ELSEMA Single Channel, 151MHz Analog Transmitter, TXA15101E TXA15101E Single Channel, 151MHz Analog Transmitter Features • • • • 1 analog channel which is 4-20mA with 10 bit accuracy 1 digital channel which is a normally open contact Up to 5 km range with line of sight operation 12 way dip switch to set transmitter and receiver ID Applications • • • Monitoring storage tank levels Remote temperature and humidity monitoring Monitoring flow rates, industrial equipment and machinery Description The TXA15101E is an analog and digital 151 MHz transmitter. The analog signal, normally 4-20mA is transmitted and then recreated at the receivers (RXA15101E) analog output. Also, the normally open digital contact can be simultaneously transmitted with the analog signal. This eliminates the high cost of wiring and has the flexibility of wireless data collection. Using 151MHz has superior penetration in congested industrial environments with steel construction. Higher frequencies such as 433MHz or 915MHz tend to reflect of metal and make wireless data collection difficult. The on board 12-way dip switch sets the ID for the transmitter. This has to be matched to the 12 way dip switch on the receiver for a No case version is also available - TXA15101 The TXA15101 transmitter is the PCB assembly only, while the TAX15101E transmitter is enclosed in an alloy metal case. External supply connection and SO239 antenna socket is provided with the transmitter. Modes The one way mode switch on the board selects the sampling transmission rate. Mode Sw. 1 OFF : Sample Rate 2 to 62 seconds. Transmitter will transmit a 1.5 second transmission burst and then stop for the time selected. The time is user selectable between 2 to 62 seconds by adjusting the trimpot of the transmitter board. If the digital input is activated during the "off delay" period the new data will be transmitted immediately. The transmitter will indefinitely transmit if the supply is connected. Mode Sw. 1 ON : Off Delay 1 to 10 minutes. Same as mode 1 except the sample rate is user selectable between 1 to 10 minutes. Longer sample rates are possible. Contact Elsema. ELSEMA Single Channel, 151MHz Analog Transmitter, TXA15101E Technical Data Supply Voltage 11 to 13.6VDC (for constant RF output), screw type terminal. Absolute maximum 14VDC. Battery Operation 9 Volts Battery, with additional wire link added by user. See picture below. Warning: DO NOT APPLY 12 Volts to the supply terminal when the battery link is added. This will damage the transmitter. Current Consumption Nominal 80mA at 12VDC (Transmitting), 12mA on standby Operating Frequencies 151.6 MHz (Link 1, Link 2, Link 3) 151.5MHz (No Link 1, Link 2, Link 3) 151.4MHz ( Link 1, No Link 2, Link 3) 151.3MHz (No Link 1, No Link 2, Link 3) 151.2MHz (Link 1, Link 2, No Link 3) 151.1MHz (No Link 1, Link 2, No Link 3) 151.0MHz (Link 1, No Link 2, No Link 3) 150.9MHz (No Link 1, No Link 2, No Link 3) Inputs 4-20mA analog and Normally open contact Oscillation System VCO with 10ppm crystal controlled reference oscillator Operating Temperature -5 to 50°C Range Frequency Deviation +/-5 kHz Type of Emission Narrow Bandwidth Frequency Modulation R.F. Output Power 100mW into 50Ω SO239 socket Antenna SO239 socket provided. Optimum performance with Elsema ANT151M antenna Internal Resistance on 200Ω Analog Input Maximum Current on 25mA Analog Input Coding System On board 12 way code switch Dimension 140 X 60 X 34mm Mounting Hole Size 4.76 mm or 3/16” Mounting Hole Space Length 125mm (4.92”) Width 45 mm (1.77”) Weight 225 grams Useable Operating Range Up to 5000m, depending on installation and type of antenna used. Recommended Antenna is Elsema ANT151M Compatible Receiver RXA15101E or RXA15101 ELSEMA Single Channel, 151MHz Analog Transmitter, TXA15101E Block Diagram The connection for the analog input is as follows: Sensor: The sensor can be any device that will output 4-20mA’s when connected to the TXA15101 analog input. The TXA15101 has an internal 200Ω resistor that has to be accounted for when deciding on what supply is to be used for the sensor. The sensor is usually a device used to monitor tank levels, temperature, humidity, flow rates etc. Manufactured by Elsema Pty Ltd 3/10 Hume Rd, Smithfield NSW 2164 Ph: 02 9609 4668 Fax: 02 9725 2663 Website: http://www.elsema.com Distributed by :