Xantrex Internal M9B-HFS Series User manual

TM-9BHF-XFXN
Technical
Manual for
Internal M9B-HFS Serial Interface
for XFR Series Power Supply

The information contained in this document is confidential and is the exclusive property of Xantrex Technology Inc. It may not
be disclosed to any person without the express written consent of Xantrex Technology Inc. Printed in Canada

M9B-HFS INTERFACE ABOUT THIS MANUAL
Release 1.0 (97/10) i
ABOUT THIS MANUAL
This technical manual is for the M9B-HFS Interface, a microprocessor-controlled option card for all models of
1200 Watt and 2800 Watt DC output power supplies. This manual provides you with specifications, user
options, and configuration instructions for the interface, along with a command set which will enable you to
control your power supply from a computer console. Error messages, calibration procedures, schematics, and
parts lists are also included.
This manual is designed for the user who is familiar with basic electrical laws especially as they apply to the
operation of power supplies. This implies a recognition of Constant Voltage and Constant Current operation
modes and the control of input and output power, as well as the observance of safe techniques while effecting
supply or pin connections and any changes in switch settings. The user should also have experience with a
computer-based communications software package.
Refer to the 1200 Watt and 2800 Watt DC power supply technical manual for installation, configuration, and
operating procedures for the power supply.
The six major sections in this manual are:
Section 1. Features Describes the interface and lists its features.
Section 2. Inspection and Details the inspection of the interface card and basic setup
Configuration procedures.
Section 3. M9B-HFS Operation Lists the complete command set, status registers, and error codes.
Section 4. Calibration Provides procedures for voltage and current mode calibration as
well as Over Voltage Protection (OVP) calibration.
Section 5. Maintenance Covers troubleshooting and lists replacement parts.
Appendix A: Specifications Contains specifications on the 2800 Watt and 1200 Watt DC output
power supply with M9B-HFS interface installed .
Appendix B: Schematics Contains M9B-HFS interface printed circuit board schematic.
Manual Revisions
The current release of this manual is listed below. Insert pages will update already printed manuals. Reprinted
manuals may note any minor corrections and additions on the Manual Changes list (page ii). A new release of
the manual is identified by a new release number and printing date and will include all of the additional or
corrected information since the last release.
Release 1.0 (97/10/14)
Warnings, Cautions, and Notes
Warnings, cautions, and notes are defined and formatted as presented below.
Note: Describes additional operating information which may affect the performance of the equipment.
WARNING
Describes a potential hazard which could result in injury or death, or a
procedure which, if not performed correctly, could result in injury or death.
CAUTION
Describes a procedure which, if not performed correctly, could result in damage
to data, equipment, or systems.

MANUAL CHANGES M9B-HFS INTERFACE
ii Release 1.0 (97/10)
MANUAL CHANGES
There are no changes at this time.

M9B-HFS INTERFACE CONTENTS
Release 1.0 (97/10) iii
CONTENTS
About This Manual .....................................................................................................................................................i
Manual Changes ..........................................................................................................................................................ii
Table of Contents .........................................................................................................................................................iii
List of Tables ................................................................................................................................................................v
List of Illustrations .......................................................................................................................................................v
1. FEATURES
1.1 Introduction to the Interface ........................................................................................................................1-1
1.2 Features and Functions ................................................................................................................................1-2
1.2.1 Features ................................................................................................................................................1-2
1.2.2 Programmable Functions ...................................................................................................................1-2
1.2.3 Readback Functions ...........................................................................................................................1-2
2. INSPECTION AND CONFIGURATION
2.1 Initial Inspection ............................................................................................................................................2-1
2.2 M9B-HFS Setup Procedure ..........................................................................................................................2-2
2.3 S1 Switch Communication Settings ............................................................................................................2-4
2.3.1 Baud Rate Selection ...........................................................................................................................2-4
2.3.2 Flow Control ........................................................................................................................................2-4
2.4 Connecting the Fiber Optic Line .................................................................................................................2-5
2.4.1 Fiber Optic Cable ................................................................................................................................2-5
2.4.2 Fiber Optic Serial Interface ................................................................................................................2-5
2.5 Power ON Conditions ...................................................................................................................................2-6
2.5.1 Default Conditions .............................................................................................................................2-6
2.5.2 Remote Enable (REN) .........................................................................................................................2-6
2.5.3 Local Lockout (LLO) ..........................................................................................................................2-6
2.6 Computer Settings .........................................................................................................................................2-7
2.7 Internal Jumper Selections ...........................................................................................................................2-7
2.7.1 OVP Control Selection .......................................................................................................................2-7
2.7.2 TTL Shutdown ....................................................................................................................................2-9
2.7.3 Local Mode Disable ...........................................................................................................................2-9
2.8 J7 User Signal Connector .............................................................................................................................2-10
2.8.1 J7 Cable Connection ...........................................................................................................................2-10
3. M9B-HFS OPERATION
3.1 Command Syntax ...........................................................................................................................................3-1
3.1.1 Manual Conventions .........................................................................................................................3-1
3.1.2 Command Format and Parameters ....................................................................................................3-1
3.1.3 Command Strings ................................................................................................................................3-3
3.1.4 Command Terminators .......................................................................................................................3-3
3.1.5 Order .....................................................................................................................................................3-3
3.2 Command Summary .......................................................................................................................................3-3
3.3 Command Reference ......................................................................................................................................3-5
3.4 Accumulated Status, Status, and Fault Registers ....................................................................................3-13
3.5 Error Codes .....................................................................................................................................................3-14

