Black Box DATA SHARER RS-232 - Manual

1
Transparent to data
rates up to 64 kbps.
Synchronous and
asynchronous data
transmission.
Choose either
hardware or round-
robin priority to select
terminal ports.
Front-panel switches
enable and disable
RTS on each input port.
Jumper-selectable
options include RTS
delay, RXD operation,
RTS-timeout period,
and data-timeout
signal.
W ith the RS-232 Data Sharer,
you save the cost of extra
modems and leased phone lines
for your RS-232 systems. Connect
up to 2, 4, or 8 RS-232 devices to a
single modem and phone line.
Depending on the size of your
system, choose either a 2-Port,
4-Port, or 8-Port model. All three
models feature transparent
operation (up to 64 kbps) and LED
monitoring.
By cascading two data
sharers together, you can
connect up to 15 devices to your
RS-232 line.
The Data Sharers work with
synchronous or asynchronous
devices.
You control which ports can
access the modem at any given
time. Simply toggle the RTS
switches conveniently located on
the front panel of the Data Sharer
to enable or disable RTS for a
particular port. If RTS is disabled,
PWR
MASTER PORT
CTS CD RXD
RTS DISABLED
RTS ENABLED
RTS ST
ATUS
A
B
C
D
E
F
G
H
RS-232 DA
TA SHARER-8
MASTER PORT
CTS CD RXD
RTS DISABLED
RTS ENABLED
PWR
RTS ST
ATUS
A
B
RS-232 DA
TA SHARER-2
Cut equipment costs and phone charges by
using a single phone line and modem for up
to 2, 4, or 8 RS-232 devices.
Key Features
2-PORT, 4-PORT,AND 8-PORT RS-232 DATA SHARERS
the Data Sharer will ignore
attempts to access the modem by
the device attached to that port.
The 4- and 8-Port models can
be polled sequentially for RTS, or
you can set a jumper to give
certain ports priority over others.
The Data Sharers work with
popular IBM communications
protocols, including half-duplex
Bisynchronous communication
and Synchronous Data Link
Control (SDLC).
Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: [email protected]
© 2005. All rights reserved.
Black Box Corporation.
11/2/2005 #10920
Connect the IBM mainframe at your central office to several IBM
controllers at a branch office across the country.
Share one modem among several PCs in an office to connect to the
async mainframe in your company’s computer room.
Typical Applications