Echelon LonPoint Module User Manual

LonPoint® Module

Hardware and Installation

User’s Guide

Version 2.0



C o r p o r a t i o n

078-0167-01B

078-0167-01B

Echelon, LON, LONWORKS, LonBuilder, NodeBuilder, LonManager, LonTalk,
LONMARK, Neuron, 3120, 3150, LonPoint, the LonUsers logo, the LONMARK logo,
and the Echelon logo are trademarks of Echelon registered in the United States
and other countries. LonSupport and LonMaker are trademarks of Echelon
Corporation.

Other brand and product names are trademarks or registered trademarks of their
respective holders.

Neuron Chips, LonPoint Modules, and other OEM Products were not designed for
use in equipment or systems which involve danger to human health or safety or a
risk of property damage, and Echelon assumes no responsibility or liability for use
of the Neuron Chips or LonPoint Modules in such applications.

Parts manufactured by vendors other than Echelon and referenced in this
document have been described for illustrative purposes only and may not have
been tested by Echelon. It is the responsibility of the customer to determine the
suitability of these parts for each application.

ECHELON MAKES AND YOU RECEIVE NO WARRANTIES OR CONDITIONS, EXPRESS,
IMPLIED, STATUTORY OR IN ANY COMMUNICATION WITH YOU, AND ECHELON
SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.

No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without the prior written permission of
Echelon Corporation.

Model Number 39510

Printed in the United States of America.
Copyright ©1997 - 1999 by Echelon Corporation.

Echelon Corporation
4015 Miranda Avenue
Palo Alto, CA 94304, USA
www.echelon.com

Regulatory Information

FCC NOTICE (for USA only)

Federal Communications Commission Radio Frequency Interference Statement

Warning: 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. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. 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.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.

Safety

UL Listed, per UL-916.
c-UL (CSA) Certified, per C22.2, No. 205

Contents

1 Introduction 1-1

Applications 1-2
Audience 1-4
Content 1-4
Related Documents 1-4

2 Description of the LonPoint Modules and Base Plates 2-1

LonPoint Interface Modules 2-2

LonPoint Interface and Router Module Symbology 2-9

Network Connector 2-9
Front Panel Label 2-9
Service Switch/LED 2-9
Power or Power/Wink LED 2-10
I/O Number 2-10
Digital Input 2-10
Digital Output 2-10
Analog Input 2-10
Analog Output 2-11
Hand/Off/Auto Switch 2-11
Input Status LEDs 2-11
Output Status LEDs 2-11
Router Channel A 2-12
Router Channel B 2-12
Router Activity LED 2-12

3 Network Cabling and Connections 3-1

Network Cabling – TP/FT-10 Channel 3-2

System Performance and Cable Selection – TP/FT-10 Channel 3-4
TP/FT-10 Cable Termination 3-5

Free Topology 3-5

Doubly Terminated Bus Topology Segment 3-6
Terminating Shielded Cables for the TP/FT-10 Channel 3-6
Network Cabling – TP/XF-1250 Channel 3-7

Distribution Rule for TP/XF-1250 Channel 3-7

Terminator for TP/XF-1250 Channel 3-9
I/O Cabling 3-9
Power Cabling 3-9

4 Installation and Wiring of Base Plate 4-1

LonPoint Type 1 Base Plate Installation 4-2

Installing a Compatible Electrical Box 4-5

Connecting Wiring 4-8
LonPoint Type 1D DIN Base Plate Installation 4-9

Connecting Wiring 4-12

Connecting the Jumper Plug(s) 4-13

LonPoint Module Hardware and Installation Guide iii

LonPoint Type 2 Base Plate Installation 4-17

Installing a Compatible Electrical Box 4-20

Connecting Wiring 4-23
LonPoint Type 2D DIN Base Plate Installation 4-24

Connecting Wiring 4-27

Connecting the Jumper Plug(s) 4-29

5 Installing the DI-10 Digital Input Module 5-1

LonPoint DI-10 Digital Input Module 5-2
DI-10 Module Software Settings 5-4
Installing the DI-10 Module 5-4

6 Installing the DIO-10 Digital Input/Output Module 6-1

LonPoint DIO-10 Digital Inpu/Outputt Module 6-2
DIO-10 Module Digital Inputs 6-3
DIO-10 Digital Input/Output Module Software Settings 6-5
DIO-10 Digital Input/Output Module Firmware 6-5
Installing the DIO-10 Digital Input/Output Module 6-5

