RFL Electronics 9831 Installation and user guide

RFL Electronics Inc RFL 9831
[phone] 1 March 8, 2004
RFL Electronics Inc
I N S T R U C T I O N D A T A
RFL 9831 Dual Path Programmable Modem
DESCRIPTION
The 9831 Dual Path Modem is a high performance module suitable for applications on 2-wire or 4-
wire pilot cable systems. It is capable of throughput speeds of up to 9600 baud using v.29 full duplex
communication over a 4-wire pilot cable system.
0
5
1
4
2
3
9
6
8
7
9831
Power
TXD
CTS
RXD
DCD
Mode
Select
CFG
1 2
RFL 9831 MOD
105270
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 2 March 8, 2004
Table of Contents
1. INTRODUCTION............................................................................................................................................................3
1.1. TERMINOLOGY USED IN THIS MANUAL......................................................................................................................3
2. GENERAL .......................................................................................................................................................................4
3. TECHNICAL DESCRIPTION ........................................................................................................................................5
3.1. MECHANICAL DIMENSIONS AND MOUNTING.............................................................................................................5
3.2. THE MODEM CARD.................................................................................................................................................5
3.2.1. Power Supply ...................................................................................................................................................5
3.2.2. Directional Control Logic.................................................................................................................................6
3.2.3. LED Indications ...............................................................................................................................................6
3.3. BACK 9831 I/O CARD ................................................................................................................................................7
3.3.1. Serial Communication Ports.............................................................................................................................8
3.3.2. 4-Wire Line and Power Connectors .................................................................................................................8
3.4. MODEM CARD...........................................................................................................................................................9
3.4.1. Microprocessor and Support Logic ..................................................................................................................9
3.4.2. Transmit and Receive DSP Data Pumps ........................................................................................................10
3.4.3. Analogue Line Circuitry.................................................................................................................................10
3.4.4. Isolating Line Transformers ...........................................................................................................................10
4. MODE SELECTION .....................................................................................................................................................11
4.1. COMMUNICATION MODES .......................................................................................................................................11
4.1.1. Switched or Constant Carrier .........................................................................................................................11
4.1.2. DCD Framing .................................................................................................................................................12
4.1.3. Anti-Collision Provision.................................................................................................................................12
4.2. CONNECTION MODES ..............................................................................................................................................13
4.2.1. Configuration Mode .......................................................................................................................................13
4.2.2. Point to Point Mode (P-P) ..............................................................................................................................14
4.2.3. Multi-drop Master / Slave (M/S)....................................................................................................................14
4.2.4. Redundant Loop (LOOP) ...............................................................................................................................15
4.2.5. Redundant Point to Point................................................................................................................................17
5. CONFIGURATION GUIDE ..........................................................................................................................................18
5.1. JUMPER AND SWITCH CONFIGURATION ..............................................................................................................18
5.1.1. Jumper Configuration.....................................................................................................................................18
5.1.2. Switch Configuration .....................................................................................................................................18
5.2. SOFTWARE CONFIGURATION ...................................................................................................................................19
5.2.1. Overview ........................................................................................................................................................19
5.2.2. Quick Start......................................................................................................................................................20
5.2.3. Main Form Fields ...........................................................................................................................................21
5.2.4. Main Form Buttons ........................................................................................................................................24
5.2.5. Load From File...............................................................................................................................................26
5.2.6. Save To File....................................................................................................................................................26
5.2.7. Upload From Device ......................................................................................................................................26
5.2.8. Download To Device......................................................................................................................................27
5.2.9. Communication Settings ................................................................................................................................27
5.2.10. Errors..............................................................................................................................................................28
6. TROUBLESHOOTING..................................................................................................................................................29
6.1. MODEM PROBLEMS .................................................................................................................................................29
6.2. CONNECTION MODE PROBLEMS ..............................................................................................................................31
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 3 March 8, 2004
1. Introduction
This manual describes the features of the 9831 Dual Path/Redundant Modem and shows the user how to install
and configure the unit for correct operation. This manual is intended for the use of technical personnel
undertaking technical related engineering tasks such as installation, maintenance and configuration.
