The Precision Digital PDW90 Base Station is the starting piece to a rugged, customizable, point-to-multipoint wireless bridge. It offers a highly-flexible means of getting an analog, digital, or Modbus® signal from where you have it to where you need it. Modular input/output cards and expandable field units, available for the base station, and mean that the PDW90 can be customized to meet the needs of any wireless application.

The PDW90 is simple to order, simple to configure, and easy to trust with your application. A wireless survey tool is available for those installations that require a site survey for longer distances, making it easy to verify the setup will work the first time.

Field units accept analog, discrete, or Modbus® inputs and wirelessly broadcast it to the PDW90 base station. The base station can recreate these signals with its onboard RS-485 or analog and digital I/O cards. It can also be programmed to activate relays or output analog/digital signals to the field units. Just put the field units wherever there are process signals and the base station in the control room.

Fixed or remote antenna modules as well as a wide range of accessories are available, including mounting kits, antenna-related accessories, and repeaters. The antenna may be directly attached or remotely located. High gain directional antennae are also offered.


  • Rugged Plastic NEMA 4X Field Enclosure
  • Field or Wall Mounted
  • RS-485 Modbus Standard
  • Up to 16 Dual Input/Output Expansion Cards
  • Analog Input, Analog Output, Relay Output, and Digital I/O Cards Available

PDA3900 Yagi High Gain Antenna Accessory

PDA3900 Yagi Antennas

The PDA3900 yagi antennas are made to work with point-to-point and point-to-multi-point applications. These high gain antennas are ideal to use with Precision Digital’s PDW wireless series because they give you the flexibility of installing the antenna exactly where you need to bridge your point-to-point wireless process signals while keeping the PDW unit in a convenient location for monitoring. Each Yagi is factory tuned on a network analyzer for best power match and lowest VSWR, offering the best possible performance. The PDA3900 also comes complete with a mounting kit with stainless steel hardware.

Frequency: 900 MHz
Gain: 6 or 9 dBd (based on model)
Termination: N-Female connector
Mounting Kit: Included for 1 ¼" pipe
Dimensions: PDA3900-6Y-N: 17.125" (435 mm) x 6.875" (175 mm), PDA3900-9Y-N: 28" (711 mm) x 6.875" (175 mm)
Weight: PDA3900-6Y-N: 11.2 oz (318 g), PDA3900-9Y-N: 16.8 oz (476 g)

Extention Cable Accessory for Yagi Antenna

Extention Cable Accessory for Yagi Antenna

Mounting the Yagi Antenna

PDA3900 Pipe Mounting


PDA3900 Dimensions


Maximum Connected Field Units

32 field units

Network ID

Programmable: 0 - 99

Programming Methods

Via PC with PDW Manager software


24 VDC ±10%, 36 W max, 2.4 W min; Power consumption is dependent on type and number of modules installed

Non-Volatile Memory

All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.


Operating temperature range: -40 to 65°C; Storage temperature range: -40 to 85°C; Relative humidity: 0 to 90% non-condensing


Removable screw terminal blocks accept 12 to 22 AWG wire.

Peak Antenna Gain

2.15 dBi ± 1.0


15.75" x 11.81" x 7.03" (40 cm x 30 cm x 17.9 cm) (W x H x D);
NEMA 4X; Thermoplastic Polyester; Color: Gray

Tightening Torque

Screw terminal connectors: 5 lb-in (0.56 Nm)

Shipping Dimensions

17" x 14" x 9" (43.2 cm x 35.6 cm x 22.9 cm) (W x H X D)

Shipping Weight

6.5 lbs (2.95 kg)


3 years parts & labor

Wireless Radio


900 MHz


500 ft (152.4 m) indoor, 1 mi (1.61 km) outdoor (line-of-sight)


AES 128-bit encryption available using PDW Manager software

Interference Reduction

Frequency Hopping Spread Spectrum (FHSS)

Power Output

24 dBm (250 mW)


-101 dBm

PDW Manager Software

System Requirements

Microsoft® Windows® XP/Vista/7/8/10


USB 2.0 (Standard USB A to Micro USB B)


Configure devices one at a time

RS-485 Modbus® RTU Serial Communications




Removable screw terminal connector

Max Distance

3,937' (1,200 m) max

Baud Rate

1200 – 57,600 bps

Transmit Time Delay

Programmable between 0 and 199 ms


8 bit (1 start bit, 1 or 2 stop bits)


Even, Odd, or None with 2 stop bits

Modbus Timeout

0.5, 1, 2, 3, 4, 5 seconds; user selectable


Configure your wireless system:

Get the base station, modules, and field units you need all in one place!

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