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APPENDIX A
SPECIFICATIONS
Transmission Format: Synchronous, full duplex
Transmission Line: Two unconditioned twisted pair 19 - 26 AWG
Range: (See table below)
Interfaces: EIA RS-232, CCITT V.24
Data Rates: 1200 - 19.2 Kbps
Isolation: Minimum 1500 V RMS via custom transformers
Surge Protection: 600W Surge Protection (10x1000µs waveform)
(Model 1020S)
Control Signals: CTS turns on 7 or 53 mS (switch selectable)
after the terminal raises RTS; DSR and DCD are constantly on
Connectors: DB-25 male or female on RS-232 side;
RJ-11, RJ-45 or terminal block with strain relief on line side
Power Supply: None required; uses power from EIA data and
control signals
Temperature Range: 0-60°C (32-140°F)
Altitude: 0-15,000 feet
Humidity: Up to 95% non-condensing
Weight: 2 oz.
Dimensions: 2.66” x 2.10” x 0.73”
10. BEND the top half of the case as necessary to place it over the
strain relief assembly. Do not snap the case together yet.
11. Insert one captive screw through a saddle washer and then
insert the entire piece through the hole in the DB-25 end of the
case. Snap that side of the case closed. Repeat the process
for the other side. This completes cable installation.
4.2 CONNECTION TO THE RS-232 INTERFACE
Once you have connected the twisted pair wires correctly, simply
plug the Model 1020 directly into the DB-25 port of the RS-232 device.
After doing so, remember to insert and tighten the two captive
connector screws.
(Note: If you must use a cable to connect the Model 1020 to the
RS-232 device, make sure it is a
straight through
cable of the shortest
possible length—we recommend 6 feet or less).
4.3 OPERATING THE MODEL 1020
Once the Model 1020 is properly configured and installed, it should
operate transparently—as if it were a standard cable connection.
Operating power is derived from the RS-232 data and control signals;
there is no “ON/OFF” switch. All data signals from the RS-232 interface
are passed straight through. All control signals from the RS-232
interface are looped back.
NOTE: If your system requires
hardware
flow control, you will
need the Patton Model 1030 or Model 1070 Short Range Modem.
Call Patton Customer Service at 301-975-1007 for more
information.
11 12
Data
Rate
Wire Gauge
19 24 26
19,200 7.5 3.5 2.5
9,600 10.0 3.5 2.5
4,800 10.0 7.0 4.0
2,400 10.0 8.5 5.0
1,200 11.0 8.5 6.0
Model 1020 Distance Table (miles)