Ametek XTR 40-21, XTR 8-100, XTR 60-14, XTR 80-10.5, XTR 100-8.5 Operating Manual

XTR 850 Watt Series

Programmable DC

Power Supply

Operating Manual

(firmware v 1.11 and higher)

Models:
XTR 6-110 XTR 8-100 XTR 12-70
XTR 20-42 XTR 33-25 XTR 40-21
XTR 60-14 XTR 80-10.5 XTR 100-8.5

XTR 150-5.6 XTR 300-2.8 XTR 600-1.4

M370185-01 Rev B www.programmablepower.com

About AMETEK

AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design
and manufacture of precision, programmable power supplies for R&D, test and measurement,
process control, power bus simulation and power conditioning applications across diverse
industrial segments. From bench top supplies to rack-mounted industrial power subsystems,
AMETEK Programmable Power is the proud manufacturer of Elgar, Sorensen, California
Instruments and Power Ten brand power supplies.

AMETEK, Inc. is a leading global manufacturer of electronic instruments and electromec hanical
devices with annualized sales of $2.5 billion. The Company has over 11,000 colleagues working
at more than 80 manufacturing facilities and more than 80 sales and service centers in the United
States and around the world.

Trademarks

AMETEK is a registered trademark of AMETEK, Inc. Sorensen is a trademark owned by AMETEK,
Inc. Other trademarks, registered trademarks, and product names are the property of their
respective owners and are used herein for identification purposes only.

Notice of Copyright

XTR 850 Watt Series Programmable DC Power Supply Operating Manual (firmware v 1.11 and
higher)

© 2007-2009 AMETEK Programmable Power, Inc. All rights reserved.

Exclusion for Documentation

UNLESS SPECIFICALLY AGREED TO IN WRITING, AMETEK PROGRAMMABLE POWER, INC.
(“AMETEK”):

(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY

TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER
DOCUMENTATION.

(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR

EXPENSES, WHETHER SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL,
WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH
INFORMATION WILL BE ENTIRELY AT THE USER’S RISK, AND

(c) REMINDS YOU THAT IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN ENGLISH,

ALTHOUGH STEPS HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF THE
TRANSLATION, THE ACCURACY CANNOT BE GUARANTEED. APPROVED AMETEK CONTENT
IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION, WHICH IS POSTED AT
WWW.PROGRAMMABLEPOWER.COM.

Date and Revision

January 2009 Revision B

Part Number

M370185-01

Contact Information

Telephone: [phone] (toll free in North America)
858 450 0085 (direct)
Fax: [phone]
Email: [e-mail]
[e-mail]
Web: www.programmablepower.com

i

Product Family: XTR 850 Watt Series Programmable DC Power Supply

Warranty Period: Five Years

WARRANTY TERMS

AMETEK Programmable Power, Inc. (“AMETEK”), provides this written warranty covering the
Product stated above, and if the Buyer discovers and notifies AMETEK in writing of any defect in
material or workmanship within the applicable warranty period stated above, then AMETEK may,
at its option: repair or replace the Product; or issue a credit note for the defective Product; or
provide the Buyer with replacement parts for the Product.

The Buyer will, at its expense, return the defective Product or parts thereof to AMETEK in
accordance with the return procedure specified below. AMETEK will, at its expense, deliver the
repaired or replaced Product or parts to the Buyer. Any warranty of AMETEK will not apply if the
Buyer is in default under the Purchase Order Agreement or where the Product or any part
thereof:

• is damaged by misuse, accident, negligence or failure to maintain the same as

specified or required by AMETEK;

• is damaged by modifications, alterations or attachments thereto which are not

authorized by AMETEK;

• is installed or operated contrary to the instructions of AMETEK;

• is opened, modified or disassembled in any way without AMETEK’s consent; or

• is used in combination with items, articles or materials not authorized by AMETEK.

The Buyer may not assert any claim that the Products are not in conformity with any warranty
until the Buyer has made all payments to AMETEK provided for in the Purchase Order Agreement.

PRODUCT RETURN PROCEDURE

1. Request a Return Material Authorization (RMA) number from the repair facility (must be
done in the country in which it was purchased):

• In the USA, contact the AMETEK Repair Department prior to the return of the

product to AMETEK for repair:
Telephone: [phone], ext. 2295 or ext. 2463 (toll free North America)

858-450-0085, ext. 2295 or ext. 2463 (direct)

• Outside the United States, contact the nearest Authorized Service Center

(ASC). A full listing can be found either through your local distributor or our
website, www.programmablepower.com, by clicking Support and going to the
Service Centers tab.

2. When requesting an RMA, have the following information ready:

• Model number

• Serial number

• Description of the problem

NOTE: Unauthorized returns will not be accepted and will be returned at the shipper’s expense.
NOTE: A returned product found upon inspection by AMETEK, to be in specification is subject to

an evaluation fee and applicable freight charges.

ii

About This Manual

Purpose

The Operating Manual provides installation and operating information for
the XTR 850 Watt Series Programmable DC Power Supply.

Scope

The Manual provides safety information, features and specifications,
installation procedures, functional test procedures, and operating procedures
for both local (front panel) operation and remote operation.

The Manual does not provide information on the GPIB and Ethernet
(ENET) interface options. See the XTR 850 Watt GPIB and Ethernet
Interface Option Operating Manual (Part number M370046-06).

Audience

The Manual is intended for the user who is familiar with electronic power
supplies, Constant Voltage and Constant Current operating modes, and the
control of output power. The user should be familiar with practicing safe
techniques while making supply or pin connections.

