IEP3000-3
Multi-channel RTD Temperature Measurement Terminal
Category:
The IEP3000-3 series is an industrial-grade standard thermistor temperature acquisition terminal that supports temperature acquisition from 8 channels of two-wire or three-wire PT100 temperature sensors. It uses a constant current excitation temperature measurement method with an acquisition accuracy of up to 24 bits. The AD acquisition part features analog-to-digital optoelectronic isolation, providing strong anti-interference capability, suitable for complex industrial site environments. This acquisition terminal supports wireless WiFi, LoRa, and wired RS485 communication methods, meeting various application scenarios in industrial sites and informatization.
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Design characteristics
· Supports 8 channels of two-wire or three-wire PT100 temperature sensors
· Uses 24-bit high-precision ADC conversion chip, sampling accuracy 0.1%, sampling frequency ≤10Hz
· WiFi wireless remote transmission, outdoor unobstructed transmission distance up to 300 meters
· LoRa wireless remote transmission, outdoor unobstructed transmission distance up to 3000 meters
· RS485 communication interface with communication distance less than 1000 meters, transmission distance can be increased via repeater
Product Advantages
· Uses a 24-bit high-precision ADC conversion chip, with a sampling accuracy of 0.1%, providing higher temperature measurement accuracy
· Modbus-RTU protocol compatible with various configuration and PLC systems
· Wide voltage power supply, operating range +7V to +30V DC, with built-in reverse polarity and overvoltage protection on the power interface
· Input channels and AD input interfaces are optically isolated, suitable for complex industrial environments with strong anti-interference capability
· Plug-and-play USB configuration interface connected to the host computer configuration tool for quick setup
Product Parameters
Application Topology
Product Specifications
| Parameters |
Performance Indicators |
| Temperature Sensor Interface |
|
| Two-wire PT100 |
IN- shorted with COM |
| Three-wire PT100 |
IN+, IN-, COM |
| LoRa Communication Parameters |
|
| Operating Frequency Band |
470MHz~510MHz |
| Communication Distance |
3000 meters unobstructed under ideal conditions |
| Maximum Transmit Power |
20dBm |
| WiFi Communication Parameters |
|
| Operating Frequency Band |
2402MHz-2483 MHz |
| Communication Distance |
300 meters unobstructed under ideal conditions |
| Maximum Transmit Power |
20dBm |
| RS485 Communication Parameters |
|
| Communication Protocol |
Modbus-RTU protocol, compatible with PLC, etc. |
| Communication Distance |
Less than 1000 meters |
| Environmental Parameters |
|
| Operating Temperature |
-40 ºC to +85ºC |
| Storage Temperature |
-40 ºC to +125ºC |
| Relative Humidity |
95% (non-condensing) |
| Power Supply Parameters |
|
| Power Supply Range |
DC 7V~30V |
| Power Consumption |
Less than 10W |
| Appearance Parameters |
|
| Enclosure |
Plastic flame-retardant enclosure, IP30 |
| Dimensions |
145mm x 90mm x 40mm (excluding antenna) |
| Weight |
Approximately 300g |
| Other Interfaces |
|
| USB Interface (for configuring terminal parameters) |
Connects to host computer configuration tool for setup |
| Antenna Interface (SMA connection) |
470MHz LoRa antenna or 2.4GHz WiFi antenna |
Interface and Signal Definition Description
Interface Signal Definition Description
| Interface Number |
Interface Definition |
Remarks |
| V+ |
Power Supply Positive Pole |
|
| V- |
Power Supply Negative Pole |
|
| RS485_A |
RS485 Positive Pole |
|
| RS485_B |
RS485 Negative Pole |
|
| IN0+ |
First PT100 Positive Pole |
Three-wire white / Two-wire one end |
| IN0- |
First PT100 Negative Pole |
Three-wire red / Two-wire other end |
| COM |
First PT100 Common Terminal |
Three-wire red / Two-wire shorted with IN- |
| IN1+ |
Second PT100 Positive Pole |
Three-wire white / Two-wire one end |
| IN1- |
Second PT100 Negative Pole |
Three-wire red / Two-wire other end |
| COM |
Second PT100 Common Terminal |
Three-wire red / Two-wire shorted with IN- |
| IN2+ |
Third PT100 Positive Pole |
Three-wire white / Two-wire one end |
| IN2- |
Third PT100 Negative Pole |
Three-wire red / Two-wire other end |