7 Installing the DO-10 Digital Output Module 7-1

LonPoint DO-10 Digital Output Module 7-2
DO-10 Module Software Settings 7-5
Installing the DI-10 Module 7-5

8 Installing the AI-10 Analog Input Module 8-1

LonPoint AI-10 Analog Input Module 8-2
AI-10 Module Software Settings 8-6
Installing the AI-10 Module 8-6

9 Installing the AO-10 Analog Output Module 9-1

LonPoint AO-10 Analog Output Module 9-2
AO-10 Module Software Settings 9-5
Installing the AO-10 Module 9-4

10 Installing the SCH-10 Scheduler Module 10-1

LonPoint SCH-10 Scheduler Module 10-2
SCH-10 Module Software Settings 10-4
Installing the SCH-10 Module 10-4

11 Installing the LPR Router Module 11-1

LonPoint LPR Router Modules 11-2
Installing the LPR Router 11-5

12 Troubleshooting 12-1

Troubleshooting Table 12-2

Declaration of Conformity

iv Echelon

1

Introduction

The LonPoint System is a family of products designed to integrate both

new and legacy sensors and actuators into cost-effective, interoperable,

control systems for building and industrial applications. Designed to

take best advantage of the LONWORKS® Network Services (LNS)

operating system, LONMARK® interoperability, and the distributed

processing capability of the Neuron® Chip and LonTalk® protocol, the

LonPoint System provides a truly distributed control architecture that

reduces installation time, lowers installation and life-cycle costs, and can

be economically integrated into applications both large and small.

LonPoint Hardware Guide 1-1

Applications

Traditional control networks have been based on an hierarchical architecture using
proprietary controllers. This approach to control system design is expensive, complex,
and locks the customer into a closed, non-interoperable architecture. Ultimately, the
high costs of this design approach limits the market for control systems.

Overcoming the limits of traditional, closed, hierarchical systems is best accomplished
with a flat, fully distributed control architecture. Such a system must: (a) interface
with a broad range of sensors and actuators, (b) incorporate application programs that
blur the distinction between legacy sensors/actuators and intelligent, networked
devices, (c) include a design and installation tool that can seamlessly interconnect
everything in the control network, and (d) incorporate software that simplifies
hardware configuration and reduces commissioning time. Satisfying these diverse
requirements requires a systems approach to the architecture, hardware, and software;
it cannot be accomplished easily with a piecemeal collection of devices and components.

The LonPoint System is the result of just such a systems approach, providing at once
the low cost of a flat system architecture, the multi-user capabilities of the LNS
operating system, the distributed processing of capabilities of the Neuron Chip and
LonTalk protocol, and the wiring flexibility of free topology communications. The
system consists of the LNS-based LonMaker™ for Windows® Integration Tool, the
LonPoint Plug-In, LonPoint application programs, network interfaces, and LonPoint
interface, router, and scheduler modules.

The LonMaker for Windows tool is an LNS-based installation tool with a Visio™ user
interface and support for both LonPoint devices and 3rd party LONWORKS® devices. The
Visio user-interface provides a familiar, CAD-like design environment from which a control
system can be designed. Installation consists of interconnecting function blocks
(LONMARK objects) within LonPoint modules and 3rd party devices, using their
application resources to create a distributed control system. The LonMaker for Windows
tool can be used to design, configure, and commission a distributed control network, yet is
economical enough to be left behind as a maintenance tool. The LonPoint Plug-In is
provided with the tool to simplify the configuration of LonPoint devices.

Resident within each LonPoint module is a powerful, configurable LONMARK
application program. The program includes a variety of function blocks (i.e., PID
Controller, digital encoder, analog output, digital input, type translator) that are
configured by the LonMaker for Windows tool. Linking the function blocks of multiple
LonPoint modules, together with the resources of third pary LONWORKS® devices,
creates a distributed control system that is interconnected via the network, yet which
offers greater functionality, higher reliability, and lower cost than a traditional central
controller-based system. The LonPoint System may be operated as a self-contained
control system, integrated with other LONMARK or LONWORKS devices, or combined
with remote systems and a remote supervisory station via a WAN, IP, or PSTN
network to form a wide area control system.

