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 or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Technical Support at (301) 975-1007.
2.1 FEATURES
• Communicates over dual optical fibers
• Data rates to 19.2 Kbps
• Distances to 4 miles (6.44 km)
• Plugs directly into an RS-232 port
• Immune to RFI/EMI noise, ground loops and transient surges
• Easily accessible DCE/DTE switch
• DIP Switch-selectable carrier control
• Requires no AC power or batteries
• Two easy-to-read status indicators
• Fits into tight installation spaces
• Male or female DB-25 and SMA or ST connectors available
2.2 DESCRIPTION
The Patton Model 1110A miniature RS-232 fiber optic modem
brings fiber to the desktop. Communicating over dual optical fibers, the
Model 1110A supports data rates to 19.2 Kbps and distances to 4 miles
(6.44 km). The Model 1110A operates full or half duplex and plugs
directly into a workstation’s RS-232 port.
Like all fiber optic modems, the Model 1110A is inherently immune
to RFI/EMI noise, ground loops and transient surges. The carrier may
be switch selected as either “Continuously On” or “Controlled by RTS”,
while an easily accessible DCE/DTE switch eliminates the need for
cumbersome RS-232 crossover cables. Two easy-to-read LED
indicators monitor the status of carrier detect and fiber optic output.
Drawing all necessary power from the RS-232 interface, the Model
1110A requires no AC power or batteries to operate.
Measuring only 2.66” x 2.10” x .73”, the Model 1110A is able to fit
into tight installation spaces. A convenient pop-open/snap-shut ABS
plastic case allows easy access to configuration switches. On the
RS-232 side, the Model 1110A comes equipped with either a male or
female DB-25 connector; on the fiber side, it is available with a choice
of SMA or ST connectors.
3.0 CONFIGURATION
The Model 1110A is simple to install and is ruggedly designed for
excellent reliability. This section describes how to configure the Model
1110A’s DCE/DTE switch and how to set the internal DIP switches.
3.1 CONFIGURATION SWITCHES
The Model 1110A uses a DTE/DCE switch and a 4 position internal
DIP switch that allow configuration to wide range of applications.
Figure 1, below, shows the position of the DIP switch and the DCE/DTE
switch on the top of the Model 1110A PC board.
3.1 SETTING THE EXTERNAL DCE/DTE SWITCH
For your convenience, the Model 1110A has an externally
accessible DCE/DTE switch (see Figure 2, below). If the device
connected to the Model 1110A is a PC, terminal (or is wired like one),
set the switch to “DCE” (Default Setting). This causes the Model 1110A
to behave like Data Communications Equipment and transmit data on
pin 3. If the device connected to the Model 1110A is a modem or
multiplexer (or is wired like one), set the switch to “DTE”. This causes
the Model 1110A to behave like Data Terminal Equipment and transmit
data on pin 2.
Figure 1. Model 1110A PC board, showing switch and strap locations
Figure 2 Externally accessible DCE/DTE switch
Default Setting = “DCE”
DCE
DTE
DCE
DTE
3
4
ON
1
2
3
4
DCE/DTE
Switch
DIP Switches
DTE
DCE
