USER
MANUAL
MODEL 1008
Ultra-Miniature, High Speed,
Multipoint DB-9 Short Range
Modem
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
Part# 07M1008-D
Doc# 047041U,
Rev. E
Revised 1/22/08
CERTIFIED
An ISO-9001
Certified Company
1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 1008 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 1008 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 1008 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 1008
does cause interference to radio or television reception, which can be
determined by disconnecting the EIA/TIA-574 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 CE NOTICE
The CE symbol on your Patton Electronics equipment indicates
that it is in compliance with the Electromagnetic Compatibility (EMC)
directive and the Low Voltage Directive (LVD) of the Union European
(EU). A Certificate of Compliance is available by contacting Technical
Support.
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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
• Operates asynchronously, point to point or multipoint,
over 2 or 4 wires
• Up to 50 multipoint device drops in a polling environment
• Data rates to 115.2 Kbps
• Passes transmit & receive data, one control signal each direction
• No AC power or batteries are required
• Variable high/low impedance settings
• Able to operate with or without “echo”
• Carrier can be set as “constantly on” or “controlled by RTS”
• Ultra-miniature size (2.50" x 1.20" x 0.75")
• Twisted pair connection via strain relief, RJ-11 or RJ-45
• Silicon Avalanche Diode surge protection
2.2 DESCRIPTION
The Model 1008 High Speed, Multipoint, DB-9 Short Range
Modem provides exceptional versatility in an ultra-miniature package.
Requiring no AC power or batteries for operation, the Model 1008
supports asynchronous EIA/TIA-574 data rates to 115.2 Kbps over one
or two unconditioned twisted pair. Distances up to 15.0 miles are
attainable at lower data rates (1.2 Kbps, 19 AWG twisted pair).
The Model 1008 can handle up to 50 terminal drops in a multipoint
polling environment. For RS-485 and serial printer applications
requiring hardware handshaking, the Model 1008 passes one control
signal in each direction. The Model 1008 may be configured for high or
low impedance, carrier may be set to “constantly on” or “controlled by
RTS”, and the unit can operate with or without “echo”. RTS/CTS delay
may be set for “no delay” or 8 mS.
Options for twisted pair connection include terminal blocks with
strain relief, RJ-11, RJ-45 and dual modular connectors for daisy
chaining. Silicon Avalanche Diodes provide 600 watts per wire of
protection against harmful data line transient surges.
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To access the Model 1008’s internal PC boards, insert a small flat-
blade screwdriver between the connector and the lip of the case and
twist gently as shown in Figure 3 (below).
Both DIP switch S1 and S2 are marked with individual switch
numbers 1 thru 4. Use these numbers, as well as the “ON” designation
to orient the switch properly (see Figure 4, below). Use a small screw
driver or similar instrument to set each individual switch.
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“ON”
“OFF”
Figure 4. Close-up of DIP switches S1 and S2, showing ON/OFF orientation.
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Figure 3. Opening the Model 1008’s plastic case with a small screwdriver
ON
3.1.3 DIP SWITCH S2 SETTINGS
DIP switch S2 is used to configure carrier control, RTS/CTS delay
and communication protocol. The summary table below shows the
factory default settings for switch S2. Following the summary table is a
detailed description of each individual switch.
*Note: Switches S2-3 and S2-4 should be switched simultaneously
S2-1: Carrier Control Method
The setting for switch S2-1 determines whether the carrier is
“Constantly On” or “Controlled by RTS”. This setting allows for
operation in switched carrier, multipoint and/or hardware handshaking
applications.
S2-1
Setting
On Controlled by RTS
Off Constantly ON
S2-2: RTS/CTS Delay
The setting for switch S2-2 determines the amount of delay
between the time the Model 1008 “sees” RTS and when it sends CTS.
Note: RTS/CTS Delay setting should be based upon transmission
timing.
S2-2
Setting
On 8 mSec
Off no delay
S2-3 and S2-4: “Transmit Off” Impedance
Switches S2-3 and S2-4 are set together to determine whether the
receiving device “sees” the impedance of the Model 1008’s transmitter
as being “high” or “intermediate” when the transmitter is turned off. The
“intermediate” setting is useful in half-duplex environments where the
receiving device does not respond well to the “high” setting.
S2-3
S2-4 Setting
On On Intermediate Impedance
Off Off High Impedance
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SWITCH S2 SUMMARY TABLE (factory defaults in bold)
Position Function ON Position OFF Position
S2-1 Carrier Control RTS Constantly ON
S2-2 RTS/CTS Delay 8 mSec No Delay
S2-3*
“XMT Off” impedance
Intermediate High
S2-4*
“XMT Off” impedance
Intermediate High
4.0 INSTALLATION
Once the Model 1008 is properly configured, it is ready to connect
to your system. This section tells you how to properly connect the
Model 1008 to the twisted pair and EIA/TIA-574 interfaces, and how to
operate the Model 1008.
4.1 TWISTED PAIR CONNECTION
The Model 1008 supports 2-wire or 4-wire communication between
two or more EIA/TIA-574 devices at data rates to 115.2 Kbps. There
are two essential requirements for installing the Model 1008:
1. These units work in
pairs.
Therefore, you must have one Model
1008 at each end of a two twisted pair interface. In multipoint
environments, there must be one Model 1008 at the EIA/TIA-574
host and one at each EIA/TIA-574 terminal.
2. To function properly, the Model 1008 needs two twisted pairs of
metallic wire. These pairs must be
unconditioned
dry metallic
wire, between 19 and 26 AWG (the higher number gauges may
limit distance). Standard dial-up telephone circuits, or leased
circuits that run through signal equalization equipment, are
not
acceptable
.
