CTI Products NCB-AY with Serial Interface User Manual
Model NCB-AY
Network Combiner Module
for Asynchronous Serial Channels
Wide Area Router for LONWORKS® Networks
User Guide # S2-60725-310
68-11310-310
CTI Products, Inc. NCB-AY User Guide
Standard Limited Hardware Warranty
LIMITED WARRANTY. Equipment manufactured by CTI Products, Inc. is warranted to be free from defects in material and workmanship for
a period of ONE (1) YEAR from date of shipment to original purchaser. Under this warranty, our obligation is limited to repairing or replacing
any equipment proved to be defective by our inspection within one year of sale to the original purchaser. This warranty shall not apply to
equipment which has been repaired outside our plant in any way, so as to, in the judgment of CTI Products, Inc. affect its stability or reliability,
nor which has been operated in a manner exceeding its specifications, nor which has been altered, defaced, or damaged by lightning.
CUSTOMER REMEDIES. In the event of a defect, malfunction, or failure to conform to specifications established by the seller during the
period shown, the customer shall call CTI Products, Inc. to obtain a Return Authorization Number and return the product or module, shipping and
insurance prepaid. CTI Products, Inc., will then at its option, either repair or replace the product or module and return it, shipping prepaid, or
refund the purchase price thereof. On-site labor at the purchaser's location is not included in this warranty.
EQUIPMENT NOT MANUFACTURED BY CTI Products, Inc. Equipment not manufactured by CTI Products, Inc. is excluded from this
warranty, but is subject to the warranty provided by its manufacturer, a copy of which will be supplied to you upon specific written request.
NO OTHER WARRANTIES. The foregoing constitutes the sole and exclusive remedy of the buyer and exclusive liability of CTI Products,
Inc., AND IS IN LIEU OF ANY AND ALL OTHER WARRANTIES EXPRESSED OR IMPLIED OR STATUTORY AS TO
MERCHANTABILITY, FITNESS FOR PURPOSE SOLD, DESCRIPTION, QUALITY, PRODUCTIVENESS OR ANY OTHER MATTER.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES. WITHOUT LIMITING THE FOREGOING, IN NO EVENT SHALL CTI
PRODUCTS, INC. OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION,
SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION,
LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE CTI
PRODUCTS, INC. EQUIPMENT BY PURCHASER OR OTHER THIRD PARTY, WHETHER UNDER THEORY OF CONTRACT, TORT
(INCLUDING NEGLIGENCE), INDEMNITY, PRODUCT LIABILITY OR OTHERWISE, EVEN IF CTI PRODUCTS, INC. HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR LOSSES. IN NO EVENT SHALL CTI PRODUCTS, INC.’S, LIABILITY
EXCEED THE TOTAL AMOUNT PAID BY PURCHASER FOR THE EQUIPMENT GIVING RISE TO SUCH LIABILITY.
Location: CTI Products, Inc
1211 West Sharon Road
Cincinnati, OH 45240 USA
Phone: +1.513.595.5900
Fax: +1.513.595.5983
Web: www.ctiproducts.com
E-mail, Sales: info@ctiproducts.com
Technical Support: lwsupport@ctiproducts.com
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CTI Products, Inc. NCB-AY User Guide
This manual covers NCB units of Revision 300 or higher and NCB/Plug software revision
1.00 or higher. The NCB Unit Revision can be found on the rear of the unit following the
letter “U”. The NCB/Plug software revision can be found on the Help/About screen of the
program. If the revision of the product in hand is greater than that shown above, there may
be additional features supported by the product that are not covered in this manual.
Information contained in this document is subject to change without notice and does not represent a commitment on the part of CTI
Products, Inc.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying
and recording, for any purpose without the written permission of CTI Products, Inc.
This manual describes products that include copyrighted CTI Products, Inc. computer programs in semiconductor memory. CTI Products,
Inc. reserves all rights for these programs, including the exclusive right to copy or reproduce the copyrighted computer programs in any
form. No copyrighted computer program contained in products described in this manual may be copied, reproduced, decompiled,
disassembled, or reversed engineered in any manner without express written permission of CTI Products, Inc. The purchase of products
from CTI Products, Inc. shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the
copyrights, patents, or patent applications of CTI Products, Inc., except for the normal non-exclusive, royalty fee license to use that arises
by operation of law in the sale of the product.
