APPENDIX A
PATTON MODEL 222N9 SPECIFICATIONS
Transmission Format
: Asynchronous
Data Rate
:
0 to 19,200 bps (no strapping)
Control Signal
:
CTS (Pin 8) turns ON immediately after the
terminal raises RTS (Pin 7). DSR (Pin 6)
and DCD (Pin 1) turn ON immediately after
the terminal raises DTR (Pin 4).
Transmit Line
:
4 wire, unconditioned line (2 twisted pairs)
Transmit Mode
:
Full Duplex, 4-wire
Transmit Level
: 0
dBm
Line Connection
:
RJ-11 or RJ-45 jack or 5 screw terminal
posts (4 wires and 1 ground) and a strain
relief insert. Works well with data signals
only.
Power Supply
:
None required, uses ultra low power from
EIA data and control signals
Surge Protection:
Compliant with IEC 801.5 level 2, 1kV
(Model 222N9S Only)
Size
:
2.50" x 1.2" x .75"
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3.2 CONNECTION TO THE EIA-574 (RS-232) INTERFACE
The Model 222N9 is configured as a DCE, and is wired according
to the EIA-574 standard.
EIA-574 Standard
DB-9
SIGNAL
3---------------------TD
2---------------------RD
7---------------------RTS
8---------------------CTS
1---------------------CD
4---------------------DTR
6---------------------DSR
5---------------------SG/FG
Due to its small size, the Model 222N9 is able to plug directly into
the serial port of your EIA-574 DTE device (PC, laptop, etc.). If you
must use a cable to connect the Model 222N9 to the DTE device, make
sure that it is a
straight through
cable of the shortest possible
length—we recommend 6 ft or less.
3.3 OPERATING THE MODEL 222N9
Once the Model 222N9 is properly installed, it should operate
transparently—as if it were a standard cable connection. Operating
power is derived from the EIA-574 data and control signals; there is no
"ON/OFF" switch. All data from the EIA-574 interface, including
X-ON/X-OFF flow control information, is passed straight through. Any
hardware flow control signals are looped back at the interface and are
not passed between the short hauls.
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