| ECD » Line
Drives » DME
 |
DME
Digital Multidrop Extender
RS-232 Line Driver |
Features/Benefits
- Interface
- RS-232 and Dedicated 4-Wire
- Data Rates
- Synchronous to 64Kbps
- DCE/DTE
Selectable RS-232 port
- Point-to-Point
or Multi-point Operation up to 32 drops
- Timing -
Internal or External
- Low EMI (Electro Magnetic Interference) -
Superior Signal Fidelity
- Data Carrier
Detect (DCD) - Constant or Switched Carrier operation
- Contention
- Selectable for RTS or Data
- Anti-Streaming
- Enable or Disable
- RTS/CTS
- Variable delay settings
- 120/220VAC
switch selectable
- Approvals
UL and CSA
Description
The Digital
Multidrop Extender (DME) utilizes state of the art digital CMOS
technology to provide a feature filled product at a very affordable
price. The DME transmits and receives data bi-directionally at
data rates up to 64kbps. The unit is designed for synchronous
Point-to-Point or Multi-point operation.
Applications
that benefit from the DME are Polled / Contention networks operating
on Switched or Constant Carrier Operation. The DME allows the
user to set up a fully digital multipoint network over a campus
environment by connecting directly to the back of a CSU/DSU. In
this scenario, clocking is provided by the DDS while the DME transmits
digital data bi-directionally as the DTE devices are polled from
the Host site.
Substantial
cost savings are derived by eliminating the need for a Time Division
Multiplexer (TDM) or Digital Sharing Device (DSD) behind the CSU/DSU.
Additionally, analog Line Drivers are no longer required from
the subchannel ports of the TDM or DSD to remote DTE devices.
Installation
is fast and simple by setting the internal DCE/DTE switch, Clocking,
Constant or Switched Carrier Operation and the Contention Mode
of RTS or Data.
The DME
provides optional Anti-Streaming circuitry. Once enabled, Anti-Streaming
will automatically remove a defective DTE from service if the
Data / Control criteria is present for the user defined selection
period.
The DME
is housed in a sturdy metal enclosure and operates on 110/220VAC.
The DME
has a three year warranty and a 24 hour turnaround on warranty
repairs.
|
|
Specifications
| Application |
Full
Duplex Synchronous Point-to-Point or Multi-point Digital Data
Transmission |
| Capacity |
Up
to 32 drops per site |
| Interface |
RS-232
and 4-Wire EMI reduced RS-485 |
| Data
Rates |
2.4k
to 64Kbps with 3/4 baud rates |
| Driving
Distance |
Dependent
on data rate and wire gauge |
| Switches |
DCE/DTE
for RS-232 port |
| RS-232
Physical Interface |
Female
DB-25 Connector |
| 4-Wire
Physical Interface |
(2)
RJ-45's and 4-Position Terminal Block |
| Line
Requirements |
Four
Wire private, unloaded with no bridge taps |
| Power
Source |
100-120
to 200-220VAC @10%, 50/60Hz, 0.16/0.08A, external 110/220
volt select switch, IEC Power Inlet, (2) 5mm Fuses |
| Approvals |
UL
and CSA |
| Environmental |
Operating
Temperature . .32º to 122º F (0º to 50º
C)
Relative Humidity..
. . . . . .5 to 95% Non-Condensing
Altitude. . .
. . . . . . . . . . ... .0 to 10,000 feet |
| Dimensions |
Height
. . . . . . . . . . . . . . .1.75 inches (4.44cm)
Width . . . .
. . . . . . . . . . . 13.35 inches (33.09 cm)
Length . . .
. . . . . . . . . . . 9.00 inches (22.86 cm) |
| Weight |
2
pounds (0.914Kg) |
| Warranty |
Three
Years, Return to Factory |
| Ordering
Information |
Model:
DME
Part: 106000
Description: Digital Multidrop Extender |
| Included
with each unit: |
1)
Operations Manual
2) U.S.A. Grounded
Power Cord, Part #713015 |
| Options |
1)
Optional Power Cords
....A)
United Kingdom, Part # 713016
....B)
Continental Europe, Part # 713017
....C)
Other: Specify Country on Purchase Order
OPTIONAL ACCESSORIES
2) Spare Data
Center Fuses
....A)
160ma Fuse, Qty (2) Part # 714000
....B)
80ma Fuse, Qty (2) Part # 714001 |
|
|
ECD Home
Bomara Homepage