Copyright (c) 1995-2001 CTI Products, Inc. All rights reserved
NCB, NCB/AY, and WON are trademarks of CTI Products, Inc.
Echelon, LON, LONWORKS, LONTALK, and Neuron are U.S. registered trademarks of Echelon Corporation.
ii
CTI Products, Inc. NCB-AY User Guide
Radio Frequency Emissions and Immunity
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference
in which case the user will be required to correct the interference at his own expense. Changes or modifications to this unit not expressly
approved by the party responsible for compliance could void the user’s authority to operate the equipment. Limits specified in the standards listed
below are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
UNITED STATES: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules.
CANADA: This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
EUROPE: This equipment has been tested and found to comform with the following standards: EN60950, EN50082-1, IEC801-2, IEC801-3,
IEC801-4, and EN55022. This equipment complies with the requirements of the following directives: Low Voltage Directive 73/23/EEC, EMC
Directive 89/336/EEC, and 93/68/EEC Harmonization of CE Marking
iii
CTI Products, Inc. NCB-AY User Guide
TABLE OF CONTENTS
QUICK-START GUIDE ............................................................................................................................................. 1
1. INTRODUCTION ................................................................................................................................................... 3
WHAT IS AN NCB/AY UNIT? ..................................................................................................................................... 3
REFERENCE DOCUMENTS ........................................................................................................................................... 5
FRONT PANEL ............................................................................................................................................................. 6
REAR PANEL............................................................................................................................................................... 7
2. SETUP AND OPERATION .................................................................................................................................... 9
STEP 1. MOUNTING .................................................................................................................................................... 9
STEP 2. SWITCH SETUP .............................................................................................................................................. 9
STEP 3. ELECTRICAL CONNECTIONS ........................................................................................................................ 11
STEP 4. IMPLEMENTATION IN A NETWORK ............................................................................................................... 12
STEP 5. CONTROLLING THE WAN CONNECTION...................................................................................................... 15
3. NETWORK VARIABLE (NV) CONTROL ....................................................................................................... 17
TYPICAL NV BINDINGS ............................................................................................................................................ 17
MODEM CONTROLLER OBJECT ................................................................................................................................. 18
TELEPHONE DIRECTORY OBJECT .............................................................................................................................. 25
GLOBAL CONTROL OBJECT ...................................................................................................................................... 26
4. NCB/PLUG CONFIGURATION PLUG-IN ....................................................................................................... 28
INSTALLATION .......................................................................................................................................................... 28
ACCESSING NCB/PLUG .......................................................................................................................................... 29
USAGE ...................................................................................................................................................................... 29
APPENDIX ................................................................................................................................................................ 32
APPENDIX A. FACTORY DEFAULT CONFIGURATION ................................................................................................. 32
APPENDIX B. MOUNTING OPTIONS ........................................................................................................................... 34
APPENDIX C. CONNECTOR DETAILS ......................................................................................................................... 37
APPENDIX D. TROUBLESHOOTING ............................................................................................................................ 40
APPENDIX E. SPECIFICATIONS .................................................................................................................................. 43
APPENDIX F. RING MODE ................................ ................................ ................................................................ ......... 44
INDEX ........................................................................................................................................................................ 46
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CTI Products, Inc. NCB-AY User Guide
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CTI Products, Inc. NCB-AY User Guide
QUICK-START GUIDE
This Quick Start Guide provides a concise series of steps to get a pair of the NCB modules “up and running”
quickly so that initial operation may be confirmed.
It is highly recommended that, if possible, the pair of NCB/AY modules be tested in your application by first
connecting them “back-to-back” with a simple serial “null-modem” cable. Once operation is confirmed using
this connection scheme, continue by connecting the NCB/AY modules together using the actual intended
communication channel.
It is important that all LonWorks devices attached to the “NETWORK” connector of any one NCB module use
the same network transceiver . See “LONWORKS NETWORK TRANSCEIVERS” in section “1. INTRODUCTION”.
In the following steps, identify the two units as “NCB Unit 1” and “NCB Unit 2”.