The LonPoint interface, scheduler, and router modules provide I/O processing,
application resources, timekeeping, and routing for a LonPoint System. The interface

®

1-2 Introduction

modules seamlessly integrate sensors, actuators, and controllers into peer-to-peer,
interoperable networks. There are several different interface modules, including the
DI-10 Digital Input Module (4 digital inputs with a status LED per input), DO-10
Digital Output Module (4 digital outputs with a separate hand/off/auto switch and
status LED per output), DIO-10 Digital Input/Output Module (2 digital inputs, 2 relay
outputs, status LEDs and hand/off/auto switches), AI-10 Analog Input Module (2
independent 16-bit analog inputs), and AO-10 Analog Output Module (2 independent
12-bit analog outputs with PID). The SCH-10 Scheduler Module provides scheduling or
data logging for the system.

LPR Router Modules can be used to create high speed backbones, optimize network
traffic, extend the size of the network, as well as to create bridges to other channels
containing third-party devices. LPR Routers are available in any combination of TP/FT­10, TP/XF-78, and TP/XF-1250 channels.

Many innovative labor-saving features have been built into the LonPoint modules to
minimize installation time:

• A two-piece design allows pre-wiring and cable testing by an electrician prior to
installing the electronics. Technician time can be reserved for tasks such as node
configuration;

• Screw terminals and polarity-insensitive power and network connections
minimize the chance of miswiring;

• All modules operate from 16-30VAC or VDC, allowing the modules to be powered
from the same sources as the sensors and actuators;

• Power and network wiring are “looped” through each base plate, providing
continuity in case of module replacement without network disruption;

• All modules can be hot-plugged, minimizing service time;

• Every module includes a front panel jack that accesses the twisted pair network
without any disassembly, saving time when the network must be accessed for
configuration or maintenance;

• All modules include a front panel bar code with the model, software revision,
and two removable Neuron Chip ID stickers. When placed on the building or
system design plans, these stickers save installation time, especially for
inaccessible nodes.

When used in the context of a complete LonPoint System, the LonPoint modules
provide tremendous flexibility and lower overall equipment, installation, and life-cycle
costs. The modules simplify programming by using a CAD-like design environment,
minimize cabling requirements by using free topology transceivers, and reduce the
need for on-site calls by offering over-the-network downloading. The LonPoint
modules support a flat architecture that is at once interoperable, lower cost to install
and maintain, and flexible enough for future adds, moves, and changes.

LonPoint Hardware Guide 1-3

Audience

This User’s Guide is intended for anyone designing or installing a control network
using LonPoint Modules. Electricians and installation technicians involved with the
physical installation of the cable plant and hardware will find this User’s Guide
sufficient for them to complete their work. Designers and those charged with
commissioning LonPoint Modules, including those who will configure the LonPoint
software, must also review the the user’s guide for the LonMaker for Windows
Integration Tool as well as the LonPoint Application and Plug-In Guide.

Content

This manual provides detailed technical specifications on the electrical and mechanical
interfaces and operating environment characteristics for the LonPoint Modules.

Related Documentation

The following Echelon documents are suggested reading:

SLTA-10 Adapter User’s Guide (078-0160-01)
LONWORKS PCLTA-10 PC LonTalk Adapter User’s Guide (078-0159-01)
LONWORKS PCC-10 PC Card User’s Guide (078-0155-01)
LonManager Protocol Analyzer User’s Guide (078-0121-01)

LonPoint Application and Plug-In Guide (078-0166-01)

LonMaker for Windows User’s Guide (078-0168-01)
Junction Box and Wiring Guidelines for Twisted Pair LONWORKS Networks

(engineering bulletin 005-0023-02)

1-4 Introduction

2

Description of the LonPoint

Modules and Base Plates

This chapter provides a description of the LonPoint Interface, Router, and
Scheduler modules, Type 1 and Type 2 Base Plates, and Type 1D and
Type 2D DIN Base Plates mounting enclosures.

LonPoint Hardware Guide 2-1

LonPoint Interface Modules

The LonPoint Interface Modules are designed to monitor and control a wide variety of
analog and digital sensors and actuators, and are the primary means of interfacing a
LonPoint system to devices that lack an integral LONWORKS interface, i.e., a Neuron
Chip and transceiver. By selecting the correct LonPoint Interface Module and
configuring both its hardware and software correctly, a wide and varied assortment of
sensors and actuators can be supported.

There are five types of LonPoint Interface Modules which share a common form factor
but differ in terms of their I/O and internal software functions. The five modules
include the DI-10 Digital Input Module, DO-10 Digital Output Module, DIO-10 Digital
Input Output Module, AI-10 Analog Input Module, and AO-10 Analog Output Module.