(firmware v1.11 and higher)

Conventions Used

The following conventions are used in this guide.

WARNING

Warnings identify conditions or practices that could result in personal injury or
loss of life.

CAUTION

Cautions identify conditions or practices that could result in damage to the unit or
other equipment.

Important:

know. They are not as serious as Warnings or Cautions.

M370185-01 iii

Important notes provide information that is important for you to

About This Manual (firmware v1.11 and higher)

Related Information

For related information on this product, see also:

• XTR 850 Watt GPIB and Ethernet Interface Option Operating
Manual (Part number M370046-06) provides information on the
GPIB and Ethernet interface option.

• XTR 850 Watt Series Programmable DC Power Supply: Quick
Reference Guide (Part number M370185-04) is included with your
power supply and provides an introduction to using the front panel
interface.

• Rack Mount Kit Options Installation Instructions (Part number
M370046-05) provides information on rack mounting a single or
dual XTR 850 Watt.

More information about AMETEK Programmable as well as its products
and services, is available at

Acronyms

Acronym Definition

APG Analog Programming

www.programmablepower.com.

AUX Auxiliary

ENET Ethernet

FGA Finished Goods Assembly

ISOL Isolated Analog Programming

OTP Over Temperature Protection

OVP Over Voltage Protection

PSU Power Supply Unit

TVS Transient Voltage Suppressor

UVP Under Voltage Protection

Font Conventions

This Manual uses the following typographical conventions:

7 segment

Command body text

iv M370185-01

For display and readback information on the
output voltage and current displays.

Represents SCPI commands.

Important Safety Instructions

WARNING: High energy and high voltage

Exercise caution when using a power supply. High energy levels can be stored at
the output voltage terminals on a power supply in normal operation. In addition,
potentially lethal voltages exist in the power circuit and on the output and sense
connectors of a power supply with a rated output greater than 40
capacitors store potentially dangerous energy for some time after power is
removed.

WARNING: Fire hazard

Operate the power supply in an environment free of flammable gases or fumes.
To ensure that the power supply's safety features are not compromised, use the
power supply as specified in this Manual and do not substitute parts or make any
unauthorized modifications. If service is necessary, please return the power
supply to the Authorized Service Center. See
Policy” on page WA –3 .

WARNING: Limitations on use

The XTR 850 Watt Series Programmable DC Power Supply is not intended for
use in connection with life support systems or other medical equipment or
devices.

“Return Material Authorization

V. F i lte r

CAUTION: For use as a battery charger

When you are using a power supply for battery charging applications, it is
essential to provide an appropriately sized fuse or circuit breaker in series
between the power supply output and the battery.
Installation of a protector (fuse or DC circuit breaker), rated for about 115% of
the maximum current rating of the power supply and designed specifically to
interrupt the DC voltage of the battery, will provide adequate current protection.
Where several power supplies are in parallel, it is best to fuse each power supply
rather than use one fuse at the battery.

Power Supply Safety Markings

Alternating Current On (Supply)

Earth (Ground) Terminal Off (Supply)

Protective Conductor
Term inal

M370185-01 v

Caution (Check the Manual
for additional information.)

Safety

Standard Warnings

WARNING: Keep these instructions

This chapter contains important safety and operating instructions. Read and keep
this Operating Manual for future reference.

1. Before installing and using the XTR 850 Watt Series Programmable
DC Power Supply, read all instructions and cautionary markings on
the XTR and all appropriate sections of this Manual.

2. The XTR is for indoor use only. Do not expose the XTR to moisture.
To reduce risk of fire hazard, do not cover or obstruct the ventilation
openings. Be sure to install the XTR in a compartment which allows
air to reach the ventilation inlets on the front and rear of the unit to
prevent overheating. For more information, see
page 2–4.

3. To avoid a risk of fire and electric shock, make sure that the existing
wiring is in good condition and the wire is not undersized. Do not
operate the XTR with damaged or substandard wiring.

“Ventilation” on

4. Do not operate the XTR if it has received a sharp blow, been dropped,
or otherwise damaged in any way. If the XTR is damaged, see
“Warranty and Product Information” on page WA – 1.

5. Do not disassemble the XTR. It contains no user-serviceable parts.
See the
instructions on obtaining service. Attempting to service the XTR
yourself may result in a risk of electrical shock or fire. Internal
capacitors remain charged after all power is disconnected.

6. To reduce the risk of electrical shock, disconnect AC power from the
XTR before attempting any maintenance or cleaning or working on
any circuits connected to the XTR. Turning off controls will not
reduce this risk.

“Warranty and Product Information” on page WA – 1 for

vi M370185-01

Contents

1

Introduction

Features and Options - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1–2
XTR 850 Watt Models (firmware version 1.11 and higher)- - - - - - - - - - - - - - - - - -1–3
Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4

Front Panel Display and Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1–5

Rear Panel Connectors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1–6

2

Installation

Basic Setup Procedure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–2
Step 1: Inspecting and Cleaning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–3

Initial Inspection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–3
Periodic Cleaning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3

Step 2: Location and Mounting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–4

Rack Mounting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–4
Purchasing Rack Mount Kits - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4
Ventilation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4

Step 3: Connecting AC Input Power - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–5

AC Input Connector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5

Step 4: Selecting Load Wires - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–6

Load Wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–6

Step 5: Performing Functional Tests - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–8

Powering the Power Supply On/Off - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2–8
Voltage and Current Mode Operation Checks - - - - - - - - - - - - - - - - - - - - - - - -2–9