1.1. Terminology used in this Manual
RTU Remote Terminal Unit
RS232 EIA recommended interface for serial data communication
LED Light Emitting Diode
CPU Central Processing Unit
DTE Data Terminal Equipment
DCE Data Communication Equipment
RTS Request to Send
CTS Clear to Send
DCD Data Carrier Detect
DSR Data Set Ready
DTR Data Terminal Ready
TXD Transmit Data from DTE
RXD Receive Data from DCE
DSP Digital Signal Processor
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 4 March 8, 2004
2. GENERAL
The 9831 Dual Path Modem is a high performance module suitable for applications on 2-wire or 4-wire pilot
cable systems.
The modem module is capable of throughput speeds of up to 9600 baud using V.29 full duplex communication
over a 4-wire pilot cable system. The modem is also compatible with older communication standards such as
V.23 and Bell 202. It only needs to be reconfigured for higher baud rates.
Each modem module contains up to two individual modems for providing the dual path capability. The 9831
modem along with the 9831 I/O module installs in any of the various available standard 98 Series chassis. All
external connections are made to the 9831 I/O module installed at the rear of the 98 chassis.
For system diagnostics, there are LED indications for the status of the link.
Product Highlights
• Installs in any 98 Series Chassis
• LED indication for all data signals
• Front panel modem configuration port
• Two RS 232 serial communication ports
• V.29 9600 baud throughput
• V.23, Bell 202 compatible
• V.22bis 2400 baud throughput
• Point to point, redundant path or master/slave polling operation
• Compression type disconnect terminal for power connections on 9831 I/O
• Compression type disconnect terminals for analog communication lines on 9831 I/O
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 5 March 8, 2004
3. Technical Description
This section describes all technical features of the 9831 Modem in detail and also explains the mounting of the
unit.
3.1. Mechanical Dimensions and Mounting
The 9831 Modem is made up of three different types of cards.
• Modem Card (RFL Part Number 105270)
• Second optional plug-on Modem Board (RFL Part Number 105280)
• Back Connection 9831 I/O Card (RFL Part Number 106140-1)
The 9831 Modem card is contained on a 3RU board, with a front panel width of 1 inch. This card can be
mounted in any standard 98 Series chassis.
The plug-on second Modem Board (if supplied) installs as a daughter board onto the Modem card.
The 9831 I/O card installs in the rear of the 98 Chassis and mates with the 9831 Modem card. All external
connections are made to this 9831 I/O card.
3.2. The 9831 Modem Card (105270)
The modem card accommodates the primary modem, all the LED indications and the directional control logic.
It has accommodations for an optional second modem installed as a plug-on daughter board to the modem card
itself.
3.2.1. Power Supply
The +5 VDC required by the modem card is provided by the 98 Power Supply module installed in the chassis.
This voltage is wired to the modem via the 9831 I/O module (refer to section 3.3.2). The various 98 Power
Supplies available are 24, 48, 125 or 250 VDC and 120 or 220 VAC.
The power supply circuitry on the modem module converts the +5VDC input to the required
–5VDC for the analog circuitry. This function is provided with the use of a small DC/DC Inverter.
The current requirement for the +5 VDC is 300ma.
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 6 March 8, 2004
3.2.2. Directional Control Logic
A redundancy function is provided through directional control logic on the RS-232 ports and 4-wire line. The
control logic depends on the connection mode selected. The connection mode is provided using the BCD rotary
switch.
The connection logic determines the configuration of the following signals:
• Serial RxD
• Serial DCD
• Serial CTS
• Modem 1 Transmit
• Modem 2 Transmit
The details of the control logic are discussed in section 4 on page 11.
3.2.3. LED Indications
The modem card provides multiple LED indications for each of the supplied modems. If the optional second
modem daughter board is not installed, the LEDs for this modem will not be illuminated.
The LED indications for each modem are:
• Green Power LED
• Red Transmit Data (TxD) LED
• Red Clear To Send (CTS) LED
• Red Receive Data (RxD) LED
• Red Data Carrier Detect (DCD) LED
Depending on the current mode of operation, the CTS and DCD LEDs may have varying functions. For more
details on the RTS and DCD modes, please refer to sections 4.1.1 and 4.1.2.
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 7 March 8, 2004
3.3. The 9831 I/O Card (105265-1)
The 9831 I/O card shown below is installed in the rear of the 98 chassis and provides all the external
connections to the Modem card. See 3.3.1 and 3.3.2 for more information.
