User Manual 905U- K Radio Telemetry Module ELPRO Technologies Pty Ltd, 9/12 Billabong Street, Stafford Q 4053, Australia. Tel: +61 7 33524533 Fax: +61 7 33524577 Email: sales@elpro.com.au Web: www.elpro.com.
905U-K Radio Telemetry Module User Manual Thank you for your selection of the 905U-K module for your telemetry needs. We trust it will give you many years of valuable service. ATTENTION! Incorrect termination of supply wires may cause internal damage and will void warranty. To ensure your 905U-K enjoys a long life, double check ALL your connections with the user’s manual before turning the power on.
905U-K.MAN Rev. 1.1 FCC Notice: January 2002 905U-K Wireless IO Module This user’s manual is for the ELPRO 905U-K wireless module. This device complies with Part 15.247 of the FCC Rules. Operation is subject to the following two conditions: 1) This device may not cause harmful interference and 2) This device must accept any interference received, including interference that may cause undesired operation. This device must be operated as supplied by ELPRO Technologies.
905U-K Radio Telemetry Module User Manual Important Notice ELPRO products are designed to be used in industrial environments, by experienced industrial engineering personnel with adequate knowledge of safety design considerations. ELPRO radio products are used on unprotected license-free radio bands with radio noise and interference.
905U-K.MAN Rev. 1.1 January 2002 Limited Warranty, Disclaimer and Limitation of Remedies ELPRO products are warranted to be free from manufacturing defects for a period of 2 years from the effective date of purchase. The effective date of purchase is decided solely by ELPRO Technologies.
905U-K Radio Telemetry Module User Manual 905U-K Radio Telemetry Module USER MANUAL LIMITED WARRANTY, DISCLAIMER AND LIMITATION OF REMEDIES-------------5 1 OVERVIEW------------------------------------------------------------------------------------------8 1.1 AVAILABLE MODELS....................................................................................... 8 1.2 INPUT SIGNALS.............................................................................................. 8 1.3 POWER SUPPLY ......
905U-K.MAN Rev. 1.1 3.4.1 3.5 January 2002 External Power .................................................................................... 24 INPUT SIGNAL CONNECTIONS ........................................................................ 24 3.5.1 Digital/Pulse Inputs.............................................................................. 24 3.5.2 Shaft Encoder Connections.................................................................. 26 3.5.3 RS232 serial port.........................
905U-K Radio Telemetry Module 1 User Manual OVERVIEW The 905U-K radio telemetry module is an economical solution for the remote monitoring of process signals. The 905U-K can connect to digital, pulse or analogue signals from process transducers, and transmit these signal values by radio. Although the 905U-K is intended to be simple in its application, it also provides many sophisticated features.
05U-K.MAN Rev. 1.1 January 2002 • Battery Low Voltage (digital signal set when internal battery voltage is low). 1.3 Power Supply The power consumption of the 905U-K is very small as it conserves power by reverting to “sleep” mode between transmissions. The 905U-K can be powered from an external 12V DC supply, or a 5.4 – 30V battery supply. The battery supply can be an external battery pack.
905U-K Radio Telemetry Module 2 User Manual OPERATION 2.1 Normal Operation Once configured using the 905U-K configuration software, the 905U-K module will normally be in “sleep” mode to conserve power. During sleep mode, the microprocessor controller powers down, and the analogue loop supply is turned off. The microprocessor will automatically “wake up” and revert to full operation if a digital/pulse input changes (on to off, or off to on), or every 0.
905U-K.MAN Rev. 1.1 January 2002 2.3.1 Digital Inputs A digital input can be an external digital input or an internal status input (setpoint status or low battery alarm). The 905U-K will transmit the value of the digital input whenever it changes from off to on or from on to off. A paralysis time may be configured to prevent another transmission within this time. The 905U-K will also transmit an update message if a message has not been transmitted for that input within an “update time”.
905U-K Radio Telemetry Module User Manual • Update message if the input value has not been transmitted within the update time (10 seconds - 5 days). • After each transmission, another transmission for that input is disabled for the paralysis time (0 – 127.5 sec). For the 905U-K-2, the two pulse inputs may be configured to control one count value, for use with quadrature and incremental shaft encoders.
905U-K.MAN Rev. 1.1 January 2002 Overview: • Measurements of the analogue signal are determined by the sample time and warm-up time • Analogue value is transmitted if the measured value has increased by the configured sensitivity amount since the last transmission • Analogue value is transmitted if the input value has not been transmitted within the update time (10 seconds - 5 days) 2.3.
905U-K Radio Telemetry Module User Manual If the battery is not replaced at the point of Low Voltage Alarm, at a point of 95% of the set point value, the unit will be permenently put into ‘sleep’ mode to prevent damage from over discharge to lead acid batteries. 2.3.6 Communications Failure The 905U-K cannot provide an indication that its transmitted messages have not been received successfully.