Step 6: Connecting Loads - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–10

DC Output Connectors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–10
Inductive Loads and Batteries - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–11
Connecting Single Loads - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–12
Connecting Multiple Loads - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–12

M370185-01 vii

Step 7: Connecting Remote Sensing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–13

3

Local Operation

Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–2
Configuring Settings from the Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–2

Using the 9-Position Mode Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–2
Using the Rotary Adjust/Enter Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–2
Coarse and Fine Adjustment Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–3

Navigating the Menu System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–5

Setting VOLTS and AMPS Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5

Normal Display Mode and Inactivity Timeout - - - - - - - - - - - - - - - - - - - - - - - - 3–7
Display Messages on the Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–9
Standard Operation- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–12

Operating Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–12

Shipped Configuration (Local Operation) - - - - - - - - - - - - - - - - - - - - - - - - - - 3–16
Enabling the Output - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–16
Enabling the Auxiliary Output - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–17
Output Auto Start Mode (Auto Restart) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–17
Auxiliary Auto Start Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–18
Alarms and Errors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–19

Clearing Alarms - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–20

Front Panel ALARM LED - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–21

Alarm Masking - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–22

Alarm Output Latching - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–23
Setting Foldback Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–24

Resetting Activated Foldback Protection - - - - - - - - - - - - - - - - - - - - - - - - - - 3–25
Using Over Voltage Protection (OVP)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–26

Defining the OVP Set Point - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–27
Using Under Voltage Protection (UVP) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–28

Defining the UVP Set Point - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–29
Over Current Protection (OCP) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–29
Using Over Temperature Protection Lock (OTP) - - - - - - - - - - - - - - - - - - - - - - - 3–30

Defining the OTP Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–30

Resetting in Latch Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–30
Using the External Shutdown Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–31

Activating the External Shutdown Function - - - - - - - - - - - - - - - - - - - - - - - - 3–31

Controlling the External Shutdown Function - - - - - - - - - - - - - - - - - - - - - - - - 3–31

Contents

viii M370185-01

Contents

Defining the Polarity of the External Shutdown Signal - - - - - - - - - - - - - - - - - 3–32
Interlock Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–33

Defining the Interlock Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–33

Power On Status Signal - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–34
Hardware Malfunction Alarms - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–34
Current Configuration Memory Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–35
User Setting Memory Locations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–36

Saving User Setting Memory Locations - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–36

Recalling User Setting Memory Locations - - - - - - - - - - - - - - - - - - - - - - - - - 3–37
Local Lockout - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–38

Enabling Local Lockout - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–38

Disabling Local Lockout - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–38
Resetting the Power Supply - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–40
Using Multiple Power Supplies - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–42

Configuring Multiple Supplies for Series Operation - - - - - - - - - - - - - - - - - - - 3–44

Configuring Multiple Supplies for Current Sharing Operation (APG Method) - 3–46

Connecting to the Load in Local Sensing Mode (Parallel Control Method) - - - 3–49

Connecting to the Load in Remote Sensing Mode (Parallel Control Method) - - 3–50

4

Analog Programming (APG) and Isolated Analog Programming (ISOL)

Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4–2

Analog Programming (APG) of Output Voltage and Output Current - - - - - - - - -4–2

Remote Programming Options - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4–3

Analog Programming (APG) Connector J1 - - - - - - - - - - - - - - - - - - - - - - - - - -4–5
Analog Programming Mode- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4–9

Analog Programming With External Voltage Source - - - - - - - - - - - - - - - - - - -4–9

Voltage-Controlled Voltage APG Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–10

Voltage-Controlled Current APG Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–12

Resistive-Controlled Voltage APG Setup - - - - - - - - - - - - - - - - - - - - - - - - - - 4–15

Resistive-Controlled Current APG Setup - - - - - - - - - - - - - - - - - - - - - - - - - - 4–17

Voltage and Current Readback - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–19
Isolated Analog Programming Mode (ISOL) - - - - - - - - - - - - - - - - - - - - - - - - - - 4–20

AUX Output and Isolated Analog Programming (ISOL) Connector - - - - - - - - 4–20

Voltage-Controlled Voltage ISOL Setup - - - - - - - - - - - - - - - - - - - - - - - - - - 4–24

Voltage-Controlled Current ISOL Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–26

Resistive-Controlled Voltage ISOL Setup - - - - - - - - - - - - - - - - - - - - - - - - - - 4–29

Resistive-Controlled Current ISOL Setup - - - - - - - - - - - - - - - - - - - - - - - - - - 4–31

ix M370185-01

Voltage and Current Readback (Isolated)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–33

5

Remote Operation

Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -5–2
Hardware and Connection Setup- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -5–3

Configuring Remote Control Using RS-232 - - - - - - - - - - - - - - - - - - - - - - - - - 5–3

Configuring Remote Control Using RS-485 - - - - - - - - - - - - - - - - - - - - - - - - - 5–7

Configuring Remote Control using the USB Connector - - - - - - - - - - - - - - - - -5–9

Setting Up the PC to Use the USB Connection - - - - - - - - - - - - - - - - - - - - - - - 5–9

Ethernet (ENET) or GPIB Connector (Optional) - - - - - - - - - - - - - - - - - - - - - 5–15

Multiple Power Supply Connections to RS-485 Bus - - - - - - - - - - - - - - - - - - - 5–15
Terminal Configuration- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–17

Data Format - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–17

End of Message - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–17

HyperTerminal - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–17

Selecting the Appropriate Communication Port - - - - - - - - - - - - - - - - - - - - - - 5–20

