4-20mA Signal Transmitter & Receiver
TXA15101E
- 4-20mA Transmitter
- 11 – 13.6 Volts DC
- 151MHz Frequency
- Industrial or Commercial use
151MHz Analog Transmitter and Receiver for 4-20mA Signals
The 151MHz Analog Transmitter (TXA15101E) and Receiver (RXA15101E) is designed by Elsema, to provide exceptional long distance communication with an impressive operational range of up to 5000 meters.
This system delivers maximum efficiency, its transmitter draws just 85mA of current, making it an excellent choice for power sensitive applications. The low power consumption not only extends the lifespan of the transmitter but also ensures reliable operation in environments where conserving energy is critical.
The TXA15101E and RXA15101E operate on the 151MHz frequency, specifically selected to minimize interference from both natural and artificial sources. This frequency choice enhances the system’s reliability, particularly in demanding commercial and industrial environments where clear, long distance communication is essential. The system efficiently handles analog signals within the 4-20mA range, ensuring precise signal transmission and reception, which is vital for maintaining accuracy in data transfer.
Both the transmitter and receiver are housed in durable enclosures, designed to withstand tough conditions. These enclosures feature terminal strips that allow for straightforward wiring and installation, further simplifying the setup process. For the best performance and maximum operational range, we recommend using the ANT151M antenna, which ensures stable and reliable communication even in challenging environments.
In operation, the transmitter sends a 4-20mA analog signal that the receiver accurately reproduces at its analog output. Additionally, the transmitter includes a digital input that can operate simultaneously with the analog input, making this set highly versatile for a wide range of applications that require dependable wireless communication.
Learn more about wireless remote control communication, including its principles, applications and advancements, in this detailed article.
Elsema: Frequently Asked Questions
What is the main function of the Elsema 4-20mA wireless system?
The system is designed to wirelessly transmit a standard 4-20mA analog signal from a sensor or instrument to a remote location. The transmitter (TXA15101E) converts the analog input into a radio signal, which the receiver (RXA15101E) then accurately recreates at its output.
What is the maximum operating range of the system?
When used with high-quality antennas (such as the Elsema ANT151M) and maintaining a clear line of sight, the system can achieve an impressive operational range of up to 5,000 metres.
Why does this system operate on the 151MHz frequency?
The 151MHz band was specifically selected for its superior penetration in industrial environments. Unlike higher frequencies, which tend to reflect off metal surfaces, 151MHz is more effective at passing through steel construction and congested structures.
Can the system transmit digital signals as well?
Yes. In addition to the 4-20mA analog channel, the transmitter features a secondary digital input for a normally open (NO) contact. Both the analog and digital signals can be transmitted simultaneously to the receiver.
What level of accuracy does the analog channel provide?
The system uses 10-bit resolution for the 4-20mA analog channel. This provides high precision, making it suitable for industrial monitoring tasks such as tank level sensing, flow measurement, and pressure monitoring.
How is the transmitter powered?
The TXA15101E transmitter operates on a supply voltage of 11 to 13.6 Volts DC. It is engineered for high efficiency, drawing approximately 85mA during transmission and only 12mA while in standby mode.
What are the power requirements for the receiver?
The RXA15101E receiver offers flexible power options, accepting 12 to 24 Volts DC. This versatility simplifies integration into existing control panels and field power supplies.
How do you pair the transmitter and receiver?
Security and pairing are managed via a 12-way DIP switch. By matching the switch settings on both the transmitter and receiver, you ensure a secure and dedicated communication link.
Can multiple systems operate in the same area without interference?
Yes. The system features 8 user-selectable frequencies within the 151MHz band. By setting different frequency combinations on the internal 3-way DIP switch, multiple independent systems can operate nearby without interfering with each other.
What are the typical applications for this 4-20mA system?
Common applications include remote tank level management, irrigation and flow sensing, temperature monitoring, environmental monitoring, and machine condition monitoring in industrial, commercial, or agricultural settings.
