Bell 5902 User manual

5902 Bell 202 Modem
Hardware Manual
CONTROL
MICROSYSTEMS
SCADA products... for the distance
48 Steacie Drive Telephone: [phone]
Kanata, Ontario Facsimile: 613-591-1022
K2K 2A9 Technical Support: 888-226-6876
Canada 888-2CONTROL

5902 Bell 202 Modem Hardware Manual
October 19, 2007
1
5902 Bell 202 Modem Hardware Manual
©2000 - 2006 Control Microsystems Inc.
All rights reserved.
Printed in Canada.
Trademarks
TeleSAFE, TelePACE, SmartWIRE, SCADAPack, TeleSAFE Micro16 and
TeleBUS are registered trademarks of Control Microsystems Inc.
All other product names are copyright and registered trademarks or trade names
of their respective owners.
Material used in the User and Reference manual section titled SCADAServer
OLE Automation Reference is distributed under license from the OPC
Foundation.

5902 Bell 202 Modem Hardware Manual
October 19, 2007
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Table of Contents
1OVERVIEW.................................................................................................... 5
2INDUSTRY CANADA CERTIFICATION........................................................ 6
3IMPORTANT SAFETY INFORMATION......................................................... 8
4INSTALLATION............................................................................................. 9
4.1 Connecting the Modem.................................................................................. 9
4.2 Field Wiring..................................................................................................10
4.2.1 RS-232 Serial Port..................................................................................10
4.2.2 Terminal Block........................................................................................12
4.2.3 RJ-45 Modular Jack................................................................................12
4.3 Connecting to Dedicated Lines....................................................................12
4.3.1 Four wire mode....................................................................................... 12
4.3.2 Two wire mode ....................................................................................... 13
4.4 Connecting to a Radio ................................................................................. 16
4.4.1 Modem Transmitter Output.....................................................................16
4.4.2 Modem Receiver Input............................................................................16
4.4.3 Key Output.............................................................................................. 16
4.4.4 Radio Carrier Detect Input......................................................................16
4.4.5 Wiring Diagrams.....................................................................................16
4.5 Configuration Switches ................................................................................18
4.5.1 RTS/CTS Delay...................................................................................... 18
4.5.2 Carrier Detect Delay ............................................................................... 19
4.5.3 Carrier Loss Delay..................................................................................19
4.5.4 Anti-Streaming........................................................................................20
4.5.5 Soft Carrier Turn-off................................................................................20
4.5.6 Clear-to-Send Hold Time........................................................................21
4.5.7 Radio Carrier Detect............................................................................... 21
4.5.8 Duplex .................................................................................................... 22
4.5.9 Test Mode Selection............................................................................... 22
5OPERATION................................................................................................ 23
5.1 Full Duplex...................................................................................................23

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5.2 Half Duplex .................................................................................................. 23
5.2.1 Timing Diagrams..................................................................................... 23
5.3 Sample Configurations................................................................................. 26
5.3.1 Full Duplex Back-to-Back Modems.........................................................26
5.3.2 Full Duplex Constant Carrier Master.......................................................26
5.3.3 Half Duplex Slave for Constant Carrier Master....................................... 27
5.3.4 Half Duplex Master Or Slave .................................................................. 28
5.3.5 High Speed Connection to TeleSAFE RTU............................................28
5.3.6 Normal Speed Connection to TeleSAFE RTU........................................29
5.4 System Configuration Procedures ............................................................... 30
5.4.1 Full Duplex Point-to-Point Systems ........................................................ 31
5.4.2 Half Duplex Multi-Point Systems ............................................................31
5.5 Common Problems and Solutions ............................................................... 33
5.5.1 RTS Always On in Half Duplex............................................................... 33
5.5.2 High Error Rate....................................................................................... 33
5.5.3 Modem Receives Data but Never Transmits..........................................34
5.5.4 Other Modems Do Not Receive Data .....................................................34
5.5.5 Bad Data at Start of Message................................................................. 34
5.5.6 Bad Data after End of Message ............................................................. 34
5.5.7 Missing End of Long Message................................................................35
5.5.8 RS LED Always On; All Other LEDs Off................................................. 35
5.5.9 DTE Transmits Too Soon after Receive................................................. 35
5.5.10 CD LED Always On in Master Modem....................................................35
5.5.11 CD LED Always On in Radio System .....................................................36
5.5.12 CD LED Always On in 2 Wire System ....................................................36
5.6 LED Indicators ............................................................................................. 36
5.7 F Option.......................................................................................................37
5.7.1 Supported Communication Parameters..................................................37
5.8 M Option ......................................................................................................38
5.8.1 Carrier Turn Off and the Modbus RTU Protocol.....................................38
5.8.2 M Option Operation ................................................................................ 38
6MAINTENANCE........................................................................................... 40
6.1 Gain Adjustments.........................................................................................40
6.1.1 Transmitter Adjustment .......................................................................... 40
6.1.2 Receiver Adjustment...............................................................................40
6.2 Modem Test Modes ..................................................................................... 40

