Precision Digital Corporation PDW90 Series Instruction Manual Download Page 13 | Manualshive

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PDW90 Point to Multi-Point Wireless Instruction Manual

13

Modbus RTU Serial Communications

The PDW90 base station acts as a simple pass-through for Modbus communications. As such, multiple

Modbus enabled devices may transmit and receive wirelessly using the base station.

Figure 9. Base Station Three- and Five-Wire RS-485 Modbus Connection

Figure 10. Base Station Multiple Device RS-485 Modbus Connection

Notes:

1. Termination resistors are optional and values depend on the cable length and characteristic im-

pedance. Consult the cable manufacturer for recommendations.

2. Use shielded cable, twisted-pairs plus ground. Connect ground shield only at one location.

Shield

Twisted-Pair

Shield

Twisted-Pair

(PDW90 Base Station)

(PDW90 Base Station)

R

R

R

R

Shield

Twisted-Pair

(PDW90 Base Station)

R

R

www.

.com

[email protected]

1.800.561.8187

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Summary of Contents for PDW90 Series

Page 1: ...gramming Software and Onboard USB Range 1 Mile Line of Sight 500 Ft Indoor Analog Digital and RS 485 Inputs and Outputs Remote or Attached Directional and Omnidirectional Antennas Available Field Unit...

Page 2: ...sonal injury or property loss Anyone using this product for such applications does so at their own risk Precision Digital Corporation shall not be held lia ble for damages resulting from such improper...

Page 3: ...d Configuration 29 Programming the Field Units 30 Field Unit Setup Menu 31 Programming the Field Units with PDW Manager 34 Troubleshooting 37 Mounting Dimensions 40 PDA6963 Stainless Steel Pipe Mounti...

Page 4: ...ons asked A wireless survey tool is available for those installations that require a site survey for longer dis tances making it easy to verify the setup will work the first time Field units accept an...

Page 5: ...DA3900 12 N PDW 900 MHz Antenna 1 2 NPT PDA3900 34 N PDW 900 MHz Antenna 3 4 NPT PDA3900 6Y N Yagi Antenna 6dB PDA3900 9Y N Yagi Antenna 9dB PDA3120 S RP SMA M F Antenna Cable 20ft PDA3140 S RP SMA M...

Page 6: ...open circuit until wireless units are reconnected Input Impedance Voltage ranges greater than 110 k Current ranges less than 220 HART Transparency Analog input will not interfere with existing HART co...

Page 7: ...e 40 for mounting space requirements Signal Con nector Tight ening Torque 2 2 lb in 0 25 Nm Shipping Dimensions 17 x 14 x 9 43 2 cm x 35 6 cm x 22 9 cm L x W X H Shipping Weight 5 lbs 2 27 kg Warranty...

Page 8: ...table Safety Information Caution Read complete instructions prior to installation and operation of the device Warning Read all product labels completely and follow all instructions and requirements li...

Page 9: ...ts the unit Turn the screw an additional 1 4 to 1 2 turn to secure the cover Caution Excess torque may damage the threads and or wrench FCC Notice Contains FCC ID MCQ XB900HP The enclosed device compl...

Page 10: ...w terminal blocks on a fully loaded PDW90 base station elec tronics board This diagram shows the board loaded with four relay modules four digital I O modules four analog input modules and four analog...

Page 11: ...input or Mod bus register The signal can be transmitted to any device scaled to read a 4 20 mA signal as shown at right The analog output is internally powered no external power supply is required Dig...

Page 12: ...capacitor RC networks assembled by the user or purchased as complete assemblies Refer to the following circuits for RC network assembly and installation Figure 7 AC and DC Loads Protection Choose R a...

Page 13: ...S 485 Modbus Connection Figure 10 Base Station Multiple Device RS 485 Modbus Connection Notes 1 Termination resistors are optional and values depend on the cable length and characteristic im pedance C...

Page 14: ...al and one external Static electricity can damage sensitive components Observe safe handling precautions for static sensitive com ponents Use proper grounding procedures codes Warning Observe all safe...

Page 15: ...and 2 Wire Transmitter from Same Power Supply The PDW30 wireless units may be powered from the same power supply that powers the 2 wire loop powered transmitter assuming that the supply provides enoug...

Page 16: ...n the first device was 0 10 V and the input value was 5 V the second device would output 12 mA Connect the mA OUT terminals to a device scaled to read a 4 20 mA signal The analog output is internally...