Switch Settings
Set the switches on the NCB units as follows:
BAUD 1 : 7 BAUD 2 : 0 MODE 1 : 0 MODE 2 : 0
OPTION B Switches 1 through 4 : UP
OPTION A Switches 1 through 4 and 6 through 8 : UP
OPTION A Switch 5 : DOWN
Module Connection
Connect LonWorks network devices to the “NETWORK” connectors of each NCB unit (both RJ-45s
and the terminal strip are in parallel). If using the RJ-45 connector(s), connect to pins 1 & 2 (the rightmost two pins) and use caution, as other pins on these connectors carry DC power.
Connect the NCB units “back-to-back” via the “PORT 1” connector on the rear of each NCB unit
using the supplied null-modem cable.
Connect power to the NCB units via the front panel “DC IN” connector. The units can be powered-up
in any sequence. If power is applied to one unit and not the other, or the serial cable is not attached to
PORT 1 of both units, the “ERR” LED will begin to flash on the powered (or both) unit(s).
Once properly connected and powered, the “ERR” LED will be off on both units and they are now ready for
use. Any LonTalk packets entering one NCB unit will exit the other and vice-versa.
Quick-Start Guide 1
CTI Products, Inc. NCB-AY User Guide
Quick-Start Guide 2
CTI Products, Inc. NCB-AY User Guide
VIRTUAL
ASYNCHRONOUS
CHANNEL
LONWORKS
NODE
LONWORKS
NODE
LONWORKS
NODE
LONWORKS
NODE
NCB-AY
LONWORKS
NODE
LONWORKS
NODE
LONWORKS
NODE
LONWORKS
NODE
BUILDING 1
BUILDING 2
NCB-AY
Read this
section to learn
the general
function and
capabilities of an
NCB Router
1. INTRODUCTION
WHAT IS AN NCB/AY UNIT?
The Network Combiner NCB/AYTM Module is a wide-area router with two
asynchronous serial ports that is used for LONWORKS networks. The NCB/AY
unit is used in pairs to connect LONWORKS networks real-time, spanning
distances from building-wide to worldwide.. With the use of a CSU/DSU, The
communication channel spanning the distance between local networks can be any
digital channel such as fractional T1/E1 or microwave digital channel banks.
Data transfer between distant networks via an NCB module pair is "live", delayed only by the transit time
through the routers and modem connections.
The NCB module uses router technology so that no custom coding or additional hardware is necessary to
seamlessly connect multiple networks across very large distances. The NCB module is self-contained, easily
configured with standard network management tools, and requires no custom programming or coding changes
in system nodes.
Basic Application
A basic application of the NCB module is where two multi-node LonWorks networks, separated by a distance
beyond the reach of conventional wired media, need to be interconnected, as in Figure 1. This distance could be
across a large building, business campus, city, etc. Using the NCB module, this interconnection is
accomplished using one NCB module local to each network site and a single voice-grade telephone circuit
connecting the two NCB modules. Additional networks can be added to this unified network by simply adding
an NCB module pair per network.
Figure 1 Networks in two buildings connected with NCB modules
LonWorks Network Transceivers
The local LonWorks networks at different sites do not need to use the same network transceiver type. For
example, an FTT-10A network, a TPT/XF-78 network, and a PLT-22 network can all be interconnected by
using pairs of NCB modules with network transceivers matching the local network at each site.
1. Introduction 3
CTI Products, Inc. NCB-AY User Guide
LONWORKS
NETWORK
Side
A
ROUTER
LONWORKS
TRANSCEIVER
“DC I N”
Connector
“NETWORK”
Connector
“PORT 1”
Connector
“PORT 2”
Connector
To Modem 1
To Modem 2
Side
B
SMX
TRANSCEIVER
POWER
SUPPLY
CONTROL
NEURON
PROCESSOR
See Appendix F
for Ring Mode
details.
NCB units are available with an option for LonWorks network transceiver type. The ordering code on the rear
of the NCB lists the installed options. This ordering code is of the form: NCB/AY-Txxx, where ‘T’ indicates
the transceiver type.
The following LonWorks network transceiver options are available:
A = FTT-10A K = SMX RS485
B = TPT/XF-78 M = SMX PL22
C = TPT/XF-1250 X = None (SMX ready)
Wide Area Network Ports
Normally Point-to-Point connections are made between pairs of NCB units. A
more fault-tolerant network may be implemented by using the Ring Mode
connection topology.
