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Ideal for private
lines or any dedicated wire pair
Versatile, reliable
and durable- designed especially for industrial applications
Exceptional immunity
to EMI/RFI
Easily interfaces with
PLCs, RTUs and PCs
Supports multidrop
polling applications and point-to-point installations
Factory or field
configured for your application ensuring trouble-free
installation
Protocol and baud rate
transparent
Optional long range
version available (up to 8 miles)
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MDL500 FSK Wire Modem for data over private lines or any dedicated wire
pair. |
The MDL500 Frequency Shift Key (FSK) series offers
maximum versatility and reliability. With simplex, half duplex and full duplex
capability, the MDL500 FSK series provides unsurpassed flexibility for private
lines or any dedicated wire pair (twisted or untwisted, shielded or unshielded)
industrial application. 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 shielded pair, most untwisted and
unshielded wires with error-free operation.
When the MDL500 FSK modem is configured for
multi-point, multi-drop 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.
DOVE/MDL500
"The DOVE" for data over PBX phone lines |
The Data Over Voice Encoder (DOVE)/MDL500
incorporates special filters which permit the transmission of data over
operating facility PBX telephone lines simultaneously–with normal voice
communications and no interference. The DOVE/MDL500 provides optimal data
communications throughout a facility by superimposing the data on in-place
wiring–thereby eliminating the need for costly data cable installation.
The DOVE/MDL500 can also be used to transmit
digital data over in-service current loop instrumentation lines. This is the
preferred method of adding data communication capability using existing wires
without disturbing the wires’ initial function.
Line Carrier Modem for data over power lines |
LCM/MDL
500
The LCM/MDL500 with high voltage interface and powerline 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 Group’s
PLI500 Power Line Isolators block outside noise produced by the power grid from
interfering with data reliability.
Industrial Applications
The MDL500 is ideal for industrial
automation systems requiring control of:
•
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 Series
Specifications
Data Format
Standard. RS232C
Optional. RS422/485
Operation
Two-wire, full duplex or half duplex controlled
carrier, asynchronous data
Four-wire, long range version available
Mode
Point-to-point or multi-drop 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. 32o to 140oF
(0o to +60oC)
Humidity. 0 to 95%, non-condensing
Enclosure
Standard. 16-gauge steel with mounting flanges
Dimensions. See drawing
Weight
3.56 lbs (1.62 kg)
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