CONTENTS M9B-HFS INTERFACE
Release 1.0 (97/10)
iv
4. CALIBRATION
4.1 Introduction ....................................................................................................................................................4-1
4.2 Voltage Mode Calibration ............................................................................................................................4-1
4.2.1 Voltage Calibration Setup Procedure ...............................................................................................4-1
4.2.2 Voltage Program Calibration Procedure ..........................................................................................4-2
4.2.3 Voltage Readback Calibration Procedure ........................................................................................4-2
4.3 Current Mode Calibration .............................................................................................................................4-3
4.3.1 Current Calibration Setup ..................................................................................................................4-3
4.3.2 Current Program Calibration Procedure ...........................................................................................4-3
4.3.3 Current Readback Calibration Procedure ........................................................................................4-4
4.4 Over Voltage Protection (OVP) Calibration ...............................................................................................4-4
5. MAINTENANCE
5.1 Introduction ....................................................................................................................................................5-1
5.2 Troubleshooting ............................................................................................................................................5-1
5.2.1 Diagnostic LEDs .................................................................................................................................5-1
5.3 Replaceable Parts ...........................................................................................................................................5-1
5.3.1 Parts Replacement and Modifications .............................................................................................5-1
5.3.2 Ordering Parts .....................................................................................................................................5-2
5.3.3 M9B-HFS PCB Replaceable Parts ....................................................................................................5-2
5.3.4 Fiber Optic Cable Assembly Parts ...................................................................................................5-4
APPENDIX A: SPECIFICATIONS
A.1 XFR 1200 Watt Series Supplies with M9B-HFS Interface Installed.....................................................A-1
A.2 XFR 2800 Watt Series Supplies with M9B-HFS Interface Installed.....................................................A-2
APPENDIX B: SCHEMATICS
B.1 XS-9BHF PCB ...............................................................................................................................................B-1

