Analog and Digital I/O RF Telemetry System RTU-150/450 Radio Telemetry Units TECHNICAL SPECIFICATIONS Document Features 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17.
OWNER INFORM ATION 1. FCC REGULATIONS 1.1. LICENSING The FCC requires you to obtain a station license for your DATAFLOW RTU system before using it, but does not require an operation license or permit. The station licensee is responsible for ensuring that the transmitter power, frequency and deviation are within the limits specified by the station license. The licensee is also responsible for the proper operation and maintenance of the radio equipment.
. CAUT IONS 1. 2. 3. 4. 5. 6. 7. 8. 9. ALL DIGITAL INPUTS, ANALOG INPUTS, ANALOG OUTPUTS, AND MEASUREMENTS OF THE DATAFLOW RTU ARE REFERENCED TO GROUND. DO NOT USE THE DATAFLOW RTU WITH EQUIPMENT THAT REQUIRES COMPLETE ISOLATION. ALL DATAFLOW RTU DIGITAL OUTPUTS ARE ISOLATED LATCHING RELAYS. DO NOT EXCEED CONTACT RATINGS OF THESE RELAYS. EXCITATION VOLTAGE AND LOAD DRIVE VARY FROM MANUFACTURER TO MANUFACTURER.
6 GENERAL SPECIFICATIONS 6.1 SYSTEM SPECIFICAT IONS: FCC ID: RTU-150 - AIERIT04-150 RTU-450 - AIERIT04-450 10K8FID Maximum of 6 programmable from 0 to 5 V programmable from 0 to 5 V 2 isolated latching relays 2.0A 30VDC .5A 110VDC .
7.1.
paragraph to attach the mounting bracket to the case. Be sure the narrow portion of the keyhole is positioned towards the top (UHF antenna connector) of the DATAFLOW RTU. 10. POWER 10.1 The RTU power source is a user-provided external power supply meeting the following criteria: Between 10 VDC and 16 VDC with 12 VDC nominal; Has less than 1 V peak-to-peak of ripple; Provides 1.5 A with the transmitter in low power (2 W) setting; Provides 2.5 A with the transmitter in high (5 W) power setting. 10.1.
GROUND. The threshold level between HIGH and LOW is programmed with DATAFLOW RTU Programming Software. PARAMET ER HIGH LOW ABSOLUTE LIMITS MINIMUM programmable V Programmable k ohm 0V 0 ohm -2 V MAXIMUM 5V infinite ohm programmable V programmable k ohm 7V 13.1.1 You can invert the input state of a RTU unit, which will cause a DATAFLOW RTU reading a switch as HIGH to transmit the switch status as HIGH to another DATAFLOW RTU.
PARAMET ER INPUT RANGE SOURCE IMPEDANCE ABSOLUTE LIMITS MINIMUM 0 mA -8 mA MAXIMUM 20 mA (Ev-5)/.02 ohm 28 mA 15.2 All analog inputs are non-isolated. All analog measurements are referenced to GROUND. Take care when connecting the DATAFLOW RTU to external sensors. 15.3 The user can invert the input state of a DATAFLOW RTU if desired, which will cause a DATAFLOW RTU that reads an analog signal as full scale to transmit the signal status as a 0 scale to another DATAFLOW RTU.
over a RS-485 serial link. The following paragraphs describe how individual blocks of the control board operate. 17.1.1 +5V REGULATOR: IC101 is a DC-to-DC converter which changes the VUNREG input voltage to +5VDC. The +5VDC value is set by resistors R101, R102, and R103 with FB = 2.50V (pin 13). This IC also contains an output comparator used to monitor system +5VDC voltage. This comparator shuts the system down if low power is detected to prevent abnormal system operation due to low voltage. 17.1.
passed through a low-pass filter (IC107) with a cut-off frequency of 1500 Hz. The purpose of this filter is to round-off the edges of the square wave input. 17.1.13 MODULATION INPUT. The data modulation for the DATAFLOW RTU is Bi-Phase M. The received data from the RF board is first run through a low-pass filter (IC107) to clean-up the wave. This signal is then squared-up by a comparator (IC107). This signal is then finally decoded by a software decoder in the microprocessor. 17.