Page 17: ...ld Unit Three and Five Wire RS 485 Modbus Connection Figure 18 Field Unit Multiple Device RS 485 Modbus Connection Notes 1 Termination resistors are optional and values depend on the cable length and...

Page 18: ...ammed using PDW Manager programming software PDW Manager can be found on the included CD or downloaded from Once the software is running power the unit using a 24 VDC power supply and connect the base...

Page 19: ...ver See Programming the Field Units on page 30 for details on field unit pro gramming After the base station has been connected to PDW Manager see page 18 field units can be connected to it from the R...

Page 20: ...nished modifying any of these settings click the Save Settings button to write your changes to the device If you have made changes that have not yet been saved and would like to load the saved setting...

Page 21: ...ped to remote analog outputs or Modbus registers Once you have modified the module s settings click the Save Module Configuration button to save these settings to the base station If you have made cha...

Page 22: ...ation If you have made changes to the module that have not been saved and would like to load the saved set tings from the base station click the Read Settings from Hardware button If you would like to...

Page 23: ...ngs to the base station If you have made changes to the module that have not been saved and would like to load the saved set tings from the base station click the Read Settings from Hardware button If...

Page 24: ...have made changes to the module that have not been saved and would like to load the saved set tings from the base station click the Read Settings from Hardware button If you would like to reset the se...

Page 25: ...facility or the devices con nected to it in order to make future programming easier Analog Input Each field unit s analog input may be programmed to accept a 4 20 mA 0 10 V 0 5 V or 1 5 V signal Once...

Page 26: ...button to save these settings to the field unit The IO Mapping section will show to what if any device the analog input has been mapped The Moni toring section at the bottom may be used to view the c...

Page 27: ...Save Configuration button to save these settings to the field unit The IO Mapping section will show to what if any device the digital I O has been mapped The Monitoring section at the bottom may be u...

Page 28: ...wireless units Modbus registers depending on the type of Modbus device it may be necessary to provide either the register address or the register number PDW Manager shows the reg ister address of inpu...

Page 29: ...d settings from the base station click the Read Settings button The wireless field units must share identical encryption keys in order to communicate with the base sta tion so be sure to enter the sam...

Page 30: ...utton Description Display Status Menu Enter or exit the de vice menu RSSI Received Signal Strength Indicator Indicates the wireless signal strength between wireless devices on a scale of 1 to 10 Enter...

Page 31: ...ange the device password PASSWORD 0 OFF Displays the current device password press enter to change 0000 9999 Password can be any number from 0001 to 9999 0000 disables BACK TO SETUP MENU Return to the...

Page 32: ...nit connected to the point to multipoint wire less network The Modbus address can be any number between 001 and 247 This address must be unique among all field units on the same Network ID This addres...

Page 33: ...een made while programming the field unit and it is unclear where the error occurred the best option may be to perform a factory reset of the device and begin again Display Signal I O and Digital I O...

Page 34: ...loaded from Once the software is running power the unit using a 24 VDC power supply and connect the device to the PC using the provided USB cable Note Units must be powered externally prior to program...

Page 35: ...ibration tabs The IO Testing tab allows you to perform diagnostics and testing on the units Note The field units are factory calibrated prior to shipment to read analog inputs in milliamps and volts d...

Page 36: ...information click Save Settings If you have made changes that have not been saved and would like to load the saved settings from the base station click the Read Settings button The base station and fi...

Page 37: ...y separated will not have as strong of a connection If communicating over distance of miles con sider installing PDW30 RNA repeaters or a high gain directional antenna Multiple wireless devices in the...

Page 38: ...mote Units list Devices have mismatched net work IDs Devices will not connect if they do not have the same network ID Verify that all devices share the same network ID Multiple field units have same M...

Page 39: ...used to charge a smartphone should work Other Issue If you are experiencing a symptom not listed here or the suggested troubleshooting steps do not alleviate your problem please attempt to restore the...

Page 40: ...Station Dimensions Side View Figure 21 Field Unit Dimensions Front View Figure 22 Field Unit Dimensions Side Cross Section View Note The supplied conduit plug may extend up to 0 6 in 15 mm from the co...

Page 41: ...Point Wireless Instruction Manual 41 PDA6963 Stainless Steel Pipe Mounting Kit for Field Units Figure 23 PDA6963 Stainless Steel Pipe Mounting Kit for Field Units Pipe PDA6963 www com information itm...

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