M9B-HFS INTERFACE CONTENTS
Release 1.0 (97/10)
v
List of Tables
Table 2.2-1 M9B-HFS Setup Procedure ....................................................................................................................2-2
Table 2.3-1 S1 Switch Settings for Baud Rate Selection .........................................................................................2-4
Table 2.3-2 S1 FLOW Switch Setting for Flow Control ..........................................................................................2-4
Table 2.4-1 Receiver/Transmitter Pair ........................................................................................................................2-5
Table 2.5-1 Remote Mode Power On Default Settings ...........................................................................................2-6
Table 2.5-2 Remote Enable (REN) Command ............................................................................................................2-6
Table 2.6-1 Power Supply Settings ............................................................................................................................2-7
Table 2.7-1 OVP Control Mode Selection .................................................................................................................2-7
Table 2.7-2 Switch Settings for TTL Shutdown Circuit Logic ...............................................................................2-9
Table 2.7-3 Local Mode Disable Jumper J104 Selection .........................................................................................2-9
Table 3.1-1 Command Parameters ..............................................................................................................................3-2
Table 3.1-2 Floating Point Numbers ..........................................................................................................................3-2
Table 3.2-1 Programming Commands ........................................................................................................................3-3
Table 3.2-2 Query Commands .....................................................................................................................................3-4
Table 3.2-3 Calibration Commands ............................................................................................................................3-4
Table 3.2-4 Status Commands ....................................................................................................................................3-4
Table 3.4-1 Accumulated Status, Status, and Fault Registers ...............................................................................3-13
Table 3.5-1 Error Codes ...............................................................................................................................................3-14
Table 5.3-1 M9B-HFS Interface PCB Replaceable Parts .........................................................................................5-2
Table 5.3-2 Fiber Optic Connection Parts .................................................................................................................5-4
Table A-1 Electrical Specifications for the 1200 Watt Supplies
7.5 Volt to 60 Volt Models (HFS Installed) .........................................................................................A-1
Table A-2 Electrical Specifications for the 1200 Watt Supplies
100 Volt to 600 Volt Models (HFS Installed) ......................................................................................A-1
Table A-3 Electrical Specifications for the 2800 Watt Supplies
7.5 Volt to 60 Volt Models (HFS Installed) .........................................................................................A-2
Table A-4 Electrical Specifications for the 2800 Watt Supplies
100 Volt to 600 Volt Models (HFS Installed) ......................................................................................A-2
LIST OF ILLUSTRATIONS
Figure 1.1-1 Sample Configuration using HFS-M9B Interface ..............................................................................1-1
Figure 2.2-1 Front Panel ...............................................................................................................................................2-3
Figure 2.2-2 M9B- HFS Interface Subplate ...............................................................................................................2-3
Figure 2.4-1 Sample Configuration of a Fiber Optic Connector .............................................................................2-5
Figure 2.7-1 M9B-HFS Interface PCB ........................................................................................................................2-8
Figure 2.8-1 J7 Connector and Pin Settings ..............................................................................................................2-10
Figure 2.8-2 J7 User Cable with Ferrite Block ...........................................................................................................2-10
Figure 4.2-1 Voltage Calibration Setup ......................................................................................................................4-1
Figure 4.3-1 Current Calibration Setup ......................................................................................................................4-3

M9B-HFS INTERFACE FEATURES
Release 1.0 (97/10) 1-1
1. FEATURES
1.1 Introduction to the Interface
The M9B-HFS Interface is a microprocessor-controlled option card for the 1200 Watt or 2800 Watt model power
supply. Installed internally, the M9B-HFS gives you remote digital control of simple test systems. It has 16-bit
resolution for programming and readback and uses bit serial protocol for sending data between the computer and
the interface. The fiber optic link provides electrical isolation between the host computer and the power supply.
Electrical isolation reduces the impact of noise on communications to the power supply and improves signal
quality.
The M9B-HFS features an extensive command set and several user-programmable features. In addition to fiber
optic cable and a computer interface, this remote control application requires a computer-based communications
software package such as PROCOMM, XTALK, Windows Terminal Program or equivalent communications
software. You can also use low level or high level language programs to control your system. The M9B-HFS is
an ideal tool for reliable, remote power supply control of research and development applications.
Figure 1.1-1Sample Configuration using HFS-M9B Interface
(2800 Watt Power Supply Rear Panel Shown)
Computer Controller
M9B-HFS Option Card
Fiber Optic Lines
Fiber Optic Connector

FEATURES M9B-HFS INTERFACE
Release 1.0 (97/10)1-2
1.2 Features and Functions
1.2.1 Features
• Fiber optic receiver/transmitter pair
• 16-bit programming and readback of voltage and current
• Programmable soft limits for voltage and current
• Programmable over voltage protection with reset
• Easy-to-use, self-documenting command set
• Standardized commands for complete communication with any of the supplies in the system
• User-programmable isolated fault, polarity, isolation, and auxiliary, user-defined output signals
• LED status signals: error, address, remote/local operation, and over voltage protection
• Foldback in CV or CC mode with reset
• Software calibration
• Software communications flow control
• Asynchronous full duplex data rate of 9600 baud
1.2.2 Programmable Functions
• Output voltage and current
• Soft limits for voltage and current
• Over voltage protection
• Output enable/disable
• Maskable fault interrupt
• Hold and trigger
• Output relay signals
1.2.3 Readback Functions
• Actual voltage and current
• Voltage and current settings
• Soft voltage and current limits
• Over voltage protection setting
• Present and accumulated power supply status
• Programming error codes
• Fault codes
• Power supply model and software version identification

