4-20mA active signal regulation PLC current loop active load digital display meter:DIN ISO 4-20mA-E (LED)
Product Category: Passive Intelligent Isolation Amplifier with LED Display
Input: 4-20mA Output: 4-20mA
Power: -- Isolation Voltage: 3000VDC
Package: DIN35 Traffic Watch: times
Remarks: 4-20mA active signal regulation PLC current loop active load digital display meter
Product Description
4-20mA active signal regulation PLC current loop active load digital display meter:DIN ISO 4-20mA-E (LED)

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
● 4-20mA current input and output precision, accuracy level: 0.1, 0.2
● Non-linearity <0.2% in full scale
● Active 4-20mA signal acquisition voltage (5 ~ 32V) ultra wide range input
● Signal input and output 3KVDC high isolation
● Active signal input, the output can control the active load in the current loop
● No external power supply, two-wire signal loop power supply output mode
● 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 :
● Two-wire active load signal matching and control
● Signal acquisition isolation and anti-interference between PLC/DCS channels
● Ground loop isolation and interference suppression
● Reliable transmission and reception monitoring between instrumentation signals and sensors
● Analog data acquisition isolation and long-line distortion-free transmission
● Power instrumentation, medical equipment monitoring isolation barrier
● Sensor signal matches analog input and output interface
● Sensor 4-20mA acquisition isolation, conditioning and transmission
● Industrial equipment operation measurement, monitoring and remote control
● Oil, chemical, environmental protection, mining system control point monitoring
● Temperature, pressure, flow, liquid level signal monitoring display
● Sensor, transmitter working status display

SunYuan DIN 1X1 ISO 4-20mA-E (LED1) is an intelligent two-wire active sensor 4-20mA signal display control isolation conditioner that converts input active 4-20mA current signals into isolated passive control Signal output, control two-wire power supply (explosion-proof mode) 4-20mA current loop. The sensor signal acquisition and the analog input interface active load are matched, which effectively solves the problem of collecting the active 4-20 mA current signal and the power supply conflict of the two-wire current loop power supply receiving port. Adopting low-power loop stealing technology, the product does not need independent power supply, and integrates display, alarm, isolation, conditioning and transmission. The product contains current signal modulation and demodulation circuit, signal coupling isolation conversion circuit, display and alarm control circuit. The small input equivalent resistance enables the IC to collect the current signal voltage from the sensor output loop to an ultra-wide range (5~32VDC), so that the user can realize long-distance, distortion-free transmission without external auxiliary power supply. Need. It is convenient for signal matching measurement, remote transmission, isolation, display and other functions. The internal integrated process and new technology isolation measures enable the device to meet the harsh environmental requirements of 3KDC insulation voltage and industrial grade wide temperature, humidity and vibration.
   DIN1X1 ISO 4-20mA-E (LED1) series products are very convenient to use, adopt standard DIN35 rail type installation design, which is convenient for users to install and use. The product can realize 4-20mA current loop isolation and signal display function without external components.
   The DIN 1X1 ISO 4-20mA-E (LED1) product is intelligently designed to provide 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-E (LED1) products are mainly used to solve the problem of power supply collision between the active 4-20mA current signal and the two-wire current loop power supply receiving port, and the signal isolation and transmission. 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 Products:

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. Because of 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.
Sunyuan Technology SY Series Intelligent Digital Display
Sunyuan Technology the newest developed SY LED / SY LCD series,with low cost, small size isolation transmitter 4-20mA two-wire passive intelligent display control instrument, dedicated to sensors and isolation transmitters |isolation amplifiers | PLC | DCS, etc.Isolated transmission of analog signals and intelligent display control. These LED or LCD four-bit high precision intelligent digital display meters use the principle of two-wire passive digital adjustment. The electrical signal passed through the digital measuring circuit is used as the input signal of the display meter and also the working power of the display meter. This two-wire passive type of operation eliminates the need for additional auxiliary power supplies. It is easy to connect in industrial field and has reverse protection and overcurrent protection. Products are widely used in industrial intelligent control, instrumentation intelligence, petrochemical, environmental monitoring, rail transit, electric vehicles, smart home, fire safety, mining monitoring and other industries on temperature, pressure, flow, liquid level, displacement, speed, frequency Monitoring of physical quantity control points. In industrial control systems, most applications use a variety of related sensors to convert physical quantities such as temperature, pressure, and displacement into 4-20 mA electrical signals, and intelligent digital display displays these electrical signals in real time for human convenience. Carry out all kinds of monitoring and control

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