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APPENDIX B
PATTON MODEL 222N9 CABLE RECOMMENDATIONS
The Patton Model 222N operates at frequencies of 20kHz or less
and has been performance tested by Patton technicians using twisted-
pair cable with the following characteristics:
W
ire Gauge Capacitance Resistance
19 AWG/.9mm 83nf/mi or 15.72 pf/ft. .0163 Ohms/ft.
22 AWG/.6mm 83nf/mi or 15.72 pf/ft. .0326 Ohms/ft.
24 AWG/.5mm 83nf/mi or 15.72 pf/ft. .05165 Ohms/ft.
To gain optimum performance from the Model 222N, 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.
• Environmental factors too numerous to mention can affect the
maximum distances obtainable at a particular site. Use “maximum
distance” figures as a general guideline only
.
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APPENDIX C
PATTON MODEL 222N9 PIN ASSIGNMENTS
EIA-574 (RS-232) Interface
(DB-9 Connector)
EIA-422 Interface
(RJ-11 Female Connector)
EIA-422 Interface
(RJ-45 Female Connector)
NOTE: Signals XMT+ and XMT- are the EIA=422 “A” and “B” transmitters, respectively;
Signals RCV+ and RCV- are the EIA-422 “A” and “B” receivers, respectively.
RJ-11 (6 Pin) SIGNAL/PIN #
1 - (G) Ground
2 -(RCV-) Receive Data +
3 -(XMT+) Transmit Data -
4 -(XMT-) Transmit Data -
5 -(RCV+) Receive Data +
6 - (G) Ground
RJ-45 (8 Pin) SIGNAL/PIN #
1 - no connection
2 - (G) Ground
3 - (RCV-) Receive Data -
4 - (XMT+) Transmit Data +
5 - (XMT-) Transmit Data -
6 - (RCV+) Receive Data +
7 - (G) Ground
8 - no connection
1 Receive Line Signal Detector
2 Received Data
3 Transmitted Data
4 Data Terminal Ready
5 Ground/common Return
DCE
DTE
DCE
DCE
DCE
DCE
DTE
DTE
Common
Data Set Ready 6
Request To Send 7
Clear To Send 8
Ring Indicator 9
Signal/Voltage
Source
Signal Designations Signal Designations
Signal/Voltage
Source
EIA-574 Interface
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