DD1000
DDAA1000

Discrete/Analog Wireless Multiplexer
for the 900 MHz ISM Band

Features Easy to implement Field configurable Automatic restart No special software required Point-to-point or point-to-multipoint 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 4-20 mA 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 (4-20 mA) inputs and outputs.

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

The RF section of the multiplexers incorporate the license-free 902-928 MHz spread spectrum ISM (industrial/scientific/medical) band technology used by the Data-Linc Group SRM Family of radio modems. These units are capable of wireless transmission up to 25 miles (40 km) with line-of-sight and an omni directional antenna. (Also available for the 2.4 GHz band.)

In the event of a communications link failure, discrete and analog are software configurable.

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) print version of the Data Sheet for the DD1000 & DDAA1000 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 and DDAA1000 900 MHz Band 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. 4-20 mA standard, 24VDC 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.
12-24 VDC. 100mA 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 0 dB whip antenna
Optional. External omni directional or yagi antennas available.

Analog (4-20 mA input and output): 9 position pluggable terminal blocks
Pluggable terminal blocks standard wire size 12-26 AWG (DDAA100 only)

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

Power: 2pin 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: 160 mA idle, 660 mA peak on transmit

Enclosure
Standard. 18-gauge steel with mounting flanges
Weight
4 lb (1.82 kg) See diagram below.

900 MHz Versions of DD1000 and DDAA1000

DD1000
Discrete signal multiplexer with integral radio modem:
902 to 928 MHz license-free radio modem with 8 discrete Inputs and Outputs.

DDAA1000
Discrete and Analog signal multiplexer with integral radio modem: 902 to 928 MHz license-free radio modem with 8 discrete Inputs and Outputs as well as 8 analog Inputs and Outputs.