The DI-10 Digital Input Module provides four digital inputs for supervising voltage
ranges 0-5VDC through 0-32VDC or dry contacts. Inputs are isolated from the input
power and the network but not from each other. Separate status LEDs are provided for
each input.

The DO-10 Digital Output Module includes four digital outputs rated at 0-12V, 100mA
source/sink per output, 110mA source, 400mA sink all outputs combined. Outputs are
isolated from the input power and the network but not from each other. Each output
may be separately overridden by a hand/off/auto switch accessible from the front panel.
Separate status LEDs are provided for each output.

The DIO-10 Digital Input Output Module provides two digital inputs and two relay
outputs. The digital inputs include configurable input thresholds for supervising dry
contacts or 5V, 12V, 24V, or 31V DC inputs. In addition, the digital inputs can be set to
measure frequency (20kHz) inputs. The inputs are isolated from the input power and
the network, but are not isolated from each other. Each relay output consists of a Form
A (normally open) and Form B (normally closed) contact which share a common wiper.
The relay contacts are rated for 2A continuous, 6A momentary, at 30VAC or 42VDC.
Each output may be separately controlled by a hand/off/auto switch accessible from the
front panel. Separate status LEDs are provided for each input and output.

The AI-10 Analog Input Module provides two independent 16-bit resolution analog
inputs which are isolated from the input power and the network but not from each
other. Each input can be configured via jumper blocks to monitor RTDs, thermistors,
and other types of analog inputs. Inputs can be separately configured as a voltage input,
resistive transducer input, loop-powered 0-24mA current input, or remote-powered 0­24mA current input. Voltage input ranges can be selected via the LonPoint Plug-in to
be 0-156mV, 0-625mV, 0-10V, or 0-20V. Current input ranges can be set via the
LonPoint Plug-in to be 0-25mA, 0-12.5mA, 0-781µA, or 0-19.5µA. Resolution in the 0­20V range is 0.3mV per step; current input resolution in the 0 - 25mA range is 0.37µA
per step. For resistive transducers, the module includes a configurable current source
which can be set, under software control, to provide either 25µA or 400µA current for
resistance measurement of transducers from 100 to 15k (nominal).

The AO-10 Analog Output Module offers two independent 12-bit resolution analog
outputs. Each output can be separately configured for voltage or current output, and
can drive 0-10V into a 1k load or 0-20mA or 4-20mA @ 0-12V. Outputs are isolated
from the input power and the network but not from each other.

2-2 LonPoint Modules and Base Plates

The LonPoint Interface Modules share a common form factor that includes a front panel

LonPoint™ Interface

assembly to which a printed circuit board (PCB) with active electronics is connected.
The front panel of all of the modules includes a service switch and service LED, a
combination power/wink LED, and a network connector (figure 2.1).}

E

DI-10

MODEL 41100 972
SW VERSION 1.0
ID NUMBER
INPUT: 0-32VDC

DI-10 MODEL 41100 ID NUMBER

DI-10 MODEL 41100 ID NUMBER

U

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L

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LISTED 178K

ENERGY MANAGEMENT

EQUIPMENT SUBASSEMBLY

1
2
3
4

Figure 2.1 LonPoint Interface Module - Typical Front Panel

The rear of the PCB assembly includes a polarized, shrouded, 14-pin interface connector
that connects to a mating socket in a Type 1 Base Plate or Type 1D DIN Base Plate. Any
user-configured jumpers are also located on the rear of the PCB assembly (figure 2.2).

LonPoint Hardware Guide 2-3

Figure 2.2 LonPoint Interface Module - Typical Rear Panel and Jumpers

Network, power, and I/O wiring is connected to screw terminals located on a Type 1
Base Plate (figure 2.3) or Type 1D DIN Base Plate (figure 2.4), into which the LonPoint
Interface Module is plugged; no wiring is ever connected directly to an Interface Module.
A writing space is provided on the back of the Type 1 Base Plate for recording the date
of installation or other pertinent information. Installers should take care to use a fine­point (smudge-free) pen.

Type 1/1D and Type 2/2D Base Plates are keyed to prevent accidental insertion of an
incorrect module type. The Type 1 Base Plate (Model 40111) and the Type 1D DIN Base
Plate (Model 48111) will only accommodate Interface Modules and Scheduler Modules.
The Type 2 Base Plate (Model 40222) and the Type 2D DIN Base Plate (Model 48222)
will only accept LPR-1X Router Modules.

