USER
MANUAL
MODEL 1110
Asynchronous, Carrier
Controlled Fiber Optic
Modem
07M1110-C
Doc # 018011UC
Revised 9/26/96
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
1.0 WARRANTY INFORMATION
2.0 GENERAL INFORMATION
Patton Electronics warrants all Model 1110 components to be free
from defects, and will—at our option—repair or replace the product
should it fail within one year from the first date of shipment.
This warranty is limited to defects in workmanship or materials, and
does not cover customer damage, abuse or unauthorized modification.
If this product fails or does not perform as warranted, your sole
recourse shall be repair or replacement as described above. Under no
condition shall Patton Electronics be liable for any damages incurred
by the use of this product. These damages include, but are not limited
to, the following: lost profits, lost savings and incidental or
consequential damages arising from the use of or inability to use this
product. Patton Electronics specifically disclaims all other warranties,
expressed or implied, and the installation or use of this product shall be
deemed an acceptance of these terms by the user.
1.1 RADIO AND TV INTERFERENCE
The Model 1110 generates and uses radio frequency energy, and if
not installed and used properly—that is, in strict accordance with the
manufacturer’s instructions—may cause interference to radio and
television reception. The Model 1110 has been tested and found to
comply with the limits for a Class A computing device in accordance
with the specifications in Subpart J of Part 15 of FCC rules, which are
designed to provide reasonable protection from such interference in a
commercial installation. However, there is no guarantee that
interference will not occur in a particular installation. If the Model 1110
does cause interference to radio or television reception, which can be
determined by disconnecting the RS-232 interface, the user is
encouraged to try to correct the interference by one or more of the
following measures: moving the computing equipment away from the
receiver, re-orienting the receiving antenna and/or plugging the
receiving equipment into a different AC outlet (such that the computing
equipment and receiver are on different branches).
1.2 SERVICE
All warranty and non-warranty repairs must be returned freight
prepaid and insured to Patton Electronics. All returns must have a
Return Materials Authorization number on the outside of the shipping
container. This number may be obtained from Patton Electronics
Technical Service at (301) 975-1007.
Packages received without an
RMA number will not be accepted.
Patton Electronics’ technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 1110. Technical Service hours: 8AM to 5PM EST, Monday
through Friday.
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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 1 mile
• 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 1110 miniature RS-232 fiber optic modem brings
fiber to the desktop. Communicating over dual optical fibers, the Model
1110 supports data rates to 19.2 Kbps and distances to 1 mile. The
Model 1110 operates full or half duplex and plugs directly into a
workstation’s RS-232 port.
Like all fiber optic modems, the Model 1110 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
1110 requires no AC power or batteries to operate.
Measuring only 2.66” x 2.10” x .73”, the Model 1110 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 1110 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.
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3.0 CONFIGURATION
The Model 1110 is simple to install and is ruggedly designed for
excellent reliability: just set it and forget it. This section will describe
how to configure the Model 1110’s DCE/DTE switch and how to set the
internal DIP switches.
3.1 SETTING THE EXTERNAL DCE/DTE SWITCH
For your convenience, the Model 1110 has an externally
accessible DCE/DTE switch (see Figure 1, below). If the device
connected to the Model 1110 is a PC, terminal or host computer (or is
wired like one), set the switch to “DCE”. This causes the Model 1110 to
behave like Data Communications Equipment and transmit data on pin
3. If the device connected to the Model 1110 is a modem or multiplexer
(or is wired like one), set the switch to “DTE”. This setting causes the
Model 1110 to behave like Data Terminal Equipment and transmit data
on pin 2.
Figure 2. Using a small screwdriver to open the Model 1110 case
DCE
DCE DTE
Figure 1 Externally accessible DCE/DTE switch
DTE
3.2 SETTING INTERNAL DIP SWITCHES
The Model 1110‘s eight external DIP switches allow configuration
of flow control and LED options. To set the internal switches, follow
these steps:
1) Open the Model 1110 case by inserting a small flat-blade
screwdriver between the case lip and DB-25 connector and
twisting gently (see figure 2, opposite page).
2) Having exposed the Model 1110 PC board, you will see the
miniature DIP switch packet on the underside of the board
(the
side opposite the DCE/DTE switch).
3) To set the switches, use a small screwdriver and gently push
each switch to its proper setting. The ON position is printed on the
switch packet.
4) Fit the case halves together and push to snap closed.
3.2.1 DETAILED SWITCH SETTINGS
The DIP switches on the Model 1110 PC board are labeled 1-8.
Only switches 1-4 are used. Switches 5-8 are reserved for future use.
Below are descriptions of the Model 1110 DIP switch settings.