External Serial Ports
“PORT 1” and “PORT 2” are standard asynchronous serial ports with individually configurable baud rates from
1200 to 115200 bps. An external modem can be connected to each port. “PORT 1” and “PORT 2” pinouts
allow direct connection to a modem via a standard 9 pin to 25 pin cable.
Data Flow
There are three sources of message packets within the NCB module. The first source is the LonWorks
NETWORK connector on the front of the unit. The second is the “PORT” connectors on the rear of the unit.
The third source is the Control Neuron Processor. Message packets originating from any of these sources are
sent to the other two. This message packet flow is shown in the block diagram of Figure 2.
Figure 2 NCB Network Combiner Block Diagram
The “NETWORK” connector attaches to the local LONWORKS network using a compatible transceiver
internal to the NCB module and is associated with Side B of the internal router.
The “PORT” connector attaches to the (Wide Area Network communications channel as the link to the
NCB unit at the other network site and is associated with Side A of the internal router.
The Control Neuron Processor allows network management messages to be sent to the NCB module for
connection control and status monitoring and is associated with Side A of the internal router.
1. Introduction 4
CTI Products, Inc. NCB-AY User Guide
Document
Source
Reference Number
Message Buffer Configuration
CD ROM or www.ctiproducts.com
Technical Note TN010
Usage with Serial Devices that
Emulate the ‘AT’ Modem
Command Set
CD ROM or www.ctiproducts.com
Technical Note TN012
Using Explicit Messages to
Configure and Monitor Dialing
Parameters of an NCB
CD ROM or www.ctiproducts.com
Technical Note TN022
Using NCBCON to Configure
and Monitor Dialing
Parameters of an NCB
CD ROM or www.ctiproducts.com
Technical Note TN023
Setting the PCNSS Card to
Network Interface Mode
CD ROM or www.ctiproducts.com
Technical Note TN024
SMX Transceiver Installation
CD ROM or www.ctiproducts.com
Technical Note TN025
NCB Installation with Network
Management Tools
CD ROM or www.ctiproducts.com
Technical Note TN026
LonWorks Router User’s Guide
Echelon
078-0018-01B
Router Function
The router contained in each NCB module may be configured as a repeater, bridge, or configured router. The
easiest configuration is as a repeater, where all messages which enter the NCB module (via any of the three data
sources described above) are simply passed to the other two sources, regardless of the domain, subnet/node, or
group destination address. A bridge only passes messages that match one of the two domain IDs configured on
the router. A configured router only passes messages that match a domain ID as well as a set of subnet or group
numbers. The proper choice of router mode depends on desired simplicity of installation versus required
system performance.
REFERENCE DOCUMENTS
The following additional information is available from the sources indicated.
1. Introduction 5
CTI Products, Inc. NCB-AY User Guide
1234567
8
ON
OPTION A
DC IN
ERR
ACT
PWR
NETWORK
OUT
IN
RSVC
CSVC
RESET
CMD
NCB
NETWORK COMBINER
NETWORK
LonWorks NETWORK Connections
RJ-45 and Screw Terminal
CMD Button Not Used
CSVC Button Initiates Service Request
from Control Neuron
RSVC Button Initiates Service Request
from Router
RESET Button
DC IN Connector for input power
OPTION A Switches
Selects LonWorks
Addressing parameters.
(See Setup and
Operation for more detail)
PWR LED Indicates correct input power
ERR LED Indicates an error condition
ACT LED Indicates LonWorks packet
activity in router
FRONT PANEL
Figure 3 NCB Front Panel
Front Panel Indicators and Buttons
PWR LED (Green) - Indicates condition of DC input power or a “Wink” command.
Always On: Correct DC input power is present.
Flashing Continuously: DC input to module is below minimum required voltage.
Flashes for 2 Seconds: A “Wink” network management command has been sent to the Control
Neuron Processor.
ERR LED (Red) – Indicates a possible error condition.
Always On: A diagnostic error has been detected. Press the “RESET” button. If the “ERR” LED now
stays off, the EEPROM contained invalid data and has been reinitialized. Any non-volatile
information must be re-entered by using the NCB/Plug Configuration Plug-in or the DOS NCBCON
program. If the LED stays on solid, a hardware problem is indicated. Contact technical support for
assistance.