M9B-HFS INTERFACE INSPECTION AND CONFIGURATION
Release 1.0 (97/10) 2-1
2. INSPECTION AND CONFIGURATION
2.1 Initial Inspection
CAUTION
If you remove the unit's cover, use proper static control techniques to avoid
damage to static-sensitive components on the printed circuit board.
The M9B-HFS interface card typically comes pre-installed if you have ordered the interface with a power supply.
If you have ordered the interface separately, your sales/service representative can ensure it is correctly installed
in your previously -purchased power supply.
On first receiving your unit, perform a quick physical check.
1. Ensure each package contains a power supply with its M9B-HFS Interface board installed and manuals
for the power supply and the M9B-HFS Interface. Any additional parts shipped with the power supply
will be identified in the supply's documentation.
2. Inspect the unit for any signs of physical damage such as scratches, cracks, or broken switches,
connectors, and displays.
3. Check the printed circuit board and components if you suspect internal damage.
If the unit is damaged, save all packing materials and notify the carrier immediately.
To configure your M9B-HFS interface card for remote operation, refer to the setup procedure in Section 2.2 M9B-
HFS Setup Procedure .

INSPECTION AND CONFIGURATION M9B-HFS INTERFACE
2-2 Release 1.0 (97/10)
2.2 M9B-HFS Setup Procedure
To use this product, you must have the following equipment:
• Two fiber optic cables, or one duplex fiber optic cable (for receiving and transmitting)
• Computer with a fiber optic serial interface
• Computer-based communications software package
• 1200W or 2800W variable DC output power supply with M9B-HFS interface installed
You can configure the M9B-HFS option for operation in four simple steps. Follow all steps in Table 2.2-1 M9B-
HFS Setup Procedure in the order provided.
Table 2.2-1M9B-HFS Setup Procedure
Step # Procedure References
1Set the back panel S1
Communication Switch for operation. See Section2.3 S1 Switch Communication Settings
for information on setting the Baud Rate and Flow
control for the interface.
2Install the fiber optic lines between
the computer and the interface. See Section2.4 Connecting the Fiber Optic Line for information on the fiber optic connector.
3Power ON the power supply. See Section 2.5 Power ON Conditions for information
on power supply default settings and remote
operation.
4Set the command protocol for the
computer. See Section2.6 Computer Settings. The computer and the interface must share the same serial
settings to ensure proper communication.
For additional interface functions, see Section 2.8 J7 User Signal Connector and Section 2.7 Internal Jumper
Selections .

M9B-HFS INTERFACE INSPECTION AND CONFIGURATION
Release 1.0 (97/10) 2-3
Figure 2.2-1Front Panel
(2800 Watt DC Power Supply shown)
Figure 2.2-2M9B- HFS Interface Subplate
(Located on the Power Supply Rear Panel)
J7 User Signal Connector
Transmitter LED
Fiber Optic
Receiver Port
Remote Programming LED (REM)
Addressed LED
Error LED
Fiber Optic
Transmitter Port
Return to Local Button
(LOCAL)
Addressed LED (ADR)
Error LED (ERR) Polarity LED (POL)
Fault LED (FLT)
1 Baud rate selection (B3)
2 Baud rate selection (B2)
3 Baud rate selection (B1)
4 Flow control selection (FLOW)
5-8 Not used
Receiver LED
S1 Communication Switch

INSPECTION AND CONFIGURATION M9B-HFS INTERFACE
2-4 Release 1.0 (97/10)
2.3 S1 Switch Communication Settings
2.3.1 Baud Rate Selection
Serial transmission sends and receives data in bit streams at fixed bit rates. Both the computer and the interface
must have the same bit rate setting for proper communication. Use switches B3, B2, and B1 on the rear panel S1
switch to select the power supply's rate of transmission in bits per second. Switch settings are summarized in
Table 2.3-1. Refer to Figure 2.2-2 for a drawing of the rear panel subplate.
Note: When resetting switches B3, B2, and B1 during a working session, turn the power supply OFF and then
ON again to ensure that the new settings are put into effect.
Switch OPEN=0 (OFF) Switch CLOSED=1 (ON)
Table 2.3-1S1 Switch Settings for Baud Rate Selection
BAUD Rate B3 B2 B1
9600 1 1 1
4800 0 1 1
2400 1 0 1
1200 0 0 1
600 1 1 0
300 0 1 0
150 1 0 0
75 0 0 0
2.3.2 Flow Control
Flow control signals regulate data flow for proper communication. The M9B-HFS Interface card uses XON/XOFF
protocol to monitor and report on the status of the transmission between devices. You can select flow control
using the back panel S1 switch. Set the S1-FLOW switch to ON to invoke flow control. Set S1-FLOW to OFF to
disable flow control.
Table 2.3-2S1 FLOW Switch Setting for Flow Control
S1-4 Setting Flow Control Setting
ON Software Flow Control enabled
OFF Flow Control disabled
XON/XOFF
This software protocol uses special characters that synchronize device communications. The device sends the
control code XOFF (ASCII value 13 hex) when it is not ready to receive data. The device sends the control code
XON (ASCII value 11 hex) when it is ready to resume receiving data.