TB#1 Pin Numbers Description
1 +5 Volts
2 Tone In #2 +
3 Tone In #2 -
4 Tone Out #2 + (2-Wire Tone #2 in/out +)
5 Tone Out #2 - (2-Wire Tone #2 in/out -)
TB#2 Pin Numbers Description
1 Common
2 Tone In #1 +
3 Tone In #1 -
4 Tone Out #1 + (2-Wire Tone #1 in/out +)
5 Tone Out #1 - (2-Wire Tone #1 in/out -)
Pin 1: DCD Out
Pin 2: Rx Out
Pin 3: Tx In
Pin 4: Not Connected
Pin 5: Common
Pin 6: DSR Out
Pin 7: RTS Out
Pin 8: CTS In
Pin 9: Not Connected
MODEM #2 MODEM #1
105265-1
TB1 TB2
1 1
2 2
3 3
4 4
5 5
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 8 March 8, 2004
3.3.1 Serial Communication Ports
The upstream modem is primary modem supplied on the modem card and is connected to the MODEM #1 port
on the 9831 I/O card. The downstream modem is the optional plug-on daughter board and is connected to the
MODEM #2 port on the 9831 I/O card.
Both communication ports MODEM #1 and MODEM #2 are fully compliant with RS232/V.24 and V.28
standards for Data Communication Equipment (DCE). The sockets are 9 pin D-Type female with threaded
studs.
The pin-out for the DB-9 female connectors is shown in the figure in section 3.3.
3.3.2. 4-Wire Line and Input Power Supply Connectors
There are two 5-pin compression type terminal connections for the 4-wire line and power supply connections.
Eight of the ten connections are for the 4-wire lines. This is because the modem module can have up to two 4-
wire connections. These can be one for up-stream and one for down-stream, or one for main path and one for
redundant path.
Two of the ten connections are for the +5 volt power supply input wired from the 98 Power Supply I/O module.
The pin-out for the two 5-pin connectors is shown in section 3.3.
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 9 March 8, 2004
3.4. Modem Card
The modem card provides a single channel of 2-wire or 4-wire communication between itself and another
modem card connected remotely via a 2 or 4-wire connection.
To provide this functionality, the modem card contains the following hardware:
• Microprocessor and Support Logic
• Transmit DSP Data Pump
• Receive DSP Data Pump
• Analog Line Circuitry
• Isolating Line Transformers
Each of these functions is discussed in the following sections.
3.4.1. Microprocessor and Support Logic
The microprocessor and support logic is required to perform the following functions:
• Various Input Baud rates provided
• Formatting of Data Pump transmit and receive data
• Configuration of the Data Pumps for the associated modes
• Intelligence for the different redundancy modes
• Ability to provide store and forward functionality in the system
To provide this functionality, the following hardware is used:
• Atmel 89C8252 Microprocessor
• 128K x 8 Static RAM
• GAL Logic
• Associated buffers
The microprocessor contains 8Kbytes of program FLASH memory and 2Kbytes of data EEPROM for storing
the modem configuration. The FLASH can be programmed in-line, and the EEPROM configuration is
programmed via the configuration utility provided on the PC and downloaded through the serial port.
The 128Kbytes of external SRAM is provided for message buffering and various program variables storage.
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.

RFL Electronics Inc RFL 9831
[phone] 10 March 8, 2004
3.4.2. Transmit and Receive DSP Data Pumps
Two DSP Data Pumps are used to perform all analog modem functions. Each of the data pumps can only
provide half-duplex functionality in certain modes, therefore two data pumps are used to provide full duplex
functionality.
The transmitter data pump takes the formatted data from the microprocessor under interrupt control and the
receive data pump provides raw data for the microprocessor to decode, also under interrupt control.
The configuration that is stored in the data EEPROM is passed from the microprocessor to the data pumps
whenever a mode change is experienced. The configuration is also downloaded to the data pumps on system
startup.
3.4.3. Analog Line Circuitry
The analog line circuitry is required to convert the output signal from the transmitter data pump into valid line
levels for transmission through the isolating line transformer. It also translates the receiver input line signal into
a level and format that the receiving data pump can handle. This circuitry is handled by some Operational
Amplifiers and some passive components to set the levels correctly.
This section also provides the line impedance. The two settings available are 600 ohms and 10K ohms for both
transmit and receive line impedance. The configuration of these parameters is detailed in section 5.1.
3.4.4. Isolating Line Transformers
The line isolating transformers are required on both transmit and receive sides in order to isolate the modem
card from the line. These transformers are 1:1 and provide the two selectable line impedances of 600 ohms and
10K ohms.
Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.