In either Type 1/1D or Type 2/2D Base Plates, the associated module is affixed to the
Base Plate by means of two 8-32, 3/8” screws (Echelon 205-0130-01) that are provided
with each module.

2-4 LonPoint Modules and Base Plates

Figure 2.3 LonPoint Type 1 Base Plate

LonPoint Hardware Guide 2-5

18 17 16 15 14 13 12 11 10

CAUTION

18

17

16 15 14

I/O

1A

13

12 11 10

Front View

Network

1 2

3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

Jumper Plug
(one supplied with
each DIN Base
Plate)

Figure 2.4 LonPoint Type 1D Base Plate

2-6 LonPoint Modules and Base Plates

The Type 1 Base Plate is mounted to either a suitable US 4” square, 2” deep (10.16cm x

5.08cm) electrical box, US double gang electrical box, plastic Echelon EuroBox (figures

2.5-2.7), or an IP-65 (NEMA 4) enclosure.

Figure 2.5 LonPoint Interface Module 4” Square (2” Deep) Electrical Box Mounting Configuration

Figure 2.6 LonPoint Interface Module Double Gang (2” Deep) Electrical Box Mounting Configuration

Figure 2.7 LonPoint Interface Module Eurobox Mounting Configuration

LonPoint Hardware Guide 2-7

The Type 1D DIN Base Plate may be mounted to either a 35mm DIN rail or to a wall
panel (figures 2.8). A jumper plug supplied with the Base Plate permits the power and
network connections of several Type 1D DIN Base Plates to be interconnected without
additional wiring.

Figure 2.8 LonPoint Interface Type 1D Base Plate Mounting Configuration

Prior to installing the base plate, it is important to understand the symbology used on
the base plates, interface modules, and router modules.

2-8 LonPoint Modules and Base Plates

LonPoint Interface and Router Module Symbology

DI-10 MODEL 41100 ID NUMBER

The front and rear panels of the LonPoint Modules and Base Plates contain legends that
identify the function of the module and its various LEDs, switches, and network
connector. A common legend marking scheme is used that allows the module to be
rotated clockwise 90° and still be legible, in the event that the mounting enclosure is
installed off axis. The symbols used are as follows:

Network Connector

Each module includes a network connector for accessing the TP/FT-10 network directly
from the front panel. This feature is intended to allow a laptop PC equipped with a
Model 73200 PCC-10 PC Card and Model 78303 cable assembly to plug into the
LonPoint module and program, monitor, troubleshoot, or update a LonPoint system.
The 3.5mm mating plug is a Hosiden 315-0201-01 miniature phone jack, or equal.

Front Panel Label

U

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c us

DI-10

MODEL 41100 972
SW VERSION 3.0
ID NUMBER
INPUT: 0-32VDC

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LISTED 178K

ENERGY MANAGEMENT

EQUIPMENT SUBASSEMBLY

DI-10 MODEL 41100 ID NUMBER

Every module is supplied with a front panel label that identifies the model number and
software version number of the module. The front panel label also includes two peel-off
Code 39 bar code labels on which are printed the Neuron Chip ID of that module (LPR
modules have two Neuron Chip IDs, one per channel). These labels are intended to
assist the installer during installation time, and may be removed from the module and
placed on installation drawings for reference purposes.

Service Switch/LED

Every module includes a service switch and LED which may be used during module
installation and to identify configured and unconfigured modules.

LonPoint Hardware Guide 2-9

Power or Power/Wink LED

Every module includes either a power LED or a combination power/wink LED. The
wink function is used by a network management/installation tool to visually identify a
particular module; the wink command causes the power LED to blink.

I/O Number

1
2
3
4

Every input and output symbol is accompanied by an I/O Number designating which
hardware input or output the function is associated. The DI-10 has four inputs, the DO­10 has four outputs, the DIO-10 has two inputs and two outputs, the AI-10 has two
inputs, and the AO-10 has two outputs.

Digital Input

This symbol designates the I/O as a digital input and is accompanied by an I/O Number.

Digital Output

This symbol designates the I/O as a digital or relay output and is accompanied by an I/O
Number.

Analog Input

This symbol designates the I/O as an analog input and is accompanied by an I/O
Number.

2-10 LonPoint Modules and Base Plates

Analog Output

0

4

4

This symbol designates the I/O as an analog output and is accompanied by an I/O
Number.