Switch 1: Carrier Control
The setting for Switch 1 determines whether carrier is constantly
on or controlled by RTS
Carrier SW1
Constant OFF*
Controlled by RTS ON
*Factory Default
(continued)
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Switches 2 & 3: RTS/CTS Delay
The settings for Switches 2 & 3 determine whether the RTS/CTS
delay will be 0 mS, 79.5 mS or 9.5 mS.
RTS/CTS Delay SW2 SW3
0 mS OFF OFF
79.5 mS ON OFF
9.5 mS ON* ON*
4.0 INSTALLATION
The Model 1110 is easy to install. After configuring the DIP
switches, simply connect the two fiber cables and then connect the
RS-232 interface. Figure 3 (below) shows the location of the fiber
connections on the Model 1110’s rear panel.
*Factory Default
Switch 4: Enable Carrier Detect LED
The setting for Switch 4 determines whether the Model 1110
“carrier detect” LED indicator is enabled . When enabled, the carrier
detect LED will glow red if a proper carrier frequency is recognized.
Carrier Detect LED SW4
Enabled ON*
Disabled OFF
*Factory Default
Switches 5 through 8 : Future Use
LEDs
FiberFiber
Figure 3. Rear panel of the Model 1110, showing fiber connections
4.1 FIBER CONNECTIONS
The Model 1110 short range modems are designed to work in
pairs
. You will need one at each end of a dual fiber cable. This cable
connects to each Model 1110 using either an ST or an SMA connector.
Figure 4 (below) shows a close up of each of these connector types.
SMA
ST
Alignment pin
Figure 4. Close up of ST and SMA connections
faces down
4.2 RS-232 CONNECTION
Because the Model 1110 is designed to behave as either a DCE or
a DTE device, it does not need special cables to operate. Always use a
straight-through
RS-232 cable.
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5.0 OPERATION
Once you have configured each Model 1110 properly and
connected the fiber and RS-232 cables, you are ready to operate the
units. This section describes the LED status monitors and the power
up process.
5.1 LED STATUS MONITORS
The Model 1110 features two status LEDs that indicate the
condition of carrier detect and fiber optic output. Figure 5 (below)
shows the back panel location of each LED. Following Figure 5 is a
description of each LED’s function.
APPENDIX A
SPECIFICATIONS
Transmission Line: Dual optical cable
Transmission Mode: Asynchronous, half or full duplex, point-to-point
Interfaces: EIA RS-232, CCITT V.24
Data Rates: 0 - 19.2 Kbps
Distance: 1 mile over continuous fiber
RTS/CTS Delay: Switch-selectable: No delay, 9.5 mS, 79.5 mS
Carrier Detect Fiber Optic Output
LEDs
Transmit FiberReceive Fiber
Figure 5. Back panel view of the Model 1110
• The “Carrier Detect” LED will glow red when a proper carrier
frequency is recognized.
• The “Fiber Optic Output” LED will glow red to indicate
presence of infrared output and transmit carrier
5.2 POWER UP
Once the Model 1110 is properly installed, it should operate
transparently—as if it were a standard cable connection. Since
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.
Receiver Sensitivity: <-39 dBm
Coupled Power Output: -29 to -33 dBm
Optic Wavelength: 850 nm
LED Indicators: Carrier Detect and Fiber Optic Output
Connectors: DB-25 male or female on RS-232 side; ST or SMA
connectors on fiber side
Power Supply: No external power required; uses power from RS-232
data and control signals
Temperature Range: 0-50°C (32-122°F)
Altitude: 0-15,000 feet
Humidity: Up to 95% non-condensing
Weight: 2 oz.
Dimensions: 2.66” x 2.10” x 0.73”
When the local and remote Model 1110’s are both powered up and
passing data normally, the following LED conditions will exist:
• Carrier detect = solid red
• Fiber optic output = solid red
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APPENDIX B
PIN CONFIGURATIONS
DIRECTION “DCE” STANDARD SETTING DIRECTION
1- (FG) Frame Ground
2- (TD) Transmit Data To Model 1110
3- (RD) Receive Data From Model 1110
4- (RTS) Request to Send To Model 1110
5- (CTS) Clear to Send From Model 1110
6- (DSR) Data Set Ready From Model 1110
To Model 1110 Data Term. Ready (DTR) - 20
DIRECTION “DTE” STANDARD SETTING DIRECTION
From Model 1110 Data Term. Ready (DTR) - 20
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect From Model 1110
1- (FG) Frame Ground
2- (TD) Transmit Data From Model 1110
3- (RD) Receive Data To Model 1110
4- (RTS) Request to Send From Model 1110
5- (CTS) Clear to Send To Model 1110
6- (DSR) Data Set Ready To Model 1110
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect To Model 1110
APPENDIX C
BLOCK DIAGRAM
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