M9B-HFS INTERFACE INSPECTION AND CONFIGURATION
Release 1.0 (97/10) 2-5
2.4 Connecting the Fiber Optic Line
To connect the option card to a computer, you need:
• two fiber optic cables, or one duplex fiber optic cable (for receiving and transmitting)
• a computer with a fiber optic serial port
2.4.1 Fiber Optic Cable
The maximum fiber optic cable length for connecting the M9B-HFS option card to a computer is 20 meters. This
length is dependent on the type of fiber optic cable used. The M9B-HFS uses a Hewlett Packard (HP)
receiver/transmitter pair with HP part numbers shown in Table 2.4-1. Select the fiber optic cable best suited for
use with these parts.
Table 2.4-1Receiver/Transmitter Pair
Description HP Part #
Fiber optic receiver HFBR-1521
Fiber optic transmitter HFBR-2521
You need two fiber optic lines: one for transmitting and one for receiving. These cables connect to the interface
at the Rx and Tx ports on the rear panel subplate.
2.4.2 Fiber Optic Serial Interface
You will need a fiber optic serial port to connect the fiber optic line to your computer. The fiber optic serial port
must have both receiver and transmitter connections for the fiber optic cable. You can use an RS232 interface
with the M9B-HFS by using a fiber-to-RS232 serial adapter. See Section 5.3.4 for more information on obtaining
parts for fiber optic connections.
Standard fiber optic cable assembly and fiber to serial adapters are available from your electronics/computer
equipment supplier.
Figure 2.4-1Sample Configuration of a Fiber Optic Connector
(Duplex connector shown)
Tx
(on subplate rear panel)
Rx
(on subplate rear panel)
Duplex Connector
(Optional)
Fiber Optic Lines

INSPECTION AND CONFIGURATION M9B-HFS INTERFACE
2-6 Release 1.0 (97/10)
2.5 Power ON Conditions
2.5.1 Default Conditions
The M9B-HFS Interface is configured to operate in remote mode when powered on. The default command setting
Remote Enable (REN) ON enables remote digital control of the supply. With REN ON, the supply will respond to
any command you send from the computer.
To select local mode, either press the front panel LOCAL button or send the Go To Local (GTL) command from
the computer. The power supply will return to remote mode if a programming command is sent to it from the
computer.
The default power ON settings are shown in Table 2.5-1. You can change these settings using the software
commands shown in Section 3.3.
Table 2.5-1Remote Mode Power On Default Settings
Condition Default Software Command Setting
Remote Enable ON REN ON
Voltage 0 Volts VSET 0
Current 0 Amps ISET 0
Soft Voltage Limit VMAX (see models) VMAX (supply's voltage limit)
Soft Current Limit IMAX (see models) IMAX (supply's current limit)
OVP Trip Voltage Model VMAX + 10% OVSET (voltage limit + 10%)
Delay 0.5 seconds DLY 0.5S
Foldback Protection OFF FOLD OFF
Output ON OUT ON
Hold OFF HOLD OFF
Unmask NONE UNMASK NONE
AUXA OFF AUXA OFF
AUXB OFF AUXB OFF
2.5.2 Remote Enable (REN)
The remote enable command REN controls the remote mode switching of the power supply. The default setting
is REN ON. REN ON enables remote digital mode, returning the power supply to remote digital control whenever
a command is sent from the computer. REN OFF disables remote digital operation. When set at REN OFF, power
supply control is at the front panel or at the back panel J2 connector. To check the state of remote enable, use
the REN? query command.
Table 2.5-2Remote Enable (REN) Command
Condition Power Supply Control
REN OFF Local control only
REN ON Responds to software commands
2.5.3 Local Lockout (LLO)
The local lockout (LLO) command disables the front panel LOCAL button. With LLO in effect, you cannot return
to local control using the front panel LOCAL button. To return to local mode, use the GTL command. The
command REN OFF turns off the LLO condition and returns the power supply to local mode.