905U-K.MAN Rev. 1.1 January 2002 Probability of successf ul tr ansm ission 100% 90% 80% 70% 60% 50% 40% 30% T ran sm issio ns p er m essag e 20% 1 10 % 2 0% 0 1000 2000 3 3000 4 M essag es Per Ho ur 5 This assumes that the radio path is reliable and that there is no other radio users on this radio channel. If intermediate repeaters are used, then each repeated message should be counted as another message.
905U-K Radio Telemetry Module User Manual Quiescent 0.10 Each radio transmission Analogue input measurement (per measurement) Pulsed Input 1.0 W Radio 350 Externally powered transducer 10 Loop Powered Transducer - 12 mA average 22 Loop Powered Transducer - 20 mA average 30 0 - 10 Hz (Slow Pulsed Inputs) 0.0025 x f 10 - 1000 Hz (Fast Pulsed Inputs) 0.2 w-time = warm up time in seconds f = pulse frequency in Hz The overall power requirements may be calculated by using the above figures.
905U-K.MAN Rev. 1.1 January 2002 = No. of update messages per year = Total messages for pulse input 12 363 (approx) = 12 + 363 Analogue input Sample time 1 hour Sensitivity = 375 Warm-up time 5 secs 3% Update time 1 day Average changes of >3% is twice per day No. of change messages per year = 2 (twice per day) * 365 = No.
905U-K Radio Telemetry Module 3 User Manual HARDWARE INSTALLATION WARNING! All connections to the 905U-K must be SELV only. 110/220/240V mains power must NOT be connected to any input terminal of the 905U-K module! The 905U-K module is housed in a weatherproof enclosure with external power and input signals connected via a weatherproof connector at the bottom of the module. Wires of up to 0.75 sqmm may be connected by soldering to the female connector supplied with the unit.
905U-K.MAN Rev. 1.1 January 2002 3.1 How to mount the 905U-K The 905U-K module is housed in an IP66 weatherproof aluminium enclosure. To mount the 905U-K, remove the four screws in the top plate, and carefully remove the cover. The two mounting holes should now be visible. 905U-K It is important to effectively earth the unit to help prevent radio noise and static electricity damage. The preferred method is to earth the module using the mounting screws to connect to an earthed surface.
905U-K Radio Telemetry Module User Manual An antenna must be connected to each 905U-K module using the SMA connector that protrudes though the top of the enclosure. To achieve the maximum transmission distance, the antennas should be raised above intermediate obstructions so the radio path is true “line of sight”. Because of the curvature of the earth, each antenna will need to be elevated at least 5 metres above ground for paths greater than 5 km (3 miles).
905U-K.MAN Rev. 1.1 January 2002 Dipole and Colinear antennas. A unity gain dipole is the normal antenna for use on unlicensed channels. As it does not provide any gain, then the power transmitted from the antenna will be the same as the power out of the module. Dipole antennas are only available with a 15 feet of coaxial cable and SMA connector for mounting away from the 905U-K module. Dipole antennas should be mounted vertically, at least 1 metre away from a wall or mast.
905U-K Radio Telemetry Module User Manual gain of the antenna. Also note that YAGI antennas normally have a drain hole on the folded element - the drain hole should be located on the bottom of the installed antenna. The YAGI antennas may be installed with the elements in a vertical plane (vertically polarised) or in a horizontal plane (horizontally polarised). For a two station installation, with both modules using YAGI antennas, horizontal polarisation is recommended.
905U-K.MAN Rev. 1.1 January 2002 3.3 Connection Plug External power and input signals are connected using a weatherproof plug, provided with the module. For the 905U-K a 7 pin plug is used. The plug needs to be assembled as per the following diagram.
905U-K Radio Telemetry Module User Manual 3.4 Power Supply Installation 3.4.1 External Power The 905U-K module will accept an external supply of 5.4 - 30.0 volts DC. An external supply with a battery and battery charger is suitable. Negatively grounded or floating supplies are acceptable, however positively grounded supplies must not be connected. The 905U-K connects the negative supply (COMMON) to “ground”. Connect the external supply as per the following diagram. EXT SUPPLY 1A + ⊂ - ⊂ 905U-K 5.
905U-K.MAN Rev. 1.1 January 2002 Inputs do not have any surge protection. If the sensor or switch is mounted a long way from the 905U-K module, external isolation such as a relay may be required for surge protection.
905U-K Radio Telemetry Module 3.5.2 User Manual Shaft Encoder Connections COUNT DIRECTION DIN1 ⊂ DIN2 ⊂ PHASE 1 905U-K PHASE 2 GND DIN1 ⊂ DIN2 ⊂ 905U-K GND ⊂ ⊂ INCREMENTAL SHAFT ENCODER QUADRATURE SHAFT ENCODER Analogue input The analogue input has a positive and a negative terminal, and may be placed at any point in the current loop, as long as neither input rises more than 24V above COMMON or ground. A 24 VDC 30mA supply is provided for powering analogue loops.