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October 19, 2007
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6.2.1 Basic Functional Test ............................................................................. 41
6.2.2 Tone Transmission Test......................................................................... 41
6.2.3 Full Duplex Loop Back Test....................................................................42
6.3 Troubleshooting ...........................................................................................42
7SPECIFICATIONS....................................................................................... 44
8APPROVALS AND CERTIFICATIONS ....................................................... 46
Index of Figures
Figure 1: 5902 Module Layout............................................................................................. 9
Figure 2: RS-232 Port Connector (DCE)............................................................................10
Figure 3: RS-232 Wiring - 5902 (DCE) to DTE ..................................................................11
Figure 4: Four Wire Network..............................................................................................13
Figure 5: Two Wire Network ..............................................................................................13
Figure 6: Four Wire RJ-45 Connection...............................................................................14
Figure 7: Two Wire RJ-45 Connection...............................................................................14
Figure 8: Four Wire Terminal Block Connection.................................................................15
Figure 9: Two Wire Terminal Block Connection.................................................................15
Figure 10: Typical Connection to Maxon Radio..................................................................17
Figure 11: Typical Connection to Johnson Radio...............................................................17
Figure 12: Typical Connection to Motorola Radio...............................................................17
Figure 13: Transmit Timing with Soft Carrier Turnoff .........................................................24
Figure 14: Receive Timing without Soft Carrier Turn-off ....................................................25
Figure 15: Receive Timing with Soft Carrier Turn-off .........................................................25

5902 Bell 202 Modem Hardware Manual
October 19, 2007
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1 Overview
The model 5902 Bell 202 modem converts RS-232 signal levels to audio tones for transmission over
radios, two wire networks, four wire multi-point networks, and four wire point-to-point networks.
The modem is transformer isolated from the communication system, so it is well suited to
applications which may experience high voltage transients, static discharges, or high common-mode
voltages.
The 5902 modem is compatible with virtually all types of radio transceivers. Radio communication
is facilitated by an isolated radio transmitter key output, and a radio frequency carrier detect input.
The input can be used to inhibit transmission if a radio signal is detected. Each signal can be wired
for active high or active low signals. Configurable carrier detect and loss delays, and RTS/CTS
delays provide high quality communication in a broad variety of environments.
Multi-point telephone and radio applications are protected against inadvertent sustained
transmission through a user selected anti-streaming timer. This feature prevents a continuously
keyed modem from swamping the communication system.
Configuration switches permit adjustment of carrier detection and loss delays, anti-streaming time,
soft-carrier turn-off tones, RTS/CTS handshake timing, and full/half duplex selection. Self test and
adjustment modes facilitate field maintenance.
Two package versions are available. The model 5902 modem is a DIN rail mounted version for
SmartWIRE TeleSAFE Micro16 and SCADAPack controllers. The model 5902SA is a desktop
version for with personal computers and other RS-232 equipment. This manual covers the 5902
modem.

5902 Bell 202 Modem Hardware Manual
October 19, 2007
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2 Industry Canada Certification
The model 5902 modem is registered with Industry Canada as complying with standard CS02. The
certification number is on a sticker attached to the unit. Industry Canada requires that the following
information be conveyed to the user.
NOTICE: The Industry Canada label identifies certified equipment. This certification means
that the equipment meets certain telecommunications network protective,
operational and safety requirements. Industry Canada does not guarantee the
equipment will operate to the user’s satisfaction.
Before installing this equipment, users should ensure that it is permissible to be connected to the
facilities of the local telecommunications company. The equipment must also be installed using an
acceptable method of connection. The customer should be aware that the compliance with the above
conditions may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility
designated by the supplier. Any repairs or alternations made by the user to this equipment, or
equipment malfunctions, may give the telecommunications company cause to request the user to
disconnect the equipment.
Users should ensure for their own protection that the electrical ground connections of the power
utility, telephone lines and internal metallic water pipe system, if present, are connected together.
This precaution may be particularly important in rural areas.
CAUTION: Users should not attempt to make such connections themselves, but should contact
the appropriate electric inspection authority, or electrician, as appropriate.