M9B-HFS INTERFACE INSPECTION AND CONFIGURATION
Release 1.0 (97/10) 2-7
2.6 Computer Settings
For serial communication, the computer and the power supply must share the same communication settings.
Make sure that the settings of the computer and of the power supply agree with those shown in Table 2.6-1.
Table 2.6-1Power Supply Settings
Parameter Setting
Transmission Asynchronous
Mode Full duplex
Baud rates 75, 150, 300, 600, 1200, 2400, 4800, 9600
Parity None
Start Bit 1
Stop Bit 1
Data Bits 8
Flow Control XON/XOFF, None
2.7 Internal Jumper Selections
CAUTION
If you remove the unit's cover, use proper static control techniques to avoid
damage to static-sensitive components on the printed circuit board.
Remote operation options OVP control, TTL Shutdown, and Local Mode Disable are selected by changing
jumper positions on the M9B-HFS PCB. Refer to the operating manual for information on how to use over
voltage protection and TTL shutdown.
2.7.1 OVP Control Selection
Over voltage protection (OVP) on the M9B-HFS Interface is set at the factory for remote software operation.
When operating the power supply in remote mode, you control the OVP trip level using the OVSET software
command. If you return the power supply to local operation by using the REN software command or the front
panel LOCAL button, control of the OVP trip level switches to the front panel OVP potentiometer. The default
OVP trip level is set as 110% of the power supply's rated output voltage. See Table 2.5-1 for a complete list of
remote power ON default settings.
You can change the location of OVP control by changing the positions of the OVP Control jumper J66 and the
Local Mode Disable jumper J104, both on the M9B-HFS PCB. The default jumper settings allow control of OVP
to depend on the operating state of the power supply. By physically changing the jumper settings, you can
isolate the location of OVP control to just software control or just front panel control. Table 2.8-1 shows a table
of jumper settings and OVP programming selection. Refer to Figure 2.7-1 for the positions of the jumpers on the
M9B-HFS PCB.
Note: Jumper J104 affects more than just the location of OVP control. See Section 2.7.3 Local Mode Disable
before applying changes to jumper J104.
Table 2.7-1OVP Control Mode Selection
PCB Jumper J66 Position PCB Jumper J104 Position OVP Programming Selection
Closed (default) Closed (default) Software or Front Panel OVP control
(dependent on the power supply operating
state)
Closed Open Software OVP control only
Open Closed Front Panel OVP control only
Open Open Front Panel OVP control only

INSPECTION AND CONFIGURATION M9B-HFS INTERFACE
2-8 Release 1.0 (97/10)
CAUTION
Use proper static control techniques to avoid damage to static-sensitive
components on the printed circuit board.
JUMPER SELECTION
J66 OVP Control Selection [closed] (default) See Table 2.7-1
[open] Front panel OVP control
J92 User TTL Shutdown (S/D) Selection [1-2] User TTL S/D line active low
[2-3] User TTL S/D line active high [default]
J104 Local Mode Disable Selection [closed] (default) See Section 2.7.3
[open] See Section 2.7.3
Note:All other jumpers are not user-selectable.
LED INDICATORS
CR97 Red Diagnostic LED Bus error or soft restart on Slave circuitry
CR163 Red Diagnostic LED Soft restart on Master circuitry
CR164 Green Diagnostic LED Bus error on Master circuitry
EPROMS
U120 Slave EPROM See revision number stamped on EPROM.
U210 Master EPROM See revision number stamped on EPROM.
CONNECTORS
J1 Front Panel A1 PCB Interconnect
J7 User Signals Connector
J65 A2 Control PCB Interconnect
U222 Fiber Optic Transmit Connector
U223 Fiber Optic Receive Connector
Figure 2.7-1M9B-HFS Interface PCB