| COM |
Third PT100 Common Terminal |
Three-wire red / Two-wire shorted with IN- |
| IN3+ |
Fourth PT100 Positive Pole |
Three-wire white / Two-wire one end |
| IN3- |
Fourth PT100 Negative Pole |
Three-wire red / Two-wire other end |
| COM |
Fourth PT100 Common Terminal |
Three-wire red / Two-wire shorted with IN- |
| IN4+ |
Fifth PT100 Positive Pole |
Three-wire white / Two-wire one end |
| IN4- |
Fifth PT100 Negative Pole |
Three-wire red / Two-wire other end |
| COM |
Fifth PT100 Common Terminal |
Three-wire red / Two-wire shorted with IN- |
| IN5+ |
Sixth PT100 Positive Pole |
Three-wire white / Two-wire one end |
| IN5- |
Sixth PT100 Negative Pole |
Three-wire red / Two-wire other end |
| COM |
Sixth PT100 Common Terminal |
Three-wire red / Two-wire shorted with IN- |
| IN6+ |
Seventh PT100 Positive Pole |
Three-wire white / Two-wire one end |
| IN6- |
Seventh PT100 Negative Pole |
Three-wire red / Two-wire other end |
| COM |
Seventh PT100 Common Terminal |
Three-wire red / Two-wire shorted with IN- |
| IN7+ |
Eighth PT100 Positive Pole |
Three-wire white / Two-wire one end |
| IN7- |
Eighth PT100 Negative Pole |
Three-wire red / Two-wire other end |
| COM |
Eighth PT100 Common Terminal |
Three-wire red / Two-wire shorted with IN- |
Antenna Installation Instructions
The antenna interface of the multi-channel RTD temperature measurement terminal is an SMA female socket. Screw the SMA male connector of the matching antenna onto the sensor acquisition edge terminal antenna interface and ensure it is tightened to avoid affecting signal quality.
The antenna placement is as follows:
(1) Try to stay away from large metal surfaces and the ground;
(2) Ensure the antenna is as much as possible in a line-of-sight state;
(3) Minimize obstacles between antennas as much as possible;
(4) Try to shorten the feed length between the antenna and the module.
The effects of different antenna installation methods are shown in the illustration below.
Indicator light description
Multi-channel RTD temperature measurement terminals are usually used in complex external environments. To adapt to complex application environments and improve system operational stability, the multi-channel RTD temperature measurement terminal adopts advanced power supply technology. Users can power the terminal with a standard configured 12VDC/1A power adapter, or directly supply the acquisition terminal with a DC power source of 7V~30V. When users supply power externally to the acquisition terminal, the power supply stability must be ensured (ripple less than 300mV, and instantaneous voltage not exceeding 30V), and the power supply capacity must be greater than 10W.
The temperature acquisition terminal provides four indicator lights: "Power", "WiFi_Link", "LoRa_TX", and "LoRa_RX". The indicator statuses are as follows:
Indicator light description
| Indicator light |
Status |
Description |
| Power |
Off |
Device is not powered on |
| On |
Device power is normal |
|
| WiFi_Link |
Off |
Connected to WiFi |
| Blinking |
Not connected to WiFi |
|
| LoRa_TX |
Off |
LoRa mode not sending data |
| Blinking |
LoRa mode sending data |
|
| LoRa_RX |
Off |
LoRa mode not receiving data |
| Blinking |
LoRa mode receiving data |
Product dimensions
Series model guide
| IEP |
3 |
1 |
00 |
- |
3 |
| Basic model |
Channel type |
Communication method |
Explosion-proof certification |
- |
Sensor type |
| IEP |
2 = Single channel |
1 = WIFI |
01 = Explosion-proof type |
- |
1 = Temperature, vibration, and sound three-in-one sensor |
|
|
3 = Multi-channel analog or temperature |
2 = LoRa |
00 = Basic type |
|
2 = Three-phase current |
|
|
4 = 4 channels |
5 = RS485 |
|
|
3 = PT100 |
|
|
5 = 8-channel piezoelectric |
|
|
|
4 = 4-channel 4-20mA input |
|
|
6 = 16-channel piezoelectric |
|
|
|
6 = 8-channel thermocouple |
|
|
8 = High performance |
|
|
|
|
|
|
|
|
|
|
|
Series model information
| Product model |
Product parameter description |
| IEP3100-3 |
Analog signal acquisition terminal, WiFi communication, 8-channel PT100 |
| IEP3200-3 |
Analog signal acquisition terminal, LoRa communication, 8-channel PT100 |
| IEP3500-3 |
Analog signal acquisition terminal, RS485 communication, 8-channel PT100 |
Material Download
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