Toshiba V Series Manual page 134

5. PI/O Module
SAO01 module internal circuitry
120
AO1(+)
AO1( - )
AO8(+)
AO8( - )
Analog circuit
power supply
Module connector
Signal
isolation
D/A conversion
circuit
circuit with
analog lead-
back
Internal
power
supply
Fixed voltage
power supply
circuit
Insulated DC/
DC converter
circuit
System power supply
(24 Vdc)
Status
indicator/
switch
Internal
CPU circuit
RS-485 RS-485
trans- trans-
ceiver ceiver
Phase A Phase B
Dual I/O bus