MDL500 FSK Wire Modem

MDL500 FSK Wire Modem for data over private lines or any dedicated wire pair.

The MDL500 incorporates a special filter section in the FSK receiver. This filter eliminates out-of-band electromagnetic interference (EMI). As a result, the MDL500 can utilize most untwisted and unshielded wires with error-free operation.

When the MDL500 FSK modem is configured for multi-point operation, the carrier is controlled by the RTS line of the connected addressable device. The turnaround time (RTS to send delay time) is only 20 milliseconds, permitting high system data throughput. The MDL500 has unique circuitry that stabilizes the received carrier rapidly and eliminates any false triggering by the Master’s receiver when any Remote’s transmitter is turned on or off.

The MDL500 FSK series is factory pre-configured for simple installation. This series range is up to eight miles, based on 24-gauge wire. Larger wire gauges can increase range.

The MDL500 FSK is ideal for applications where only power lines connect the locations requiring data transfer. It can be used to communicate data over sliding contacts with high reliability, including slip rings and rolling wheels, as well as shoes on conductor bars.

The MDL500 with high voltage interface and power line isolators permits full duplex data transmission over in-use power lines at up to 9600 baud. Line voltage and current can be up to 600 volts and 200 amps. Data-Linc's PLI500 Power Line Isolators block outside noise produced by the power grid from interfering with data reliability.

Industrial Applications

• Stacker cranes
• Material handling equipment
• Rotating molds or any mobile robotic equipment
• Hydroelectric generators
• Railroad signaling controls
• Mine safety monitoring
• Flow meter pulse train transmission
• Various manufacturing applications

MDL500 FSK Versions

MDL/MRM (Medium Range Master)
<20,000 ft or 6 km, 2 wire

MDL/MRR (Medium Range Remote)
<20,000 ft or 6 km, 2 wire

MDL/LRM (Long Range Master)
<40,000 ft or 15.24 km, 4 wire

MDL/LRR (Long Range Remote)
<40,000 ft or 15.24 km, 4 wire

Click to download (pdf file 84K) a print version of this MDL500 FSK wire modem document. (Requires Adobe Acrobat to read.)

MDL500 FSK Series Specifications

Data Format

Standard. RS232C
Optional. AE422/485 (4/2 wire)

Operation

Two-wire, full duplex or half duplex controlled carrier, asynchronous data
Four-wire, long range version available

Mode

Point-to-point or multi-point option

Data Transmission Speed

Up to 9600 baud

Modulation

Frequency shift key (FSK); carrier signal transformer and capacitively isolated

Interface

DTE/DCE jumper selectable; Female DB-25 connector for RS232C; two position pluggable terminal block for carrier; 2.5 mm x 5.5 mm barrel jack (center positive) for 24 VDC power

Distance

Two-conductor wire. Up to 20,000 feet (6.1 km)
Four-wire, long-range unit. Up to 40,000 feet (12.2 km)

Power

21 to 28 VDC or 120 VAC (wall transformer provided)

Operating Environment

Temperature Range. 32° to 140° F (0° to +60°C)
Humidity. 0 to 95%, non-condensing

Weight

3.5 lbs (1.6 kg)

Enclosure

Standard. 16-gauge steel with mounting flanges
Dimensions.  

Specifications subject to change without notice.
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P/N 155-10003-002A

Data-Linc Group
3535 Factoria Blvd. SE, Suite 100 • Bellevue, WA 98006 USA
Tel (425) 882-2206 • Fax (425) 867-0865 •