Two-wire I/V conversion isolation transmission digital power meter:DIN 1X1 ISO 4-20mA-O (LED1)
Product Category: Passive Intelligent Isolation Amplifier with LED Display
Input: 4-20mA Output: 0-5V,0-3.3V
Power: -- Isolation Voltage: 3000VDC
Package: DIN35 Traffic Watch: times
Remarks: Two-wire I/V conversion isolation transmission digital power meter
Product Description
Two-wire I/V conversion isolation transmission digital meter:DIN 1X1 ISO 4-20mA-O (LED1)

Features:
● High-precision and intuitive display of input loop current value for on-site debugging and monitoring
● Four LED digital display, high precision, display resolution at the end of ± 2 words
● Programmable setting of two-way lower limit isolated switch alarm signal output
● Two-wire 4-20mA standard analog input, isolated and converted into:
     Analog voltage signal such as 0-2.5V/0-3.3V/0-5V/1-5V
● Accuracy grade: 0.1, 0.2, non-linearity <0.2% of full scale
● Between signal input and output: 3KVDC or 6KVDC high isolation
● Low impedance (integrated device voltage drop <12V) eliminates the need for external components and power supplies
● 4-20mA signal ultra-wide range voltage (12~36VDC) input
● Frequency response (small signal bandwidth): 100HZ (Io=20mA)
● Low cost, small size standard DIN35 rail mounting
● Industrial temperature range: - 25 ° C ~ + 70 ° C

typical application :
● Sensor current signal acquisition isolation, transmission and display
● PLC\DCS input channel signal acquisition isolation anti-interference
● Control board ground loop interference suppression
● Reliable transmission and reception monitoring between instrumentation signals and sensors
● Analog signal data acquisition isolation and long-line distortion-free transmission
● Power instrumentation, medical equipment monitoring isolation barrier
● Rail transit DC high voltage sampling monitoring barrier
● Industrial equipment operation measurement, monitoring and remote control
● Oil, chemical, environmental protection, mining system control point monitoring
● Temperature, pressure, flow, liquid level signal display and control
● Sensor and transmitter working status display and control

SunYuan DIN 1X1 ISO 4-20mA-O (LED1) is an intelligent two-wire passive 4-20mA current-to-voltage signal conversion display control isolator that converts the input active 4-20mA current signal into Voltage signal output. The product adopts two-wire input loop power supply mode, which has unique high-efficiency signal loop stealing technology and does not require external working power supply. It greatly simplifies the user's design and reduces the cost of user wiring. The product set display, alarm, isolation, and transmission are all in one. The internal signal modulation and demodulation circuit, signal coupling isolation conversion circuit, power supply inverter circuit, subtraction circuit, buffer processing output circuit, display and alarm circuit are included. The small input equivalent resistance allows the product to collect current signals from the sensor signal output loop and achieve a voltage drop of ≥12V when inputting a 20mA signal. To meet the needs of users without the need for external auxiliary power to achieve long-distance, distortion-free transmission of signals. The product is isolated and transmitted for the sensor and PLC output 4-20 mA signal. From another definition, it is the transmission of electric power, so there must be power loss inside. This loss is expressed in the product of the input current value and its own input voltage drop. In this case, the 4-20 mA source must have the ability to drive a 600 Ω load in order for the two-wire passive I/V converter DIN 1X1 ISO 4-20 mA-O (LED) to function properly. At present, from the actual application experience of industrial sites, most of the field instruments and sensors, PLC\DCS, etc. can meet the 4-20mA signal output and have the ability to drive 600Ω load.

The DIN 1X1 ISO 4-20mA-O (LED) product is intelligently designed with a variety of functions not found in traditional products. The product is a passive design that isolates the 4-20 mA analog input in the input loop. Send, and display it in decimal digits according to the set range. The two-wire passive type working mode does not require other auxiliary power supply, so the wiring is simple and convenient, small in size, high in precision, and low in cost. The traditional embedded analog display meter is adjusted by a potentiometer, and the adjustment parameters are single, inflexible, and greatly affected by temperature. Compared with the traditional analog display table, this intelligent digital display table is operated by two key combinations and controlled by the central processing unit CPU, which can realize setting of various parameters such as zero point, full scale, decimal point, alarm and delay. , with strong flexibility and practicality. The digital display meter adopts an LED display panel, and each section of the display panel is driven by a constant current to make the brightness in the range of 4-20 mA uniform, and has a reverse and overcurrent protection function. The products are widely used in industrial control, petrochemical, environmental protection, smart home, mining and other industries to monitor the temperature, pressure, displacement, flow, liquid level and other physical quantity control points.


