High Linearity 4-20ma Loop Signal Isolator For Instrument Signal Acquisition

Detailed Product Description

 

High Linearity 4-20ma Loop Signal Isolator For Instrument Signal Acquisition

 

 

Specifications:

 

>>Power supply no needed, non-isolation, two-wire loop powered.

>>Wide range input voltage signal

>>4-20mA high accuracy(0.05,0.1,0.2)

>>High linearity(Nonlinearity<0.1%)

>>Low cost, small size, standard SIP7 package

>>4-20mA signal input/Output

>>Industrial temperature(-45—+85 ℃)

 

SY 4-20mA-P is a two-wire 4-20mA analog signal acquisition chip, belongs to SY 4-20mA series products.It contains internal signal acquisition, conditioning and conversion circuits coupled. A very small input equivalent resistance, so that this circuit can be collected from the sensor signal to achieve ultra-wide range (7.5 ~ 32V) voltage to meet the users do not need an external auxiliary power supply and the realization of long-distance signal, no transmission distortion. The IC output is 24VDC and sampling for the resistance (load resistance) in series two-wire loop-powered design, and with the current commonly used analog input interface board (upper plane), PLC, DCS, and other commonly used for analog instrumentation input port to match. And can meet the temperature, humidity, vibration and other harsh industrial on-site environmental requirements. SY 4-20mA-P product is very convenient, just add a 2KΩ to the multi-turn potentiometer ADJ correction, you can achieve the two-wire 4-20mA signal transmission function.

 

 

Applications:

 

>>PLC,DCS analog signal data acquisition and isolation

>>No distortion in long distance signal transmission

>>Instrument signal acquisition

>>Industrial fileds analog signal acquisitions and monitoring

>>Sensor signal and analog input interface match

 

 

Vin	36V
Junction Temperature	+85℃
Storage Temperature	+150℃
Lead Temperature	+300℃
Output Short to Common	Continuous

If input value is over above range, it may cause permanent damage.

 

GENERAL PARAMETER:

Parameter	Condition	Min	Typ	Max	Unit
Temperature Drift Nonlinearity			±30 ±0.1	±75 ±0.2	PPm/℃ %FSK
Gain			1		mA/mA
Input current range		0.2	24	40	mA
Input impedance			50		Ω
Input over current capability				50	mA
Signal input voltage range		7.5	24	36	VDC
Load capability	24VDC		750		Ω
Output linearity range Output Current :Io		0.2 0.2	4	40 50	mA mA
Output signal ripple				5	mV
Frequency response (Small signal bandwidth)	Io=20mA		2		KHz

 

Part No.

1.current input type:    IN:4-20mA        OUT:4-20mA   Part No.:SY 4-20mA-P

2.voltage input type:   IN:V(User-defined)  OUT:4-20mA   Part No.: V-4-20mA-P

 

DIMENSIONS AND PIN DESCRIPTION:

PIN	Function
1	Sin+	G.adj/IN+
2	ADJ
3	Vref	2.5V base output
4	Sin-	Signal INPUT-
5	NO PIN
6	Io	Current signal OUT
7	Vin	Loop voltage INPUT

 

 

 

 

Application:

First, Sensor 4-20mA current signal acquisition conditioning circuit (2-wire loop powered output mode)

 

 

Second:Sensor voltage signal acquisiton conditioning circuit(2-wire loop powered output mode)

When 0~Vin voltage value  I1=Vin/(R1+ADJ)=160μA

                                            I2=2.5V/(R2+ZA)=40μA

When 1-5V input, I1=5V/(R1+ADJ)=200μA

 

Third: Potentiometer input (angle and displacement) signal acquisition conditioning circuit (2-wire loop poweredt output mode),Resistor and potentiometer setting:

R2+ZA=2.5*100/(4mA-2.5/R)

R1+ADJ=2.5V/0.16mA

 

FAQ:

 

1. When was Sunyuan established? How long has it been in this industry?

 

Answer: Sunyuan was established on Year 2002 by our General Manager Yu Guang Yuan.we have been in this industry for ten years. All our products are R&D by our technical team and win more than 10 patents. In year 2011 was rated National High and New Technology Company.

 

2. What qualification do you have?

 

Answer: According to the different markets' demands, Sunyuan has got the CE certificate; the product materials meet the ROHS requirements. And have approved ISO9001:2008 International Quality Certification in 2012

 

3. What’s your MOQ? Whether can get samples?

 

Answer: NO MOQ limit for EXW.

       Samples are available; some parts can provide free samples.

 

4. What’s the lead time?

 

Answer: 3-5 days.

 

5. What’s the guarantee?

 

Answer: Five years. And within two years, any quality problem can provide maintain and replace.

 

6. Any Foreign distributors?

 

Answer: Sunyuan has distributors located in US, France, Brazil and India.