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October 19, 2007
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AVIS: L’étiquette de l'Industrie Canada identifie le matériel homologué. Cette étiquette certifie
que le matériel est conforme à certaines normes de protection, d’exploitation et de sécurité
des réseaux de télécommunications. Industrie Canada n’assure toutefois pas que le
matériel fonctionnera à la satisfaction de l’utilisateur.
Avant d’installer ce matériel, l’utilisateur doit s’assurer qu’il est permis de le raccorder aux
installations de l’entreprise locale de télécommunication. Le matériel doit également être installé en
suivant une méthod acceptée de raccordement. L’abonné ne doit pas oublier qu’il est possible que la
conformité aux conditions énoncées ci-dessus n’empêchent pas la dégradation du service dans
certaines situations.
Les réparations de matériel homologué doivent être effectuées par un centre d’entretien canadien
autorisé, désigné par le fournisseur. La compagnie de télécommunications peut demander à
l’utilisateur de débrancher un appareil à la suite de réparations ou de modifications effectuées par
l’utilisateur ou a cause de mauvais fonctionnement.
Pour sa propre protection, l’utilisateur doit s’assurer que tous les fils de mise à la terre de la source
d’énergie électrique, les lignes téléphoniques et les canalisations d’eau métalliques, s’il y en a, sont
raccordés ensemble. Cette précaution est particulièrement importante dans les régions rurales.
AVERTISSEMENT: L’utilisateur ne doit pas tenter de faire ces raccordements lui-même; il doit
avoir recours à un service d’inspection des installations électriques, ou à
un électricien, selon le cas.

5902 Bell 202 Modem Hardware Manual
October 19, 2007
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3 Important Safety Information
Power, input and output (i/o) wiring must be in accordance with Class I, Division 2 wiring methods
Article 501-4 (b) of the National Electrical Code, NFPA 70 for installations in the U.S., or as
specified in Section 18-1J2 of the Canadian Electrical Code for installations within Canada and in
accordance with the authority having jurisdiction.
WARNING !
EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY
IMPAIR SUITABILITY FOR CLASS 1, DIVISION 2.
WARNING !
EXPLOSION HAZARD –WHEN IN HAZARDOUS LOCATIONS, TURN
OFF POWER BEFORE REPLACING OR WIRING MODULES.
WARNING !
EXPLOSION HAZARD - DO NOT DISCONNECT EQUIPMENT
UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS
KNOWN TO BE NONHAZARDOUS.

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4 Installation
The installation of the 5902 modem requires mounting the modem on the 7.5mm by 35mm DIN rail
and connecting the 5902 modem to the system I/O Bus. Refer to the System Configuration Guide,
at the beginning of this manual, for complete information on system layout, I/O Bus cable routing
and 5902 modem installation.
4.1 Connecting the Modem
The 5902 modem is normally connected to the SCADAPack I/O Bus through the I/O Bus
Connectors as shown in figure 1.In this configuration the SCADAPack provides a modem reset
(/RST) signal and a signal to enable the leds (LEDON) on the 5902 modem.
The 5902 modem is also available in a stand alone (SA) configuration. In this configuration the
5902 is not connected to a SCADAPack controller and the modem reset (/RST) signal and a signal
to enable the leds (LEDON) on the 5902 modem are not available. Two jumpers, J1 and J2, are
included to enable these signals on the 5902SA modem. Figure 1: 5902 Module Layout shows the
location of the jumpers.
5902 Modem
Remove jumper at J1 (/RST).
Remove jumper at J2 (LEDON).
5902SA Modem
Install jumper at J1 (/RST).
Install jumper at J2 (LEDON).
Status LEDs
I/O Bus
Connector
I/O Bus
Connector
RJ-45 Jack
RS-232 DCE
Connector
+ –
Tx/Rx
Termination
Block
Configuration
Switches
+ –
Rx
+ –
KEY
+ –
RCD
LEDON Jumper (J2)
/RST Jumper (J1)
RX Gain
Adjustment
TX Gain
Adjustment
TX Gain Jumper (J3)
Figure 1: 5902 Module Layout