Slow Flash: (once per second) LonWorks configuration information is insufficient. Using a Network
Management Tool, re-commission the internal router nodes (and optionally, the Control Neuron
Processor node).
Quick Flash: (twice per second) A serial port configured for use (“BAUD” switch set to a value that is
not ‘0’) does not detect an attached modem or is in the process of initializing it. In Ring Mode, this
could also indicate that duplicate Unit Numbers have been detected in the Ring.
ACT LED (Yellow) - Indicates a packet has been passed by the NCB router.
1. Introduction 6
CTI Products, Inc. NCB-AY User Guide
123
4
ON
897
A
B
C
D
E
F01
2
345
689
7
A
B
C
D
E
F01
2
345
689
7
A
B
C
D
E
F01
2
345
6
OPTION B
PORT 2
BAUD 1
BAUD 2
123
4
678
9
5
PORT 1
123
4
678
9
5
897
A
B
C
D
E
F01
2
345
6
MODE 1
MODE 2
MODE 1 and MODE 2 Switches
The NCB-AY unit is always
operated in MODE 0
OPTION B Switches
See Section 2, Step 2 for
more detail.
PORT 1 and PORT 2 Connectors
Asynchronous serial data
BAUD 1 and BAUD 2 Switches
Baud rate selection for Port 1
and Port 2. See Section 2,
Step 2 for more detail.
REAR PANEL
Figure 4 NCB Rear Panel
1. Introduction 7
CTI Products, Inc. NCB-AY User Guide
1. Introduction 8
CTI Products, Inc. NCB-AY User Guide
1234567
8
ON
1. Not Used
2. Not Used
3. Not Used
4. Not Used
5. Control Neuron Addressing Method....... Hardware Network Management Tool
6. Control Neuron Hardware Subnet/Node 255/2 255/1
7. Not Used
8. Not Used
UP DOWN
See Appendix B
for Mounting
Option details.
Follow the steps
in this section to
setup an NCB
Router for the
first time
2. SETUP AND OPERATION
STEP 1. MOUNTING
Non-slip rubber feet are included on all NCB modules to allow them to
conveniently rest on any horizontal surface. Four 6-32 threaded holes are also
available on the bottom of the module to allow bolting of the module in any
convenient orientation. WARNING: Care should be taken to limit protrusion
of the screw into the module to no more than 0.125 inch from the module bottom surface!
Mounting kits are available as options to allow wall or rack (19” EIA) mounting
of the NCB module.
When wall or rack mounting the NCB, a suitable safety and protective earth
ground should be provided to the metal enclosure. The protective earth ground
provides a path to ground for electrostatic discharge (ESD) energy. This
connection is most conveniently made directly to the wall mount bracket or rack plate.
STEP 2. SWITCH SETUP
OPTION A Switches
OPTION A switches set the LonWorks addressing parameters (switches 5 and 6). Leave the unused switches
in the UP position. The position of the OPTION A switches are read by the NCB at module power-up or after
pressing the “RESET” button on the front panel.
Setting the LonWorks Addressing Parameters (Switches 5 and 6)
Switches 5 and 6 provide a simple (but very limited) method of setting the LonWorks domain/subnet/node
address of the internal Control Neuron Processor. This method is useful for systems with two NCB modules,
but does not provide enough flexibility for larger systems. (Standard Network Management Tools are a much
better choice.) For more information on setting this address, see “STEP 4. IMPLEMENTATION IN A NETWORK”
for a tutorial on network management tools.
If OPTION A Switch 5 is UP, Switch 6 determines a static subnet/node address for the Control Neuron
Processor: Switch 6 DOWN fixes the Control Neuron Processor subnet/node address at 255/1 in the
zero-length domain, while Switch 6 UP fixes the subnet/node address at 255/2 in the zero-length
domain. This setting allows for a quick evaluation of the NCB modules, requiring minimal user setup.
