V~9.99V 0.00mA~20.00mA
Register
value
A05~A08 0~999 0~500
DREC~DREF 0~4095 0~2047
±
±
The current value of 4AI input displaying as shown below:
Wiring
PE PE PE PEPEPE
PE
PE
INPUT (0...10V/4-20mA)
PE
C1
V1I1
C4
V4I4
C3
V3I3
C2
V2I2
PE
C2
V2I2
PE
INPUT (0...10V/4-20mA)
PE
C1
V1I1
C4
V4I4
C3
V3I3
Press key:
SEL+→