For your convenience, the Model 1008 is available with several
different twisted pair interfaces: RJ-11 jack, RJ-45 jack, terminal blocks
with strain relief and dual modular jacks (for multipoint daisy-chaining).
4.1.1 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS
If your application requires you to connect one or two pairs of bare
wires to the Model 1008, you will need to open the case to access the
terminal blocks. The following instructions will tell you how to open the
case, connect the bare wires to the terminal blocks and fasten the
strain relief collar in place so the wires won't pull loose.
1. You should already have the case open for the configuration
procedure. If not, see Section 3.1.
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XMT+--------------------------------------------------RCV+
XMT----------------------------------------------------RCVG ---------------------- G
RCV+--------------------------------------------------XMT+
RCV----------------------------------------------------XMT-
To Shield (Optional)
}
One Pair
}
One Pair
7. When you finish connecting the wires to the terminal block, the
assembly should resemble the diagram below:
8. Place the 2 halves of the strain relief assembly on either side of
the telephone wire and press together very lightly. Slide the assembly
so that it is about 2 inches from the terminal posts and press together
firmly. If your cable diameter is too small or too large for our strain
relief, please contact our technical support. We have strain relief
assemblies to accommodate most cable diameters.
9. Insert the strain relief assembly with the wire going through it
into the slot in the bottom half of the modem case and seat it into the
recess in the case. (If the telephone wire is too thin to be held by the
strain relief assembly, you will need to order a different sized strain
relief. Call Patton's Sales Department at (301) 975-1000.)
+XMT- G -RCV+
+XMT- G -RCV+
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(Continued)
When connecting two Model 1008s, it is necessary to use a
crossover cable. The diagrams below show how a crossover cable
should be constructed for the following environments: 4-wire RJ-11,
4-wire RJ-45, 2-wire RJ-11 or 2-wire RJ-45.
RJ-1
1 Cable (4-Wire)
SIGNAL PIN# PIN# SIGNAL
GND
†
1-----------------------6 GND
†
RCV- 2-----------------------4 XMTXMT+ 3-----------------------5 RCV+
XMT- 4-----------------------2 RCVRCV+ 5-----------------------3 XMT+
GND
†
6-----------------------1 GND
†
†
Connection to ground is optional
RJ-45 Cable (4-Wire)
SIGNAL PIN# PIN# SIGNAL
GND
†
2-----------------------7 GND
†
RCV- 3-----------------------5 XMTXMT+ 4-----------------------6 RCV+
XMT- 5-----------------------3 RCVRCV+ 6-----------------------4 XMT+
GND
†
7-----------------------2 GND
†
RJ-11 Cable (2-Wire)
SIGNAL PIN# PIN# SIGNAL
XMT+ 3-----------------------3 XMT+
XMT- 4-----------------------4 XMT-
RJ-45 Cable (2-W
ire)
SIGNAL PIN# PIN# SIGNAL
XMT+ 4-----------------------4 XMT+
XMT- 5-----------------------5 XMT-
†
Connection to ground is optional
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4.2 WIRING FOR MULTIPOINT CIRCUITS
The Model 1008 supports multi-point applications using either a
star or daisy chain topology. Both topologies require special wiring, as
well as specific DIP switch settings for master and slave units. Refer to
Section 5.0 for multipoint DIP switch settings.
4.2.1 STAR TOPOLOGY
Using a star topology, you may connect several Model 1008s
together in a master/slave arrangement. Maximum distance between
the units will vary based upon the number of drops, data rate, wire
gauge, etc. Call Technical Support for specific distance estimates.
Figure 5 (below) shows how to wire the two-pair cables properly for
a Model 1008 star topology. Note that the ground connection is not
needed.
4.2.2 DAISY CHAIN TOPOLOGY
Using a daisy chain topology, you may connect several Model
1008s together in a master/slave arrangement. Maximum distance
between the units will vary based upon the number of drops, data rate,
wire gauge, etc. Call Technical Support for specific distance estimates.
(Continued)
Figure 6 (below) shows how to wire the two-pair cables properly for
a Model 1008 daisy chain topology. Note that the ground connection is
not needed.
4.3 CONNECTION TO THE EIA/TIA-574 INTERFACE
The Model 1008 is designed to plug directly into the DB-9 serial
port of an EIA/TIA-574 DTE device (PC, laptop, host). If you must use
a cable to connect the Model 1008 to the DTE device, make sure that it
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HOST FIRST SLAVE OTHER SLAVE(S)
XMT+---------------------RCV+ -----------------------RCV+
XMT- ---------------------RCV- -----------------------RCVRCV+---------------------XMT+ -----------------------XMT+
RCV- ---------------------XMT- -----------------------XMT-
Figure 6. Daisy chain wiring for Model 1008 host and slaves
terminal raises DTR; DCD turns “ON” after
recognizing the receive signal from the line;
CTS turns “ON” after the terminal raises
RTS.
RTS/CTS Delay: 8 mSec or “no delay”
Carrier: The carrier is switch selected either
continuous operation or switched operation,
controlled by RTS
Surge Protection: 600W power dissipation at 1 mS
Power: Draws operating power from EIA/TIA-574
data and control signals; no AC power or
batteries required. If necessary, 6-12 VDC
can be applied to pin 9 of the EIA/TIA-574
interface.
Temperature: 0 to 50º C
Humidity: 5 to 95%, non-condensing
Size: ”2.50" x 1.2" x .75"
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