2. Setup and Operation 9
CTI Products, Inc. NCB-AY User Guide
1. PORT 1 CTS sense..........................Disabled Enabled(Normal)
2. PORT 1 DSR sense.........................Disabled Enabled (Normal)
3. PORT 2 CTS sense..........................Disabled Enabled (Normal)
4. PORT 2 DSR sense.........................Disabled Enabled (Normal)
DOWN UP
123
4
ON
Signal
Direction
Function
CTS
Input to NCB
Active when the connected device is ready to accept characters from NCB.
This signal is driven by the RTS signal of the connected device.
RTS
Output from
NCB
Active when NCB is ready to accept characters from the connected device.
This signal is received by the CTS signal of the connected device.
DSR
Input to NCB
Active when a connected device is functioning.
This signal is driven by the DTR signal of the connected device.
If driven inactive, NCB front panel “ERR” LED will flash quickly, and NCB
will not communicate with this device.
If DSR signal is not available from connected device, strap to DTR output.
DTR
Output from
NCB
Always driven active by NCB.
Position
Function/Baud Rate
0
Disable Port
1
1200 Baud
2
2400
3
4800
4
9600
5
19200
6
38400
7
57600
8
115200
897
A
B
C
D
EF0
1
2
3
4
56897
A
B
C
D
EF0
1
2
3
4
5
6
BAUD 1
BAUD 2
If OPTION A Switch 5 is DOWN, dynamic determination of the domain/subnet/node number by a
Network Management Tool is allowed.
OPTION B Switches
OPTION B switches set the Serial Port Handshaking options.
CTS/RTS flow control can be used to pace the transmission of individual bytes between the NCB and a
connected device.
DSR/DTR handshaking informs the NCB that a connected device is active. If the channel does not directly
support DSR/DTR handshaking, DSR must be strapped back to the (always active) DTR output signal.
When enabled, the operation of CTS/RTS and DSR/DTR is as follows:
BAUD Switches
“BAUD 1” and “BAUD 2” switches correspond to “PORT 1” and “PORT 2” connectors and allow either
disabling the port for use or enabling it at a specific baud rate.
2. Setup and Operation 10
CTI Products, Inc. NCB-AY User Guide
897
A
B
C
D
EF0
1
2
3
4
56897
A
B
C
D
EF0
1
2
3
4
5
6
MODE 1
MODE 2
NETWORK
OUT
IN
NETWORK
PORT 1
123
4
678
9
5
See APPENDIX C
for pinouts and
cable diagrams.
See Appendix C
for Connector
Details
NOTE: Set the “BAUDn” switch to 0 if the respective port will not be used. This is
important, as the front panel “ERR” LED will flash continuously if a serial port “BAUD”
switch is non-zero and no modem is connected.
Mode Switches
“MODE 1” and “MODE 2” switches allow setting the NCB for compatibility with certain types of external
modems (i.e. dial-up or leased-line). A different type of modem can be connected to each port. NOTE:
previous versions of the NCB-IM unit have only one “MODE” switch. It this case, two modems can still be
connected to a single NCB unit, but they must both be of the same type (either both dial-up or both leased-line).
Set both “MODE” switches to 0 for proper operation of the NCB-AY.
STEP 3. ELECTRICAL CONNECTIONS
LonWorks Network Connection
The local LONWORKS network must be attached to the NCB module via the “NETWORK” connector following
standard Echelon guidelines as to cable type, cable length, and termination appropriate for the selected
transceiver.
The dual RJ-45 “NETWORK” connector allows a
daisy-chained network connection method, as the
network pins of the two RJ-45 connector are directly
paralleled. Note that other pins on the RJ-45 are
connected to circuit ground and DC power.
The 2 pin removable terminal strip is wired in parallel with the network connections
on the dual RJ-45 connector.
NOTE: If your NCB module was purchased without a LonWorks
transceiver (SMX-ready), refer to Technical Note TN025 to install your SMX transceiver.
Asynchronous Channel Connection
Connect the asynchronous communication channel using the “PORT 1”
connector. The minimum set of signals that must be
connected are TXD, RXD, and ground. DTR/DSR
and RTS/CTS should be connected if available on the
channel. (See ‘OPTION B Switches’ information
above for signal details.) If DSR is not available, it must be strapped active by
connecting it to the DTR output of the NCB. If CTS is not available, sensing of it
must be disabled using the OPTION B Switches.
2. Setup and Operation 11
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