Hand/Off/Auto Switch

1 2 3 4

1 2 3 4

1

1 2

DO-10 Hand/Off/Auto Switch DIO-10 Hand/Off/Auto Switch

The DO-10 and DIO-10 modules include a Hand/Off/Auto switch that allows the user to
determine the mode of operation of the outputs. One three-position switch is provided
for each of the four outputs. The switch positions function as follows:

1 2 3 4

1 Output turned ON (voltage level high or relay actuated)
0 Output turned OFF (voltage level low or relay not actuated)

Output state is determined automatically according configuration programs
loaded into the LonPoint modules on the network.

Input Status LEDs

1
2
3

Input status LEDs indicate the state of the inputs.

Output Status LEDs

1
2
3

Output status LEDs indicate the logical state of the outputs.

LonPoint Hardware Guide 2-11

Router Channel A

A

LPR Routers route packets between two twisted pair channels, designated A and B.

Router Channel B

B

LPR Routers route packets between two twisted pair channels, designated A and B.

Router Activity LED

Indicates that a router is transferring packets from one channel to another.

2-12 LonPoint Modules and Base Plates

3

Network Cabling and Connections

This chapter provides information about network, power, and
input/output cabling for the LonPoint system.

LonPoint Hardware Guide 3-1

Network Cabling - TP/FT-10 Channel

The LonPoint modules (excluding some LPR Routers) use Echelon’s FTT-10A Free
Topology Transceiver for network communications. This transceiver operates at 78
kilobits per second and is designed to support free topology wiring; it will accommodate
bus, star, loop, or any combination of these cabling topologies using a twisted pair cable.
By eliminating restrictions on the cabling topology, the installer is free to locate
LonPoint modules anywhere on the network cabling provided only that the maximum
cabling distance limitations are observed99 This capability simplifies system installation
and makes it easy to add nodes should the network need to be expanded. Figures 3.1
through 3.5 present five typical network topologies.

In free topology cabling it is necessary to use one Echelon Model 44100 terminator.
In bus topology cabling it is necessary to use two Echelon Model 44101 terminators.
Terminators are required for proper network operation and must not be omitted.

Termination

Figure 3.1 Singly Terminated Bus Topology (Model 44100 Terminator)

Termination

Figure 3.2 Star Topology (Model 44100 Terminator)

Termination

Figure 3.3 Loop Topology (Model 44100 Terminator)

3-2 Network Cabling and Connections

Termination

Figure 3.4 Mixed Topology (Model 44100 Terminator)

TerminationTermination

Figure 3.5 Doubly Terminated Bus Topology - Used for Very Long Cabling Distances

(Two Model 44101 Terminators)

A network consisting of LonPoint modules using the FTT-10A transceiver is said to
reside on a “TP/FT-10 channel.” In some cases all of the LonPoint modules will be
connected to a single TP/FT-10 channel. A maximum of 64 devices (LonPoint

modules, routers, PCLTA-10 and PCC-10 PC adapters, third-party LONMARK

®

devices) may be connected to any one channel. If more than 64 devices are to be
used, or if it is necessary to add more cabling than is permitted on a single channel,
then one or more model 42100 LPR-10 Routers (TP/FT-10 to TP/FT-10) would be
placed in series with the network cabling.

Another application for the LPR Router is to limit the amount of network
communications passing between different parts of a control network. For example,
LPR Routers can restrict the transfer of messages from a portion of the network
with many active PID loops to other, more quiescent parts of the network. In this
case one or more model 42100 LPR-10 Routers would be placed in series with the
network cabling.

The LPR Router can also be used to create a high-speed backbone that brings
together many different channels, perhaps to a monitoring PC. In this case it may
be desirable to increase the speed of the backbone channel in order to better manage
the communication traffic. For example, in a highrise building it might be desirable
to have a78 kilobit per second TP/FT-10 free topology channel operating on each
floor, and use a 1.25 megabit per second channel to link together all of the floor
channels with a PC in the basement. In this case, one model 42102 LPR-12 Router
(TP/FT-10 to TP/XF-1250) would be placed on each floor and a separate 1.25Mbps
twisted pair channel would serve as a backbone.

LonPoint Hardware Guide 3-3

The Model 42100 LPR-10 Router (TP/FT-10 to TP/FT-10) uses the TP/FT-10 channel
cabling scheme. The Model 42102 LPR-12 Router (TP/FT-10 to TP/XF-1250) uses a
different cabling scheme that is designed to handle high speed, 1.25Mbps
communications. This 1.25Mbps cabling scheme is described in a later section.

