APPENDIX A
SPECIFICATIONS
Transmission Format: Asynchronous
Data Rate: 0 to 19.2 Kbps
Surge Protection: 600W power dissipation at 1 mS
Control Signal: DCE Mode: CTS (Pin 8) turns ON immediately after
the terminal raises RTS (Pin 9); DSR (Pin 2) turn ON immediately
after the rack has power; CD (Pin 3) may be constantly “ON” or
“normal” (i.e. follows presence or absence of RXC signal).
Transmit Line: 4 wire, unconditioned line (2 twisted pairs)
Transmit Mode: Full duplex, 4-wire
Line Connection: RJ-11 or RJ-45 jacks
Temperature Range: 1-50°C (34-122°F)
Altitude: 0-15,000 feet
Humidity: Up to 95% non-condensing
Dimensions: 0.95”w x 3.1”h x 5.4”l
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APPENDIX B
CABLE RECOMMENDATIONS
The Patton Model 222NRC operates at frequencies of 20kHz or less
and has been performance tested by Patton technicians using twisted-
pair cable with the following characteristics:
Wire Gauge
Capacitance
Resistance
19 AWG
83nf/mi or 15.72 pf/ft.
.0163 Ohms/ft.
22 AWG
83nf/mi or 15.72 pf/ft.
.0326 Ohms/ft.
24 AWG
83nf/mi or 15.72 pf/ft.
.05165 Ohms/ft.
To gain optimum performance from the 222NRC, please keep the
following guidelines in mind:
•
Always use twisted pair wire—this is not an option
• Use twisted pair wire with a capacitance of 20pf/ft or less
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid higher
AWG numbers than 26)
• Use of twisted pair with a resistance greater than the above
specifications may cause a reduction in maximum distance
obtainable; functionality should not be affected
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