Multichannel Address Setting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–21

Remote Interface Addressing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–22

Multichannel Commands Explained - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–23

Status Reporting in SCPI - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–25
Status Registers Model from IEEE 488.2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–27
Status Byte - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–28

Error/Event Queue (ERR) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–28

Questionable Status Register Summary (QSR) - - - - - - - - - - - - - - - - - - - - - - 5–28

Message Available (MAV) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–29

Standard Event Status Summary (ESB) - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–29

Master Summary Status (MSS) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–29

Request Service (RQS) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–29

Operation Status Register Summary (OSR) - - - - - - - - - - - - - - - - - - - - - - - - - 5–30

Standard Event Status Register (SESR) - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–31
Standard SCPI Register Structure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–34
OPERation Status Register - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–35

Current SHare Sub-Register - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–38

Operation Status Register Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–39

Current Sharing Sub-Register Commands - - - - - - - - - - - - - - - - - - - - - - - - - - 5–40

Contents

x M370185-01

Contents

Shutdown Sub-Register Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–41

Protection Sub-Register Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–42
QUEStionable Status Register - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–43

VOLTage Sub-Register - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–46

TEMPerature Sub-Register - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–46

Questionable Status Register Commands - - - - - - - - - - - - - - - - - - - - - - - - - - 5–47

Voltage Status Register Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–48

Temperature Status Register Commands - - - - - - - - - - - - - - - - - - - - - - - - - - 5–49
SCPI Error/Event Queue - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–50

Reset Command - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–52

Clear All Status Registers - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–53

SCPI Preset Status - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–54

Command Line Help System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–55
Locking and Unlocking the Front Panel- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–58

Auto Sequence Programming - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–58
Configure Other Protection Mechanisms - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–65

Foldback Protection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–65

Over Temperature Protection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–66

Interlock Enable/Disable - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–66

Save and Recall - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–67

Set Analog Programming Level - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–67

Set Remote Programming Interface - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–67

Protection Mask (Enable Alarms) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–69

6

Calibration and Troubleshooting

Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6–2
Main Voltage and Current Calibration Principle - - - - - - - - - - - - - - - - - - - - - - - - -6–3

Understanding the Problem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–3

Step 1: Gain Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6–4

Step 2: Offset Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6–4

Step 3: Recalibrate Gain - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6–5
Calibrating the Output Voltage- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6–6

Gain Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6–6

Offset Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–6
Calibrating the Output Current - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–7

Gain Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6–7

Offset Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–8

xi M370185-01

Contents

Over Voltage Protection Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6–9
Non-isolated Analog Programming Calibration- - - - - - - - - - - - - - - - - - - - - - - - - 6–10

Non-isolated Voltage Monitoring Calibration - - - - - - - - - - - - - - - - - - - - - - - 6–10

Non-isolated Current Monitoring Calibration - - - - - - - - - - - - - - - - - - - - - - - 6–11

Non-isolated Voltage Programming of Voltage Calibration - - - - - - - - - - - - - - 6–12

Non-isolated Resistive Programming of Voltage Calibration - - - - - - - - - - - - - 6–13

Non-isolated Voltage Programming of Current Calibration - - - - - - - - - - - - - - 6–14

Non-isolated Resistive Programming of Current Calibration - - - - - - - - - - - - - 6–15
Calibration Procedure for Isolated Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–16

Isolated Voltage Monitoring Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–16

Isolated Current Monitoring Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–17

Isolated Voltage Programming of Voltage Calibration - - - - - - - - - - - - - - - - - 6–18

Isolated Resistive Programming of Voltage Calibration - - - - - - - - - - - - - - - - 6–19

Isolated Voltage Programming of Current Calibration - - - - - - - - - - - - - - - - - 6–20

Isolated Resistive Programming of Current Calibration - - - - - - - - - - - - - - - - - 6–21

Calibrating the Input Voltage APG Signal - - - - - - - - - - - - - - - - - - - - - - - - - 6–22

Calibrating the Input Current APG Signal - - - - - - - - - - - - - - - - - - - - - - - - - - 6–23
Storing and Loading Calibration Parameters- - - - - - - - - - - - - - - - - - - - - - - - - - - 6–25
Restore Factory Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–26
Restore Default Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–26
User Diagnostics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–26

Emergency Shutdown - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–27

Unusual or Erratic Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–27

Troubleshooting for Operators - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–28

A

SCPI Command Reference

SCPI Conformance Information - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–2

IEEE 488.2/SCPI Syntax and Style - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–2

SCPI Command Hierarchy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–3

Using SCPI Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–4

Parameter Types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–7
SCPI Command Tree - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–8

SCPI Command Summary - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–14

B

Error Messages

Error Messages - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–2

Command Error List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–3

Execution Error List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–4

xii M370185-01

Device-Specific Error List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–5

Query Error List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–6

C

Specifications

Electrical Specifications for XTR 850 Watt - - - - - - - - - - - - - - - - - - - - - - - - - - - C–2

AC Line Input Specifications for XTR 850 Watt - - - - - - - - - - - - - - - - - - - - - C–3
Remote Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - C–4
Common Specifications for All Models - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - C–5

