New product Low cost small size two-wire passive PWM to 4-20mA Isolation Transmitter  
ISO D1-O1

Features  Applications 
Unique loop-powered technique used, external power supply is not required. 
PWM pulse width signal input, 4-20mA loop powered output type. 
10Hz--50kHz  PWM  signal  input,  high  sensitivity,  fast response. 
High linearity in full measuring range, non-linearity<0.2% 
3kV isolation between input and output. 
Extra small size 22x11x9mm, error grade: 0.1, 0.2, 0.5 
SIP 8-Pin PCB-mounting, UL94V-O flame-retardant package. 
High anti-interference ability on EMC magnetic interference or high frequency signal. 
Industrial operating temperature range: -40--+85Cel. deg.

Application 
PMW signal long-distance transmission, isolated conversion. 
PLC and Inverter control in industrial site. 
Signal Ground wire anti-interference. 
Boiler temperature automatic control. 
DA Converter designed on the basis of PWM. 
Processing control and automatic equipment 
PWM to 2-wire 4-20mA signal isolated control,
1-channel input 1-channel output or 2-in 2-out isolated conversion.

Description 
SunYuan    ISO D-O1 is an micro-size low power consumption passive integrated transmitter IC designed 
for the isolated conversion from PWM pulse width signal into 2-wire 4-20mA signal. That IC operates in current 
loop powered in output terminal mode, it receives PMM signal from input, and converts it into corresponding 
isolated 4-20mA standard 2-wire current signal in linearity.     
SunYuan    ISO D-O1 series PWM Pulse width transmitter is a kind of integrated mixed circuits which can 
convert the duty ratio of PWM signal into isolated standard current signal. The transmitter IC is in low cost, small 
size  standard  SIP  8Pin  flame-retardant  package.  It  has  combined  with  the  following  circuits:  signal  coupling isolated conversion circuit, precision reference voltage source switching control circuit, low-pass filtering circuit, driving  amplification  circuit,  VI  conversion  circuit,  etc.  The  output  loop  powered  power  supply  range  is 12-36VDC, PWM signal is converted in high accuracy and linearity. The hybrid integrated circuit and isolated technique  used  enable  that  transmitter  IC  to  operate  in  3KV  isolation  between  input  and  output  and  operate  normally in the severe operating environment, like high/low temperature, humidity, shake, etc in industrial site.   
SunYuan ISO D-O1 is designed by using high speed optically coupled isolation mode and high efficiency 
feedback  loop  powered  technique  to  achieve  the  isolated  conversion  from  PWM  signal  to  4-20mA  standard  signal. It can be well matched with the input interface of various types of meters and instruments like PLC, DCS, FCS,  etc.  Operating  in  loop  powered  mode  and  extra  small  size  (22.0X11.0X9.0mm)  can  effectively  simplify  user's  system  layout  and  save  the  space  and  cost  in  designing  an  application  solution.  The  transmitter  has 35mm DIN Rail-mounting package and PIM embedded board with display type. For 35mm rail-mounting type, it  has single input, single output, dual input-output, triple input-output type. PIM embedded board with display type can realize sensor signal isolation and display, alarm control, long-distance transmission without distortion. It is widely  applied  to  electric  power  system,  telecom,  instrumentations  &  measurements,  medical  equipments, industrial intelligent control, automotive electronics, security-monitoring system, military industry, etc.  

General Parameters 

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Commonly used two-wire passive isolation amplifier, isolation transmitter IC, Sunyuan product technical information download: 






Commonly used active type (external auxiliary power supply required) isolation amplifier transmitter IC, product selection application data download: 







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