905U-K.MAN Rev. 1.1 January 2002 Pin Name Dirn Function 1 - - Not Used. 2 RD Out Receive Data - Serial Data Output (High = 0, Low = 1) 3 TD In Transmit Data - Serial Data Input (High = 0, Low = 1) 4 DTR In Data Terminal Ready - used by 905U-K as a "wake-up" signal 5 SG - Signal Ground 6 - - Not Used. 7 - - Not Used. 8 - - Not Used. 9 - - Not Used. The DTR signal must be connected to the 905U-K to enable communications and “wake up” the microprocessor.
905U-K Radio Telemetry Module 4 User Manual CONFIGURATION The 905U-K module is configured by creating a configuration file on a PC and downloading to the 905U-K via the RS232 serial port. You will require the configuration software, and a serial cable - refer to the previous section. The configuration software is supplied as "free-ware" on the Product Catalog CD supplied with each order. The configuration software for the 905U-K is the same as the software for the 905U. Please read section 4.
905U-K.MAN Rev. 1.1 January 2002 4.1 I/O Mapping DIN1 Enter I/O mappings as per the 905U manual. AIN DO1 (DIN1 from #14) 905K 905U AO2 (AIN from #14) #3 #14 In the following example, a digital input at a 905U-K is mapped to DO1 of 905U#13. The analogue inout of the 905U-K is mapped to AO2 of the same module. DO3 (SP inv from #14) #4 905U AO1 (AIN from #14) The setpoint status of the 905U-K is mapped (inverted) to DO3 of 905U#14, using 905U#13 as a repeater.
905U-K Radio Telemetry Module User Manual occurred for this input within this time, then a transmission is set for this input after the update time has expired. Each input signal has its own timer - when a transmission occurs for this input (either a change transmission or an update transmission) the timer is reset to zero. If the timer reaches the Update Time value, then a update transmission occurs.
905U-K.MAN Rev. 1.1 January 2002 The sample time is the time period for each analogue input measurement. Between measurements, the 905U-K will operate in "sleep" mode. When the sample time has expired, the 905U-K will turn on the analogue loop power supply. After a further time, called the warmup the 905U-K will time, make a measurement of the input. The warmup time allows the transducer to stabilise and become accurate after the loop supply is turned on.
905U-K Radio Telemetry Module User Manual If the pulse inputs are connected to a shaft encoder (incremental or quadrature types), then the Shaft Encoder Inputs option should be selected. The pulse inputs also have a Sensitivity value. The pulse input sensitivity is the number of pulse increments since the last transmission to trigger another transmission.
905U-K.MAN Rev. 1.1 January 2002 4.7 Number of Transmissions This parameter allows you to select the number of transmissions for each message. For example, if 3 is selected, then each message will be transmitted three times. The time between each transmission will be a random time between 0.5 and 4 seconds. The valid choices for this option are 1 - 5. 4.8 Programming Configurations to Modules To programme a module : • Connect the cable from the PC’s serial port to the 905U-K serial port (see 3.5.
905U-K Radio Telemetry Module • Select the unit to be configured from the left-hand menu • Click on the “Program Unit” button. User Manual You will be asked to confirm if the module already has a different system or unit address. Each module will need to be programmed individually. 4.9 Loading Configuration from a Module Care should be taken when loading a configuration from a module. It is easy to lose the system address and unit address.
905U-K.MAN Rev. 1.1 5 January 2002 TROUBLESHOOTING System Problems Most problems relate to incorrect configuration, or radio path problems. Before installing the 905U-K module, "bench-test" its operation with the receiving 905U module alongside. If the 905U-K does not work properly in this test, it will not work properly installed. If problems are found, check the configuration.
905U-K Radio Telemetry Module User Manual Note : The OK LED will generally not light continuously unless the cable is in place and the configuration software is running. Read Inputs This option provides a display of the measured input signals in the 905U-K, both internal and external. Digital inputs (internal and external) are displayed as "ON" or "OFF", the pulse input accumulated count values are displayed and the analogue input value is displayed in mA.
905U-K.MAN Rev. 1.1 January 2002 General EMC approval FCC Part 15 Radio standards USA FCC Part 15.247 902 – 928 MHz, 1 Watt Canada RSS-210 Housing 160 x 64 x 36mm Industrial-grade painted aluminium IP66 I/O & Power Connection Weatherproof connector bayonet Suitable for 0.
905U-K Radio Telemetry Module User Manual modules as repeaters, Antenna Connector SMA coaxial Serial Ports RS232 Port DB9 female DCE Data transmission - digital inputs On change-of-state + Update time configurable 10 secs after update period - 5 days.
905U-K.MAN Rev. 1.1 January 2002 System Parameters Network Configurations Max. number of 905U-K inputs is >20,000 if 905U-C modules are used as receivers.