Contents

xiii M370185-01

xiv

Figures

Figure 1-1 XTR 850 Watt Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4
Figure 1-2 Front Panel Display and Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5
Figure 1-3 Rear Panel: 6 V to 40 V Models- - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
Figure 1-4 Rear Panel: 60 V to 150 V Models - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
Figure 1-5 Rear Panel: 300 V to 600 V Models - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
Figure 2-1 Maximum Load Wire Length for 1 V Line Drop- - - - - - - - - - - - - - - - - - 2–7
Figure 2-2 Diode Placement - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–11
Figure 2-3 Connecting Single Loads - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–12
Figure 2-4 Remote Sense Connection- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–13
Figure 3-1 9-Position Mode Control- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2
Figure 3-2 Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–7
Figure 3-3 Front Panel Menu System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–8
Figure 3-4 Operating Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–14
Figure 3-5 Split Supply Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–43
Figure 3-6 Series Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–44
Figure 3-7 Load Connections in Remote Sensing Mode - - - - - - - - - - - - - - - - - - - 3–45
Figure 3-8 Load Connections in Local Sensing Mode - - - - - - - - - - - - - - - - - - - - - 3–49
Figure 3-9 Load Connections in Remote Sensing Mode (Parallel Control Method) - 3–50
Figure 4-1 APG Connector Terminals - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–5
Figure 4-2 Inserting Screwdriver into Spring Terminal Block - - - - - - - - - - - - - - - - 4–7
Figure 4-3 APG and DC Output Connector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–7
Figure 4-4 Programming Output Voltage using an External Voltage Source- - - - - - - 4–9
Figure 4-5 Programming Output Current using an External Voltage Source - - - - - - - 4–9
Figure 4-6 Programming Output Voltage using an External Resistor- - - - - - - - - - - 4–14
Figure 4-7 Programming Output Current using an External Resistor - - - - - - - - - - - 4–14
Figure 4-8 Voltage Readback Using APG Connector J1 - - - - - - - - - - - - - - - - - - - 4–19
Figure 4-9 Current Readback Using APG Connector J1 - - - - - - - - - - - - - - - - - - - 4–19
Figure 4-10 AUX Output and ISOL Connector Pinout - - - - - - - - - - - - - - - - - - - - - 4–20
Figure 4-11 Programming Output Voltage using an Isolated External Voltage Source 4–23
Figure 4-12 Programming Output Current using an Isolated External Voltage Source 4–23
Figure 4-13 Programming Output Voltage using an Isolated External Resistor - - - - - 4–28
Figure 4-14 Programming Output Current using an Isolated External Resistor - - - - - 4–28

M370185-01 xv

Figures

Figure 4-15 Isolated Voltage Monitoring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–33
Figure 4-16 Isolated Current Monitoring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–33
Figure 5-1 Remote Control Connectors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–3
Figure 5-2 RS-232 Communication Cable with DB-9 Pinout - - - - - - - - - - - - - - - - - 5–5
Figure 5-3 DB-25 Pinout - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–5
Figure 5-4 RS-232 Communication Cable with DB-25 Pinout - - - - - - - - - - - - - - - - 5–6
Figure 5-5 RS-485 Communication Cable with DB-9 - - - - - - - - - - - - - - - - - - - - - - 5–7
Figure 5-6 RS-485 Communication Cable from Master to Slave Unit - - - - - - - - - - - 5–8
Figure 5-7 Found New Hardware Wizard - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–10
Figure 5-8 Install Hardware Device Drivers - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–10
Figure 5-9 Completing the New Hardware Wizard - - - - - - - - - - - - - - - - - - - - - - - 5–11
Figure 5-10 Device Manager - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–12
Figure 5-11 Communications Port (COM1) Properties - - - - - - - - - - - - - - - - - - - - - 5–13
Figure 5-12 Completing the new hardware wizard - - - - - - - - - - - - - - - - - - - - - - - - 5–13
Figure 5-13 Multi Power Supply Connection to RS-485 Bus - - - - - - - - - - - - - - - - - 5–15
Figure 5-14 USB Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–18
Figure 5-15 ASCII Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–19
Figure 5-16 SCPI Status Reporting Model - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–26
Figure 5-17 IEEE 488.2 Register Model- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–27
Figure 5-18 Summary of Standard Event Status Register - - - - - - - - - - - - - - - - - - - 5–32
Figure 5-19 SCPI Register Model - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–34
Figure 5-20 Operation Status Register Fanout - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–35
Figure 5-21 SCPI QUEStionable Registers Fanout- - - - - - - - - - - - - - - - - - - - - - - - 5–44
Figure 6-1 Offset (Intercept) Error and Gain (Slope) Error- - - - - - - - - - - - - - - - - - - 6–3
Figure 6-2 Calibration: Step 1 Gain Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - 6–4
Figure 6-3 Calibration: Step 2 Offset Calibration - - - - - - - - - - - - - - - - - - - - - - - - - 6–4
Figure 6-4 Calibration: Step 3 Recalibrate Gain - - - - - - - - - - - - - - - - - - - - - - - - - - 6–5
Figure C-1 XTR 850 Watt Mechanical Dimensions: 6 to 40 V Models - - - - - - - - - - C–7
Figure C-2 XTR 850 Watt Mechanical Dimensions: 60 V to 600 V Models - - - - - - - C–8