System Performance and Cable Selection - TP/FT-10 Channel

The system designer may choose a variety of cables, depending on cost, availability,
and performance. Currently, Echelon has documented system performance on the
cable types shown in tables 3.1 and 3.2. Up to 64 devices may be connected to each
channel; one or more Model 42100 LPR-10 Routers may be used to increase the
number of devices and cable distance. Network performance specifications assume
that the average wire temperature is +55°C, although individual segments of wire
may be as hot as +85°C.

The free topology transmission specification includes two components which must
both be met for proper system operation. The distance from each LonPoint module,
network interface, or third party device to all other devices, and the distance from
each LonPoint module, network interface, or third-party device to the Model 44100
Terminator, must not exceed the maximum node-to-node distance. If multiple paths
exist, e.g., a loop topology, then the longest path should be used for the calculations.
The maximum total wire length is the total amount of wire connected per channel.

Table 3.1 Free Topology Specifications

Maximum
node-to-node
distance

Belden 85102 500 meters 500 meters 16AWG/1.3mm
Belden 8471 400 meters 500 meters 16AWG/1.3mm
Level IV, 22AWG 400 meters 500 meters 22AWG/0.65mm
JY (St) Y 2x2x0.8 320 meters 500 meters 20.4AWG/0.8mm
TIA Category 5 250 meters 450 meters 24AWG/0.51mm

Maximum total
wire length

Wire Diameter

AWG/mm

3-4 Network Cabling and Connections

If a shielded cable is used, the shield should be connected to earth ground via the
termination circuit shown in the LONWORKS FTT-10A Free Topology Transceiver
User's Guide, version 5 or later.

Distributors of cable are listed in Echelon’s engineering bulletin, Junction Box and
Wiring Guidelines, part number 005-0023-01.

Table 3.2 Doubly-Terminated Bus Topology Specifications

(Requires Two Model 44101 Terminators)

Wire Diameter

Maximum bus length

AWG/mm

Belden 85102 2700 meters 16AWG/1.3mm
Belden 8471 2700 meters 16AWG/1.3mm
Level IV, 22AWG 1400 meters 22AWG/0.65mm
JY (St) Y 2x2x0.8 900 meters 20.4AWG/0.8mm
TIA Category 5 900 meters 24AWG/0.51mm

A doubly-terminated bus may have cable lengths (stubs) of up to 3 meters from the
bus to each LonPoint module, network interface, or third-party device.

TP/FT-10 Cable Termination

The TP/FT-10 channel must be terminated for proper data transmission performance.

Free Topology

If free topology cabling is used then only one Model 44100 Terminator is required and
may be placed anywhere on the free topology segment, as shown in figure 3.6. The
Model 44100 Terminator's orange wires should be connected to the twisted pair
network. The Terminator's green wire must be connected to earth ground. The green
wire must never be connected to the shield of a twisted pair cable.

orange

44100
Terminator

Figure 3.6 Single Termination for Free Topology (Model 44100 Terminator)

green

Network

Termination

LonPoint Hardware Guide 3-5

Doubly Terminated Bus Topology Segment

+

+

If a doubly-terminated bus topology is used, then two Model 44101 terminators are
required, one at each end of the bus, as shown in figure 3.7. The Model 44100
Terminator's orange wires should be connected to the twisted pair network. The
Terminator's green wire must be connected to earth ground. The green wire must
never be connected to the shield of a twisted pair cable.

orange

green

44100
Terminator

orange

green

Network

TerminationTermination

Network

Figure 3.7 Double Termination for Bus Topology (Two Model 44101 Terminators)

Terminating Shielded Cables for the TP/FT-10 Channel

Model 44100 and 44101 Terminators are intended for use exclusively with unshielded
twisted pair cables and must NOT be used as terminators for shielded cables. If a
shielded cable is to be used then special Terminators must be fabricated for both free
topology and bus cabling architectures. These special Terminators will ensure the
effectiveness of the shield in providing noise immunity in electromagnetically harsh
environments. Figure 3.8 presents the schematic for a Free Topology Shielded Cable
termination.

C1 R2 R4

Network
Cable

Terminator

Ground

44101

R1

Network
Cable

Cable
Shield

C2 R3

78.7

1%, 1/8W

R1, R2, R3
R4
C1, C2

ž,

150ž, 1%, 1/8W
100µF±10%, 50V minimum aluminum­electrolytic type (observe polarity)

Figure 3.8 Free Topology Network Terminator for use with Shielded Cables

(Use only one Terminator.)

