Patton electronic 1070 - Manual (Page 14)

APPENDIX A
PATTON MODEL 1070 SPECIFICATIONS
Transmission Format: Synchronous
Distances: See table (below)
Interface: RS-232 (CCITT V.24) DB-25 female
Transmission Line: 4-wire, unconditioned via RJ-11 or terminal blocks
Data Rates: 1.2, 2.4, 4.8, 7.2, 9.6, 14.4 and 19.2 Kbps
Clocking: Internal or external
Controls: Carrier constantly "ON" or controlled by RTS; RTS/CTS
delay set to 0, 8 or 53 mS
Applications: Point-to-point or multi-point
Indicators: Tri-state indicators for Transmit Data, Receive Data,
Request to Send and Carrier Detect
Diagnostics: Loop 3 and 4, local and remote analog loopback
Optical Isolation: 2500 V RMS (minimum)
Power Supply: Wall-mount, 10 - 12V AC, 200mA
Dimensions: 4.127"W x 1.52"H x 5.0"L
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APPENDIX B
PATTON MODEL 1070 CABLE RECOMMENDATIONS
The Patton Model 1070 is designed and tested to communicate
over twisted-pair cable with the following characteristics:
Wire Gauge Capacitance Resistance
19 AWG/.9mm 83nF/mi or 15.72 pF/ft. .0163Ω/ft.
22 AWG/.6mm 83nF/mi or 15.72 pF/ft. .0326Ω/ft.
24 AWG/.4mm 83nF/mi or 15.72 pF/ft. .05165Ω/ft.
Using the above characteristics as a baseline, we estimate the
distance limitations for the Model 1070 to be as follows.
To reduce the potential of difficulties in the field, we recommend that
the cable used to connect the Model 1070s have a capacitance of no
greater than 20pF/ft., and that the wire be no thinner than 26 AWG.
The Model 1070 is designed to withstand normal environmental noise
and conditions. However, other environmental factors too numerous to
discuss may affect proper operation.
The distance table above should
be used as a general guideline only.
Data
Rate
19,200 2.5 (4.0) 2.1 (3.4) 1.3 (2.1)
9,600 3.7 (6.0) 2.3 (3.7) 1.7 (2.7)
4,800 4.9 (7.9) 4.9 (7.9) 2.5 (4.0)
2,400 8.2 (13.2) 5.8 (9.3) 4.6 (7.4)
1,200 10.2 (16.4) 8.3 (13.4) 6.8 (10.9)
Model 1070 Distance Table - Miles (Km)
Wire Gauge
19 (.9mm) 22 (.6mm) 24 (.4mm)