DIN 1X1 ISO 4-20mA-O (LED) products are mainly used to isolate and display active 4-20mA current to voltage signals for two-wire sensor output. Its embedded digital display is used to measure the 4-20 mA signal and can be directly measured on the 4-20 mA loop signal without external power supply. The displayed number is not a direct current measurement, but a preset value of 4 mA, 20 mA, and the measured current value is linearly displayed relative to the two preset values. For example: 4mA is set to 0, 20mA is set to 8000, then the meter will display 2000 when inputting 8mA, 4000 will be displayed when inputting 12mA; if the 4mA is set to 1000, 20mA is set to -1000, when inputting 12mA, the watch will be 0 will be displayed, and the table will display -500 when 16 mA is input. The maximum display range of the digital display is 9999, which is four digits; the minimum is -1999. At the same time, it has alarm signal output function with two isolated switch outputs, which can display, control and alarm on the spot. Two alarm points are set and there are positive and negative alarm direction settings. The alarm object of the alarm point is for the display reading. The last decimal point of the LED panel flashes during the alarm, and the alarm information is isolated and output by the digital optocoupler. For products that need to set the alarm function, the upper or lower limit alarm value and alarm mode can be modified by the programmer. For detailed setting method, please refer to the “Display Table User Manual”.
Remark: The alarm signal is the OC gate (open collector) output. For the specific application, please refer to [Alarm Output and Application].
 
Product selection example:
Example 1: Input: 4-20mA output: 0-5VLED display Product model: DIN 1X1 ISO 4-20mA-O4 (LED)
Example 2: Input: 4-20mA output: 0-2.5VLED display Product model: DIN 1X1 ISO 4-20mA -O2.5 (LED)

Product Image:

Alarm output and application:
1. The DC level signal generated by the two-way alarm signal in the main CPU chip is isolated and output by the optocoupler. The output low level indicates the alarm state, and the output high level is the non-alarm state.
2. Because the display controller is passive two-wire system, the minimum working current is 3mA, so the alarm signal is also very weak, the minimum is only 0.5mA. The signal is isolated by a phototransistor type photocoupler with a strong current spreading capability, and an open collector (OC gate) output is used. The output is connected to the pull-up voltage, and the current can be expanded up to 120mA. The principle of this phototransistor type photocoupler is shown in the figure below: the instrument signal is isolated by optocoupler, 5, 6 "1H /1L", 7, 8 "2L /2 H" wiring port is optocoupler OC gate The output end of the signal is connected to the external power supply circuit of the instrument, and further amplifies and energizes the alarm signal, and finally reaches an actuator that can drive the required sound, light, electricity, refrigeration, heating, and motor. 5, 6 "1H / 1L" is the first alarm output, 7, 8 "2L /2 H" is the second alarm output, "1H", "2H" connected to the phototransistor collector, "1L", "2L emitter.

3. Due to the limitation of the maximum current of the phototransistor Ic, its expansion and driving load capacity is limited. If the user needs more driving current, it can be used to drive relays, solenoid valves, stepping motors and other devices on site, and can externally connect the power expansion circuit. The power amplifier tube or servo circuit is subjected to current amplification and special processing.
 

Order selection instructions:
Please read the entire contents of this manual carefully before ordering to determine whether the product meets the user's on-site application and is correctly selected.
1. The factory default setting of this product is set to “0.0” by 4mA and “200.0” by 20 mA.
2. When ordering, the user should first put forward the display specification requirements. We will adjust the digital display meter before leaving the factory, which is convenient for users to use directly.

Related Data Sheets
Product Categories
Product Recommended
Copyright ©2002-2018 Sunyuan Corporation. All rights reserved. SHENZHEN SUNYUAN TECHNOLOGY CO., LTD. Address: 2nd Floor, Building#6, Dongyi Industrial Park, Zhonghuan Road, Minzhi St. Longhua New District, Shenzhen, 518109, China. Tel: +86-755-83100080 83100110 Fax : +86-755-83116652 Email: sy@sun-yuan.com