2
• A snap-in 4-Port Expansion
Board for controlling four
additional slave devices. You
can install this circuit board
in only minutes with just a
screwdriver.
• An asynchronous RS-232
modem or line driver for
long-distance control of your
devices.
• RS-232 cable.
• AC and data-line surge
protectors.
• A country-specific power
cord or adapter for operating
the COS II outside of North
America.
• Communications software.
Compliance:
FCC Part 15 Class A,
DOC Class/MDC classe A
Interface:
EIA RS-232/ITU-TSS V.24;
each port can be set
independently as DTE or DCE
Protocol:
Asynchronous
Code Set:
ASCII
Data Format:
7 or 8 data bits with
even, odd, or no parity (user-
selectable); 1 stop bit (fixed)
Flow Control:
Hardware (DTR/CTS)
or software (X-ON/X-OFF), user-
selectable
Operation:
Full duplex
Data Rate:
19,200, 9600, 4800,
2400, 1200, 600, 300, or 110 bps,
user-selectable
Maximum Distance:
50 ft. (15.2 m) to any attached
device using standard cables, or
500 ft. (152.4 m) using Extended
Distance Data Cables
Internal Memory:
8 KB of buffer
RAM
User Controls:
ASCII characters
from master device; (7) Internal
8-pos. DIP switches: (2) for
system options, (5 or 9*) for port
options; (5 or 9*) Internal jumpers
for DTE/DCE; (1) Front-mounted
reset button
Diagnostics:
Various self-tests
Indicators:
(10) Front-mounted LEDs:
(1) Power, (1) Lockout, and
(8) Link Status
Connectors:
(5 or 9*) Rear-mounted
DB25 female
Leads Supported:
Pins 1 through 8,
20, and 22
Power:
Through nondetachable
desktop power supply: SW590A-
R2: 115 VAC, 60 Hz; SW590AE-R2:
230 VAC, 50 Hz
MTBF:
20,000 hours (16,000 hours
with Expansion Board)
Temperature Tolerance:
Operating: 32 to 113°F (0 to 45°C);
Storage: –4 to 158°F (–20 to 70°C)
Humidity Tolerance:
0 to 95%
noncondensing
Enclosure:
Steel
Size:
2.3"H x 12.2"W x 11"D
(5.8 x 31 x 27.9 cm)
Weight:
Base unit with power supply:
9.6 lb. (4.4 kg);
Expansion board: 0.6 lb. (0.3 kg)
*
1 for each basic or expanded
port
Additional equipment you might need:
• The control sequence of the Code Operated Switch II is a pair of
ASCII characters: one “arming character” that gets the box’s
attention and prepares it to switch, and one “port-selection
character” that identifies the port to switch to. You can select any
of the 256 characters in the extended ASCII character set to be the
arming character.
• Graphics data can include almost any combination of characters,
including those of the COS II’s control sequences. For this reason,
the COS II has a “graphics pause” feature that allows it to handle
graphics files without unintentional switching: A pause (an absence
of data) whose length you can set must occur before the COS II will
recognize a pair of characters as a control sequence; otherwise,
the COS II will pass the characters as data.
• You can also choose whether the COS II passes the hardware flow-
control leads DTR and CTS through to the attached devices, or uses
them strictly to control its buffer.
Technically Speaking
Specifications
Ordering Information
ITEM
CODE
Code Operated Switch II
115 VAC ..............................................................SW590A-R2
230 VAC............................................................SW590AE-R2
You may also need…
4-Port Expansion Board ...........................................SW591C
Extended Distance Data
Cable (12 conductors) ...........................................EDN12C
Solve complex serial
conversion problems
simply—with the COS II.
PC
Modem
(19,200 bps)
Laser Printers
(9600 bps)
Plotter
(1200 bps)
Up to 500 ft. (152.4 m)
of Extended Distance
Data Cable (EDN12C)
CODE OPERATED
SWITCH II