M370185-01 xvi

Tables

Table 1-1 XTR 850 Watt Series Voltage and Current Ranges - - - - - - - - - - - - - - - - 1–3
Table 2-1 Basic Setup Procedure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2
Table 2-2 Current Carrying Capacity for Load Wiring- - - - - - - - - - - - - - - - - - - - - 2–6
Table 3-1 Select and Set from the Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3
Table 3-2 Front Panel Display Text - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–9
Table 3-3 Shipped Configuration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–16
Table 3-4 Alarm Order of Precedence - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–19
Table 3-5 Alarm Mask Bit Positions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–22
Table 3-6 Alarm Latch Bit Positions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–23
Table 3-7 Power Cycle Saved/Recalled Settings - - - - - - - - - - - - - - - - - - - - - - - - 3–35
Table 3-8 User Accessible Saved/Recalled Settings- - - - - - - - - - - - - - - - - - - - - - 3–36
Table 3-9 Power Supply Default Settings- - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–40
Table 4-1 Monitor Lines - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–3
Table 4-2 Remote Programming Options- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–4
Table 4-3 APG Pins and Functions J1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–5
Table 4-4 AUX Output and ISOL Connector Pins and Functions J3- - - - - - - - - - - 4–21
Table 5-1 Remote Control Connector Pins and Functions J4 and J6 - - - - - - - - - - - - 5–3
Table 5-2 DB-9 Pinouts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–4
Table 5-3 RJ-45 Pinouts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–4
Table 5-4 DB-25 Pinouts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–5
Table 5-5 DB-9 Pinouts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–7
Table 5-6 RJ-45 Plug Pinouts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–7
Table 5-7 RJ-45 Plug on Slave Unit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–8
Table 5-8 Rules for Multichannel Responses - - - - - - - - - - - - - - - - - - - - - - - - - - 5–23
Table 5-9 Status Byte Summary Register- - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–28
Table 5-10 Standard Event Status Register - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–32
Table 5-11 OPERation Status Register - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–36
Table 5-12 OPERation SHUTdown Status Register - - - - - - - - - - - - - - - - - - - - - - 5–37
Table 5-13 OPERation SHUTdown PROTection Status Register - - - - - - - - - - - - - 5–37
Table 5-14 OPERation CSHare Status Register - - - - - - - - - - - - - - - - - - - - - - - - - 5–38
Table 5-15 QUEStionable Status Register - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–45
Table 5-16 QUEStionable VOLTage Status Register- - - - - - - - - - - - - - - - - - - - - - 5–46

M370185-01 xvii

Tabl es

Table 5-17 QUEStionable TEMPerature Status Register - - - - - - - - - - - - - - - - - - - - 5–46
Table 5-18 Preset Values of User Configurable Registers - - - - - - - - - - - - - - - - - - - 5–54
Table 5-19 Alarms Bit Mask- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–69
Table 6-1 Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–28
Table A-1 IEEE 488.2 Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–14
Table A-2 Readback Commands- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–16
Table A-3 SCPI Commands for Output Control - - - - - - - - - - - - - - - - - - - - - - - - A–17
Table A-4 SCPI Commands for Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - A–18
Table A-5 SCPI Commands to Clear All Protection Mechanisms- - - - - - - - - - - - - A–21
Table A-6 SCPI Commands for Foldback Protection - - - - - - - - - - - - - - - - - - - - - A–21
Table A-7 SCPI Commands for Power - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–22
Table A-8 SCPI Commands for Triggering - - - - - - - - - - - - - - - - - - - - - - - - - - - A–22
Table A-9 System Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–23
Table A-10 Status Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–26
Table A-12 Auto Sequence Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–33
Table A-11 Protection Commands - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–33
Table B-1 Command Error List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–3
Table B-2 Execution Error List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–4
Table B-3 Device-Specific Error List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–5
Table B-4 Query Error List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - B–6
Table C-1 XTR 850 Watt Electrical Specifications for 6 V to 600 V Models - - - - - - C–2
Table C-2 Remote Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - C–4

xviii M370185-01

1

Introduction

Chapter 1, Introduction, describes the features of the XTR
850 Watt Series Programmable DC Power Supply.

Introduction

Features and Options

The XTR 850 Watt Series Programmable DC Power Supply provides
stable, variable output voltage and current for a broad range of
development and system requirements. The power supplies have a high
power density and numerous industry standard interfaces:

• RS-232, RS-485, analog programming (APG), isolated analog
programming (ISOL), and USB built-in ports.

• Optional GPIB or Ethernet (ENET) control for remote operation and
readback.

• Seamless switching between front panel and any digital interface
(RS-232, RS-485, USB, GPIB or ENET).

• Simultaneous digital displays for both voltage and current.

• Front panel control by rotary Adjust/Enter knob, permitting high
resolution output setting.

• Active Power Factor Correction (PFC) reduces input current and
input current harmonics.

• Automatic crossover system allowing the power supply to switch
between Constant Current and Constant Voltage operating modes.

• Parallel or series connection among multiple units to produce greater
diversity or to use in higher power applications.

• Short-circuit protection of DC outputs provideing greater operating
safety.

• Built-in APG and ISOL interface to provide a galvanically isolated
analog voltage control of the output, master/slave output tracking,
and remote Enable/disable for safety and precision.

• Remote output voltage sensing to automatically compensate for cable
losses.

• Software calibrated.

• Three user setting memory locations.

• M10 Option preprograms the voltage to reset to zero upon power on
and upon output enable.

1-2 M370185-01

XTR 850 Watt Models (firmware version 1.11 and higher)

XTR 850 Watt Models (firmware version 1.11 and higher)

Table 1-1 lists the models in the XTR 850 Watt series covered by this
Manual.

