2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor. If any questions arise during
installation or use of the unit, contact Patton Electronics Technical
Support (301) 975-1000.
2.1 FEATURES
• Transformer coupled for DC isolation between modems
• Immune to ground loops caused by ground potential differences
• Distances to 9.5 miles over 2 twisted pair (19 AWG @ 1200 bps)
• Supports data rates from 300 bps to 115.2 kbps
• Loops back all handshaking signals on the RS-232 interface
• Externally accessible DCE/DTE switch makes configuration easy
• Very thin case (.75") for closely spaced computer ports
• No AC power or batteries required—draws all necessary operating
power from the RS-232 interface
• Provides surge protection of 600 Watts per wire
2.2 DESCRIPTION
The Patton Model 1010B miniature, high speed, transformer
isolated short range modem lets two asynchronous RS-232 devices
communicate between buildings, over two twisted pair. Supporting
asynchronous data rates to 115.2 kbps, the Model 1010B derives the
necessary power for operation from the data and control voltages on
the RS-232 interface. DC transformer isolation on the line side gives
the Model 1010B immunity to ground loops that would otherwise
hamper between-building communications.
An external DCE/DTE switch lets you connect to the serial port of
either a computer/terminal (DTE) or a modem (DCE) without using a
crossover cable. The Model 1010B is available with three 4 wire
interface options: RJ-11, RJ-45 or terminal blocks with strain relief.
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3.0 CONFIGURATION
The Model 1010B also incorporates high speed avalanche diodes
that intercept data line transient surges and shunt them safely to
chassis ground. With surge handling capacity of 600W per wire at
1mS, the 1010B can protect itself and connected equipment from
nearby lightning strikes and other surges of electromagnetic radiation.
The Model 1010B is configured using an external DCE/DTE switch
and two internal jumpers (the factory jumper settings are appropriate for
most applications). This section describes the configuration switch and
jumpers and shows factory defaults. Figure 1 below shows the location
of the switch/jumpers on the Model 1010B’s internal PC board.
3.1 SETTING THE DTE/DCE SWITCH
For your convenience, the Model 1010B has an externally
accessible DCE/DTE switch (see Figure 2, below). If the device
connected to the Model 1010B is a modem or multiplexer (or is wired
like one), set the switch to "DTE." This setting causes the Model 1010B
to behave like Data Terminal Equipment and transmit data on pin 2.
If the device connected to the Model 1010B is a PC, terminal or
host computer (or is wired like one), set the switch to "DCE." This
setting causes the Model 1010B to behave like Data Communications
Equipment and transmit data on pin 3.
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DCE/DTE
Switch
Jumper JP3
Terminal
Block
Jumper JP2
Figure 1. PC Board Showing Location of Jumpers and DTESwitch.
Figure 2. Model 1010B Close-up View of External DCE/DTE Switch
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