ME810 BLACK BOX, ME810 Datasheet - Page 4

• Manufacturer Part Number: ME810
• Description: Computers, Modems Peripherals
• Manufacturer: BLACK BOX

06/07/2010
#11220
724-746-5500
blackbox.com
SHM-B Async includes EIA-232 control-line interfaces, status monitor
LEDs, and a loopback switch. The High-Speed SHM-B Async is
available in both standalone versions (ME802A or ME802A-R3)
and a rackmount card version (ME802C).
cable offering the best performance. And although you can use most
types of twisted-pair cable, to achieve maximum performance, we
recommend that you use CAT5 or higher
UTP cable.
Because there are no voltages greater than ±9 VDC or 17 VAC present
on the circuit board of the High-Speed SHM-B Async, it offers
maximum operator safety. Receive lines are protected from potential
ground differences through optical isolators rated at 2500 volts.
selectable for either DTE or DCE equipment, you don’t need
any special cross-pinned cables; it works with the modular
RJ cable that’s already installed in your building.
RS-232/RS-485
• Powered, point-to-point or multipoint, 2- or 4-wire.
• Provides high-speed service (64 kbps) for large multipoint
• Works with any DTE that can be polled, regardless of the DTE’s
• User-selectable port-timeout feature automatically disables
• Operates in 2-wire half-duplex or 4-wire full-duplex mode.
• Maximum distances of 4 miles (6.4 km) at 1200 bps over
installations (up to 64 drops).
RTS support.
a port once it finishes transmission.
24 AWG wire.
Along with transmitter and receiver circuits, the High-Speed
Use these SHMs with 4-wire metallic circuits, with twisted-pair
Plus, the SHM offers easy installation. Because it‘s switch-
Multipoint Line Driver
(LD485A-MP)
want to link many terminals—each with its own line driver—to
a computer via one master line driver. Use it, for instance, in high-
speed and polling applications. Depending on the operating
environment, as many as 64 devices can be linked together using
twisted-pair cable.
in point-to-point installations until you upgrade to a multi point
environment.
enabling an RS-232 device to transmit data over much longer
distances than is normally possible (up to 4 miles at 1200 bps).
Although it’s designed specifically to connect to other
RS-232/RS-485
port to any device with an RS-422 or RS-485 interface. For instance,
you can connect RS-485 and RS-422 devices to the same LD485A-MP
in an industrial application.
check the system wiring for both the RS-232 and RS-485 interfaces.
In addition, transient protection on the RS-485 interface helps prevent
damage from voltage transients on the data line.
DTE that can be polled, regardless of the DTE’s RTS support, so
you get total compatibility with your DTE hardware.
for a user-selectable port timeout. After the last character
is sent from one of the ports and a specified period of time passes,
the line driver disables any transmission from that port. This way,
a single port won’t monopolize your network.
standalone 115-VAC version (ME836A-R5) only.
Here‘s the ideal line driver for multipoint installations where you
You can also use the RS-232/RS-485
And it operates as an RS-232 to RS-485 interface converter,
The line driver also features a manual loopback test, so you can
Special circuitry within the driver enables it to work with any
The RS-232/RS-485
The RS-232/RS-485
Multipoint Line
Multipoint Line Driver
Multipoint Line Driver
BLACK BOX
Drivers, you can connect the RS-485
Multipoint Line Driver
can be jumpered
is available in a
®
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