1

Table 1-1

Model Output Voltage Output Current

6-110 0–6 V 0–110 A

8-100 0–8 V 0–100 A

12-70 0–12 V 0–70 A

20-42 0–20 V 0–42 A

33-25 0–33 V 0–25 A

40-21 0–40 V 0–21 A

60-14 0–60 V 0–14 A

80-10.5 0–80 V 0–10.5 A

100-8.5 0–100 V 0–8.5 A

150-5.6 0–150 V 0–5.6 A

300-2.8 0–300 V 0–2.8 A

600-1.4 0–600 V 0–1.4 A

XTR 850 Watt Series Voltage and Current Ranges

M370185-01 1-3

Introduction

Front Panel

Figure 1-1

Item Description

1 Front panel power switch

2 Front panel display. See Figure 1-2 for details.

3 Air Intake Vents

XTR 850 Watt Front Panel

1-4 M370185-01

Front Panel Display and Controls

Front Panel

1

Figure 1-2

Item Description

1 Rotary Adjust/Enter control

2 Constant Voltage (CV) Mode LED (green)

3 Model Identification Label

4 Output Voltage Display

5 Constant Current (CC) Mode LED (green)

6 Output Current Display

7 Alarm Indicator LED (red)

8 OUTPUT ENABLE Main button

9 OUTPUT ENABLE Aux button

10 9-Position Mode Control (For detailed information, see “Configuring Settings from the

Front Panel Display and Controls

Front Panel” on page 3–2).

M370185-01 1-5

Introduction

Rear Panel Connectors

1

6

Figure 1-3

1

Rear Panel: 6 V to 40 V Models

SN

2

J2

J3

J1

7

2

J2

J3

J1

6 111087 9

3

J5

8

9

3

J5

4

J4

J6

10

11

4

J4

J6

100 - 240 Vac
47-63 Hz, 11.5 –6A
MADE IN CANADA

100 - 240 Vac
47-63 Hz, 11.5 –6A
MADE IN CANADA

5

5

Figure 1-4

6 11

Figure 1-5

Rear Panel: 60 V to 150 V Models

1 2

SN

J2

J3

J1

3

Rear Panel: 300 V to 600 V Models

4

J4

J5

J6

100 - 240 Vac
47-63 Hz, 11.5 –6A
MADE IN CANADA

5

10987

1-6 M370185-01

Item Description

Rear Panel Connectors

1 6 V– 40 V Models: DC Output Terminal Positive

60 V–150 V Models: DC Output Connectors Positive (6.5 mm hole diameter)
300 V–600 V Models: DC Output Connectors Positive (6.5 mm hole diameter)

2 6 V– 40 V Models: DC Output Terminal Negative

60 V–150 V Models: DC Output Connectors Negative (6.5 mm hole diameter)
300 V–600 V Models: DC Output Connectors Negative (6.5 mm hole diameter)

3 (J2) Ethernet (ENET) or GPIB Connector (optional)

4 (J4) RS-232/RS-485 Connector In Port

5 AC Input Connector (IEC Type)

6 Chassis Ground Stud

7 (J1) Analog Programming (APG) Connector. For pin information, see page 4–5.

8 (J3) AUX Output and Isolated Analog Programming (ISOL) Connector. For pin information, see

page 4–20.

9 (J5) USB Connector

10 (J6) RS-485 Connector Multichannel Port

11 Fan Exhaust Vents

1

M370185-01 1-7

1-8

2

Installation

Chapter 2, Installation, provides information and
procedures for inspecting, installing, and testing the power
supply.

Installation

Basic Setup Procedure

Table 2-1 provides a summary of the basic setup procedure with
references to the relevant sections in this chapter. Refer to this table if you
are unfamiliar with the installation requirements for the power supply.
Complete each step in the sequence given.

Table 2-1

Step Description Action Reference

1 Inspect Inspect the power supply. “Step 1: Inspecting and Cleaning”

2 Install Install the power supply

3 Connect Input

4 Select Wires Select wires that are correctly

5 Test Perform functional tests for

6 Connect Loads Connect the load wires to the

7 Connect Remote

Basic Setup Procedure

Power

Sensing (if
required)

on page 2–3.

“Step 2: Location and Mounting” on
(benchtop or rack mount).
Ensure adequate ventilation.

Connect AC input power. “Step 3: Connecting AC Input

rated for the maximum DC
output current.

voltage mode operation, current
mode operation, and front panel
controls.

DC output.
Connect remote sensing

connectors on power supply to
load.

page 2–4.

Power” on page 2–5.

“Step 4: Selecting Load Wires” on

page 2–6.

“Step 5: Performing Functional

Tests” on page 2–8.

“Step 6: Connecting Loads” on

page 2–10.

“Step 7: Connecting Remote

Sensing” on page 2–13.

2-2 M370185-01

Step 1: Inspecting and Cleaning

Initial Inspection

When you first receive your unit, perform a physical check:

1. Inspect the unit for any scratches and cracks, broken switches,
connectors or displays.

2. Ensure that the packing box contains the 7.5 foot (2.5 m) power cord.

3. If you see external damage or suspect internal damage, contact the
carrier immediately.

Periodic Cleaning

The power supply only requires periodic cleaning, not routine servicing.
Whenever a unit is removed from operation, clean the metal surfaces with
naptha or an equivalent solvent, and clean the front panel with a weak
solution of soap and water. Use low-pressure compressed air to blow dust
from components on the printed circuit boards.

Step 1: Inspecting and Cleaning

2

M370185-01 2-3

Installation

Step 2: Location and Mounting

The power supply may be rack-mounted or used in benchtop applications.

Rack Mounting

The XTR 850 Watt power supply is designed to fill half of a standard

inch (483 mm) equipment rack.

19
Units can be combined with the same models in the 850 W series for

customer applications.