Figure 3.9 presents the schematic for a Bus Topology Shielded Cable termination.

3-6 Network Cabling and Connections

C1 R2 R4

+

+

Network
Cable

R1

Network
Cable

C2 R3

ž,

316

R1,
R2, R3
R4
C1, C2

1%, 1/8W

ž,

78.7

1%, 1/8W
150ž, 1%, 1/8W
100µF±10%, 50V minimum aluminum­electrolytic type (observe polarity)

Figure 3.9 Bus Topology Network Terminators for use with Shielded Cables (Two Required)

Network Cabling - TP/XF-1250 Channel

If a high-speed backbone is created using the Model 42102 LPR-12 Routers (TP/FT-10
to TP/XF-1250), then a doubly-terminated bus topology using data grade cable that is
intended specifically for this channel must be installed. The TP/XF-1250 channel can
be used only with Level IV, 22 AWG (0.65mm) twisted pair cable, and the channel
must be terminated at each end with a Model 44200 Terminator (do NOT use the
Model 44100 or 44101 Terminators.) Suppliers of cable are listed in Echelon’s
engineering bulletin, Junction Box and Wiring Guidelines, part number 005-0023-01,
Rev D or higher.

Ground

Cable
Shield

Under no circumstances should smaller gauge Level IV cable be substituted for Level
IV, 22 AWG (0.65mm) twisted pair cable. Echelon periodically qualifies new cables for
twisted pair transceivers, and it is advisable to check with Echelon from time to time
to determine if new cables are available. DO NOT attempt to use any other type of
cabling, including but not limited to Category 5 data cabling, or improper or erratic
operation will result.

A maximum of sixty-four (64) Model 42102 LPR-12 Routers (TP/FT-10 to TP/XF-1250), PC
adapters, and other devices can be installed on a backbone channel, with a maximum
cable length of 130 meters with a maximum stub length of 1 feet (0.3m). If additional
cabling or devices must be installed, then one or more model 42105 LPR-15 (TP/XF-1250
to TP/XF-1250) Routers may be placed in series with the backbone cabling.

Distribution Rule for TP/XF-1250 Channel

Due to the transmission characteristics of the TP/XF-1250 channel, communication
failures may result from reflections of the TPT/XF-1250 transceiver’s 1.25Mbps

LonPoint Hardware Guide 3-7

transmitted signal under conditions where devices are concentrated in one point of
cabling. These communication failures are eliminated when devices are used in a

distributed configuration. For this reason, it is essential to follow a simple topology
rule when using the TPT/XF-1250 channel.

Referred to as the “8-in-16” topology rule, this rule requires that no more than 8
devices be connected to the TP/XF-1250 channel within any 16 meter length of cable.
This means that no matter where along the bus the 16 meter measurement is taken,
there should be no more than 8 devices. Figure 3.10 provides a diagram of such a
measurement technique.

Figure 3.10 8-in-16 Topology Rule Example

In the example we see an installation with six groups of devices, varying in size from 2
to 7 devices, in a doubly-terminated bus that is terminated with Model 44200
Terminators. By using a 16 meter measurement stick that we can move from side-to­side over the length of the bus, we can determine whether the 8-in-16 rule has been
met (designated by the word "OK") or violated (shown by the designation "PROBLEM").
In the case of the PROBLEM area, a total of 13 devices are located within a 16 meter
length of the bus, which amounts to five more devcies than are permitted under the 8­in-16 rule.

There are two solutions that can be applied to situations in which the 8-in-16 rule has
been, or must be, violated by virtue of the installation scenario. The first and simplest
remedy is to insert a Model 42105 LPR-15 Router (TP/XF-1250 to TP/XF-1250) and two
Model 44200 Terminators in the bus to break the network into two channels (figure 3.11).
Since each side of the router comprises a different channel, the bus is effectively split and
the nodes divided between two channels.

Figure 3.11 Using a Router to Meet the 8-in-16 Topology Rule

The second remedy to a violation of the 8-in-16 rule is to add additional cable to the
bus such that the rule is no longer violated (figure 3.12). It is important to ensure
that the maximum bus length (130 meters of 22AWG/0.65mm Level IV twisted pair)
is not exceeded by the additional cable. Due to the complex interactions between the
bus and the devcies with regard to reflections and transmission line delays, it is not
possible to substitute an inductor/capacitor network in lieu of the additional cable to
resolve this rule violation.

3-8 Network Cabling and Connections