M9B-HFS INTERFACE INSPECTION AND CONFIGURATION
Release 1.0 (97/10) 2-9
2.7.2 TTL Shutdown
You can use the Shutdown function to disable or enable the supply's output. Disabling the supply using TTL
shutdown allows you to make adjustments to the load or the power supply without shutting down the power
supply. With the M9B-HFS interface installed, TTL shutdown is activated by a TTL signal to Pin 1 of the J7
connector on the interface subplate.
You can select the logic level of the TTL input by changing the J92 connector on the M9B-HFS PCB. Table 2.7-2
shows the TTL signal levels for the J92 jumper settings. See Figure 2.7-1 for the location of the J92 jumper on the
printed circuit board.
Table 2.7-2Switch Settings for TTL Shutdown Circuit Logic
PCB Jumper J92 Position TTL Signal Level Supply Output Condition
Pin 2 to Pin 3 HIGH
LOW OFF ON
Pin 1 to Pin 2 HIGH
LOW ON OFF
2.7.3 Local Mode Disable
You can disable local control of the power supply by removing jumper J104 on the option card PCB. We
recommend that you remove jumper J104 only if you never plan to control the power supply from the front panel.
Otherwise, the software commands and the front panel return to local (LOCAL) button will offer you greater
flexibility in controlling your supply.
When the Local Mode Disable jumper J104 is closed, you can select between operating the power supply in
either local mode or remote mode by using the software commands and the front panel return to local (LOCAL)
button. With jumper J104 open, you can only operate the power supply in remote mode. Opening the J104 jumper
disables the front panel LOCAL button and the front panel voltage and current limit potentiometers. You cannot
return to local mode using software commands without closing jumper J104. Table 2.7-3 gives a quick reference
to how the jumper affects the operating state of the power supply. Figure 2.7-1 shows the position of jumper J104
on the M9B-HFS PCB.
Table 2.7-3Local Mode Disable Jumper J104 Selection
Jumper J104 Position Operating State
Closed Remote or Local Control of Power Supply
Open Software Control Only
Note: The location of over voltage protection control is dependent on the positions of jumper J104 and OVP
control jumper J66. Table 2.7-1 shows how the jumper positions affect the location of OVP control.

INSPECTION AND CONFIGURATION M9B-HFS INTERFACE
2-10 Release 1.0 (97/10)
J7-1 External TTL shutdown input signal
J7-2 Polarity signal, open collector
(asserted by VSET -x)
J7-3 Isolation signal, open collector
(asserted by OUT OFF)
J7-4 Fault signal, open collector
(asserted when bit set in fault register)
J7-5 External Vcc, 18V maximum
(supplied by connecting and operating an external
source)
J7-6 External ground and shutdown return
(supplied by connecting and operating an external
source)
J7-7 Open collector user signal
(asserted by AUXA ON)
J7-8 Open collector user signal
(asserted by AUXB ON)
2.8 J7 User Signal Connector
Auxiliary connector J7, located on the HFS-M9B Interface rear panel, provides several signals to increase your
operating control of the supply. These signals are dependent on the operator's design and uses. The operation
of the J7 signal requires that you provide external Vcc and ground connection. Use a standard 8-position
telephone jack and data cable to connect to J7. To locate the connector, refer to the M9B-HFS interface rear
panel drawing in Figure 2.2-2. Pin 1 is located in the top right position of connector J7 when you face the rear
panel. See also Section 3.2 Command Summary for more information about the device dependent commands.
Figure 2.8-1J7 Connector and Pin Settings
(2800 Watt Model Orientation)
2.8.1 J7 Cable Connection
Use a standard 8-position telephone jack and data cable to connect to J7. Add a ferrite block to reduce radiated
emission. The one inch square ferrite block with built-in housing clip is packaged and shipped with the power
supply interface card.
To install the ferrite block:
1. Position the block no more than 5 cm (2") from the power supply end of the J7 user cable.
2. Open the ferrite block housing.
3. Loop the cable through the ferrite block. See Figure 2.8-2.
4. Close the housing clip.
The ferrite block ensures that the power supply system meets radiated emission requirement 89/336/EEC for CE
mark approval. See the power supply's operating manual for noise specifications.
Figure 2.8-2J7 User Cable with Ferrite Block
5 cm
Max.
To J7 Connector
Pin 1
Pin 8
To User Custom
Interface
J7 User Cable
Ferrite Block
FE-0443-CL