Industrial Wireless / Wireless Radio I/O Extender

Wireless Radio I/O Extender

DD1000/SRM/2.4 or DDAA1000/SRM/2.4

The Data-Linc Group DD1000/SRM and DDAA1000/SRM wireless multiplexers offer applications the ability to transmit 4-20mA and/or discrete signals without the cost or inconvenience of adding wires or additional devices.

The DDAA1000/SRM combines an analog/discrete signal digitizer with Data-Linc Group’s SRM industrial grade license-free wireless modems. The result is a simple to implement solution for I/O signal transmission.

Each DDAA multiplexer has eight discrete inputs and eight outputs, as well as eight analog (4-20mA) inputs and outputs.

The DD1000/SRM is as described above but offers only the discrete function.

The radio section of the multiplexers incorporate the license free 2.4 GHz-2.4835 spread spectrum ISM (industrial/scientific/medical) band technology used by the Data-Linc Group SRM Family of radio modems. (Also available for the 900 MHz band.) These units are capable of wireless transmission up to 15 miles (24 km) with line-of-sight and an omni directional antenna.

In the event of a communications link failure, discrete outputs will default to open, while analog outputs will default to 4 mA.

Features:

  • Easy to implement
  • Field configurable
  • Automatic restart
  • No special software required
  • Point-to-point or point-to-multipoint data acquisition and control
  • Inexpensive to install—no wires to route or ditches to dig

DATASHEET DOWNLOAD


Applications:

  • Mining
  • Water/Wastewater- monitor tank levels via 4-20 mA analog signals and control pump contact closure via discrete signals
  • Most types of discrete 4-20 mA applications

DD1000/SRM/2.4 and DDAA1000/SRM/2.4 Specifications

System Configurations

Point-to-point, point-to-multipoint; 1 Master multi-dropped with up to 8 addressable single channel Remotes

Channel Functions

  • Analog. 4-20mA standard, 24VDC max. Internal 8 Bit
  • A/D yields 2% accuracy of 4-20 signals
  • Discrete Input. Dry contact closure-switch closure detection
  • Discrete Output. Open collector— sync to ground 100mA per
  • channel 12-24VDC

Operating Environment

  • Standard. 32° to 140° F (0° to 60° C)
  • Humidity. 0 95% non-condensing humidity

Connections

  • RF Antenna: Standard thread SMA female.
  • Supplied bench test 0dB whip antenna.
  • Optional external omni directional or yagi antennas available.

Analog. (4-20mA input and output):

  • 9 Position pluggable terminal blocks
  • Pluggable terminal blocks standard wire size 12-26 AWG

Digital. (Contact closure input and output):

  • 9 position pluggable terminal blocks
  • Pluggable terminal blocks standard wire size 12-26 AWG

Power. Barrel jack (2.0 mm center, 6.5 mm barrel)

  • 120 to 12 VDC barrel jack transformer included

Configuration.

  • 6 pin mini-din. RS232 port used for reconfiguration of RF and
  • processor channel parameters.
  • Supplied programming cable and Software CD with each Master unit.

Indicators

  • Power.
  • CD (Carrier Detect)
  • Tx (Transmit Data)
  • Rx (Receive Data)
  • Status (Error Status, Master unit only)

Voltage and Current

  • Voltage: 12VDC nominal, Min 10.5, Max 18VDC
  • Current: 160mA idle, 660mA Peak on Transmit

Enclosure

  • Standard. 18-gauge steel with mounting flanges
  • Weight. 4 lb (1.82 kg) See diagram below.
  • 2.4 GHz Versions of DD1000/SRM and DDAA1000/SRM

DD1000/SRM/M/2.4GHz (Master unit)

  • Discrete signal multiplexer with integral radio modem:
  • 2.4-2.4835 GHz license free radio modem with 8 discrete Inputs and Outputs.

DD1000/SRM/R/2.4GHz (Remote unit)

  • Discrete signal multiplexer with integral radio modem:
  • 2.4-2.4835 GHz license free radio modem with 8 discrete Inputs and Outputs.

DDAA1000/SRM/M/2.4GHz (Master unit)

  • Discrete and Analog signal multiplexer with integral radio modem:
  • 2.4-2.4835 GHz license free radio modem with 8 discrete Inputs and Outputs as well as 8 analog Inputs and Outputs.

DDAA1000/SRM/R/2.4GHz (Remote unit)

  • Discrete and Analog signal multiplexer with integral radio modem:
  • 2.4-2.4835 GHz license free radio modem with 8 Discrete Inputs and Outputs as well as 8 analog Inputs and Outputs.