Related Manuals for ELPRO 905U-K
Summary of Contents for ELPRO 905U-K
- Page 1 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.au...
- Page 2 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.
- Page 3 January 2002 FCC Notice: 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: This device may not cause harmful interference and This device must accept any interference received, including interference that may cause undesired operation.
- Page 4 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. The products are designed to operate in the presence of noise and interference, however in an extreme case, radio noise and interference could cause product operation delays or operation failure.
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Page 5: Limited Warranty, Disclaimer And Limitation Of Remedies
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. -
Page 6: Table Of Contents
905U-K Radio Telemetry Module User Manual 905U-K Radio Telemetry Module USER MANUAL LIMITED WARRANTY, DISCLAIMER AND LIMITATION OF REMEDIES -------------5 OVERVIEW----------------------------------------------------------------------------------------8 ..................8 VAILABLE ODELS ....................8 NPUT IGNALS ....................9 OWER UPPLY ..................9 ADIO RANSMITTER ....................9 ONFIGURATION OPERATION ------------------------------------------------------------------------------------ 10 .................. - Page 7 905U-K.MAN Rev. 1.1 January 2002 3.4.1 External Power ..................24 ................24 NPUT IGNAL ONNECTIONS 3.5.1 Digital/Pulse Inputs ................. 24 3.5.2 Shaft Encoder Connections ..............26 3.5.3 RS232 serial port ..................26 CONFIGURATION----------------------------------------------------------------------------- 28 I/O M ....................29 APPING ................. 29...
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Page 8: Overview
If you have not used 905U modules before, please read the 905U User Manual prior to reading this manual. The 905U-K module is a monitoring only unit - that is, it will only accept input signals and does not provide output signals. The 905U-K has an internal radio transmitter; it does not have a receiver to receive messages from another module. -
Page 9: 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. The 905U-K units provide an internal alarm on low battery voltage - this alarm may be transmitted by radio for warning purposes. -
Page 10: Operation
0.5 seconds to check if a timed update transmission is due to be sent. Normal operation of the 905U-K is indicated by a brief flicker of the OK LED light on the front panel approximately every 10 seconds. -
Page 11: 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. -
Page 12: Analogue Inputs
• 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. A shaft encoder is a transducer that measures level or displacement, and has two pulse signals to indicate change of level and direction of change. -
Page 13: Setpoint Status
The Low Battery Voltage Alarm is a configurable set point determined by the type of battery used to power the 905U-K. If the voltage of battery supply falls below the set point voltage, the internal battery voltage alarm will turn on. -
Page 14: Communications Failure
Note that the maximum output reset time at the 905U is 32 minutes, so the update time for the 905U-K input must be less than this. It is generally a good idea to set the update time to less than half of the reset time. Then, the 905U must fail to receive two consecutive update messages - it is possible to miss one update message because of random noise, but two consecutive failures means that there is a system failure. -
Page 15: How Far Will The Radio Transmit
• Maximum radio transmitter power allowed in the country The transmitter power level of each 905U-K is set in the factory to the maximum power allowed in the country of sale. The maximum output power of the 905U-K is 1 Watt, ©... -
Page 16: Calculating Power Consumption
Example:- An application has one digital input, one pulse input and one analogue input. It is powered by internal battery supply and the analogue input uses the 905U-K loop supply. Each radio message is configured to transmit two times. The total power consumed = power for transmissions + power for analogue loop supply + pulse input +... - Page 17 905U-K.MAN Rev. 1.1 January 2002 Total messages for digital input 4 + 364 + 32 Pulse input Update time 1 day Sensitivity 50 Average pulse rate is 1 pulse per hour, with peak rate of 20 per hour, for 10 hours, three times per year.
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Page 18: Hardware Installation
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. -
Page 19: How To Mount The 905U-K
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. - Page 20 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).
- Page 21 OBSTRUCTIONS INSTALL MORE THAN ON STAKE The 905U-K normally produces 1.0 Watt of radio power when an external DC power supply is used. FCC regulations allow this power may be boosted to a maximum 4.0W by using a higher gain antennas. These higher gain antennas may also be used to compensate for coaxial cable loss.
- Page 22 YAGI antennas, horizontal polarisation is recommended. If there are more than two 905U-K modules transmitting to a common 905U module, or there is dipole or colinear used in the system, then the YAGI antennas should have vertical polarisation.
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Page 23: Connection Plug
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. CABLE CLAMP (ONE MOUNDING SPLIT &... -
Page 24: Power Supply Installation
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”. - Page 25 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. © © ELPRO Technologies Pty Ltd...
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Page 26: Shaft Encoder Connections
The serial port is a 9 pin DB9 male and provides for connection to a terminal or to a PC for configuration, field testing and for factory testing. Communication is via standard RS-232 signals. The 905U-K is configured as DCE equipment with the pinout detailed below. - Page 27 Not Used. Not Used. The DTR signal must be connected to the 905U-K to enable communications and “wake up” the microprocessor. This means that the DTR wire must be connected - the PC does not need to control DTR. When communications is established, the green LED will light continuously.
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Page 28: Configuration
Each 905U-K has a unit address and a secondary address. Up to eight 905U-K modules can use the same system address. If you enter the same unit address for more than one 905U-K, the configuration software will automatically increase the secondary address. The default description of a 905U-K module is 505-2#10_1 where 10 is the unit address and 1 is the secondary address. -
Page 29: I/O Mapping
AO2 of the same module. The setpoint status of the 905U-K is mapped (inverted) to DO3 of 905U#14, using 905U#13 as a repeater. The 905U-K AI is also mapped to AO1 of this module. That is, the AI is mapped twice. -
Page 30: Digital Inputs
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. -
Page 31: Analog Setpoints
1 and 127 seconds. If a zero value is entered, then an analogue measurement will be made as soon as the loop supply is turned on. If both the sample time and warmup time are set to zero, then an analogue measurement will be taken on every 905U-K cycle (every 0.5 sec). - Page 32 905U-K Radio Telemetry Module User Manual If either pulse input has an input rate of more than 10Hz, then the Fast Pulse Input option should be selected from the Pulsed Inputs selection. If the pulse inputs are connected to a...
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Page 33: Number Of Transmissions
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 3.5.4 for cable connections) • From the Utilities menu, select “Serial Port Setup”... -
Page 34: Loading Configuration From A Module
905U-K Radio Telemetry Module User Manual • Select the unit to be configured from the left-hand menu • Click on the “Program Unit” button. You will be asked to confirm if the module already has a different system or unit address. -
Page 35: Troubleshooting
If the OK LED does not flash, a flat battery condition or an internal failure may exist. If the 905U-K module is located outside, then it will be difficult to see when the LED indicators are on. Remove the front lid of the 905U-K to see the LED's better. -
Page 36: Specifications
A series of 1 and 0 data bits is transmitted. This feature is not recommended for 905U-K-B versions as it will significantly reduce the life of the batteries. To do radio path testing, refer to the 105 User Manual. - Page 37 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 bayonet Suitable for 0.75 mm...
- Page 38 905U-K Radio Telemetry Module User Manual modules as repeaters, Antenna Connector SMA coaxial Serial Ports RS232 Port DB9 female DCE 9600 baud, no parity, 8 data bits, 1 stop bit Data transmission change-of-state Update time configurable 10 secs - digital inputs...
- Page 39 905U-K.MAN Rev. 1.1 January 2002 System Parameters Network Configurations Max. number of 905U-K 905U-K is compatible with 905U inputs >20,000 radio telemetry units which may 905U-C modules be used as repeaters, provision of used as receivers. outputs, or as network master...
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