DD1000/2.4
DDAA1000/2.4

Discrete/Analog Wireless Multiplexer for the
2.4 to 2.4835 GHz ISM Band

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

The Data-Linc Group DD1000 and DDAA1000 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 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 DD1000/2.4 is as described above but offers only the discrete function.

The RF 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.

Please consult with a Data-Linc Group Applications Specialist by phone at (425) 882-2206, send your proposed application diagram to us via Fax at (425) 867-0865 or for review.

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 and/or 4-20 mA applications

Download pdf (523K) the printable version of the Data Sheet for the DD1000/2.4 & DDAA1000/2.4 Discrete/Analog Wireless Multiplexer. (Requires Adobe Acrobat Reader to open.)
Download pdf (371K) technical article file Discrete/Analog Multiplexer, "Wireless Communication System for Stray Current Interference Testing"

DD1000/2.4 and DDAA1000/2.4 Specifications

Included
Software CD & User Documentation
RS232 configuration cable
Test antenna. 0dBd
12 VDC wall power supply

System Configurations
Point-to-point, point-to-multipoint; (1 Master with up to 8 Remotes)

Channel Functions
Analog. 4-20mA standard, 24 VDC max. Internal 8 Bit
A/D yields 2% accuracy of 4-20 signals
Discrete Input. Self sensing open/close circuit detection.
Discrete Output. Open collector— sink to ground. 12 to 24 VDC.
100 mA max per channel.

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

Connections
RF Antenna: Standard thread SMA female. 50 Ω
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 (DDAA1000/2.4 only)

Digital. (Contact closure input and output):
9 position pluggable terminal blocks
Pluggable terminal blocks standard wire size 12-26 AWG

Power. 2 pin terminal block

Indicators
Power.
CD Carrier Detect
Tx Transmit Data
Rx Receive Data
Status Error Status

Voltage and Current
Voltage: 12 VDC 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 and DDAA1000

DD1000/2.4GHz
Discrete signal multiplexer with integral radio modem:
2.4-2.4835 GHz license free radio modem with 8 discrete Inputs and Outputs.

DDAA1000/2.4GHz
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.