Purchasing Rack Mount Kits

Contact Customer Service (see “Contact Information” on page i) about
purchasing the Rack Mount Kit options for XTR 850 Watt. For a list of
the part numbers, see
Installation information for the different rack mount options are provided
with the rack mount kits.

For XTR product support, visit www.programmablepower.com and
navigate to the XTR home page.

“Part Numbers for Rack Mount Kits” on page iii.

Ventilation

Whether operating the power supply in a rack or on a bench, allow air to
reach the ventilation inlets on the front and rear of the unit for cooling.
The direction of airflow is from the front of the unit to the back of the
unit. Ventilation space is not required at the top, bottom or sides of the
power supply.

2-4 M370185-01

Step 3: Connecting AC Input Power

WARNING: Shock hazard

Disconnect AC power from the unit before removing the cover. Even with the
front panel power switch in the Off position, live line voltages are exposed when
the cover is removed. Repairs must be made by an Authorized Service Center.

Step 3: Connecting AC Input Power

WARNING: Shock hazard

There is a potential shock hazard if the power supply chassis and cover are not
connected to an electrical ground via the safety ground in the AC input
connector. Ensure that the power supply is connected to a grounded AC outlet
with the recommended AC input cord configured for the available line voltage as
described in this section.

WARNING: Shock hazard

The AC input cord is the disconnect device for the power supply. The plug must
be a non-locking plug which is readily identifiable by and accessible to the
operator. The input cord must be no longer than 9.84 feet (3 m).

AC Input Connector

The AC input connector is a standard IEC 16 A 250 V male connector
located on the rear panel of the power supply. The AC input cord
provided is rated for 30

2

A, 300 V and appropriate for use in any country.

M370185-01 2-5

Installation

Step 4: Selecting Load Wires

This section provides recommendations for selecting minimum load wire
sizes.

Load Wiring

To select the wiring for connecting the load to the power supply, consider
the following factors:

• Insulation rating of the wire.

• Current carrying capacity of the wire.

• Maximum load wiring length for operation with remote sense lines.

• Electrical noise and impedance effects of the load lines.

Insulation Rating

Use load wiring with a minimum insulation rating equivalent to the
maximum output voltage of the power supply.

Current Carrying Capacity

The load wiring must have a current carrying capacity greater than the
output rating of the power supply to ensure that the load wiring will not be
damaged if the load is shorted.
rating for various gauges of wire rated for 105 °C operation, based on a
maximum current density of 450

Table 2-2 shows the maximum current

A/cm2.

Operating at the maximum current rating shown in Table 2-2 results in an
approximately 30 °C temperature rise for an appropriately-sized load wire
operating in free air. Where load wiring must operate in areas with
elevated ambient temperatures or bundles with other wiring, use larger
gauges or wiring rated for higher temperatures.

Table 2-2

Wire Size
(AWG)

20 2.5 6 61
18 4 4 97
16 6 2 155
14 10 1 192
12 16 1/0 247
10 21 2/0 303
8 36

2-6 M370185-01

Current Carrying Capacity for Load Wiring

Maximum Current
(Amps)

Wire Size
(AWG)

Maximum Current
(Amps)

Step 4: Selecting Load Wires

Maximum Load Wiring Length For Operation With Sense Lines

2

Figure 2-1

Noise and Impedance Effects

T o minimize noise pickup or radiatio n, use shielded twisted pair wiring of
the shortest possible length for load sense wires. Connect the shield to the
power supply chassis. Where shielding is impossible or impractical,
simply twisting the wires together will offer some noise immunity.

Maximum Load Wire Length for 1 V Line Drop

M370185-01 2-7

Installation

Step 5: Performing Functional Tests

The functional test procedures include:

• Power-on and front panel functional checks

• Voltage mode operation and current mode operation checks.
For information on local operation, see “Local Operation” on page 3–1

for adjusting front panel controls and settings.

Powering the Power Supply On/Off

To power on the power supply:

1. Ensure that the front panel power switch is in the Off position.

2. Ensure that the AC line voltage is within operating range.

3. Connect the line cord to a grounded AC outlet.

4. Turn the front panel power switch to the On position.
After a short power-on delay, 8888 8888 illuminates on the output

voltage and current displays, followed by PSU On.
After approximately 1 second, the display returns to normal status.

To power off the power supply:

◆ Turn the front panel power switch to the Off position.

AC FAIL will blink on the display. The ALARM LED illuminates.
After a short delay, all lights on the display will not be illuminated.

2-8 M370185-01

Voltage and Current Mode Operation Checks

To perform the voltage and current mode operation checks:

1. Ensure that the front panel power switch is in the On position and the

output is disconnected.

2. If the OUTPUT ENABLE Main button is illuminated, press the

button to turn off the output.

3. To check voltage mode operation, turn the 9-position mode control to

the VOLTS position.
The voltage set point will blink dimming and then return to full

brightness. For more information, see

4. Adjust the voltage to 5 V.

5. To check current mode operation, turn the 9-position mode control to

AMPS position.
Verify that the current set point is blinking in the output current

display.

6. Adjust the current to 1 A.

7. Press the OUTPUT ENABLE Main button to turn On.

Step 5: Performing Functional Tests

2

“Local Operation” on page 3–1.

8. Turn the front panel power switch to the Off position.

9. Turn the front panel power switch to the On position.

10. Connect a short circuit across the output terminals. Use leads of

sufficient current carrying capacity. (See
Wires”.)

11. Press the OUTPUT ENABLE Main button to enable the output. The

button will be illuminated when the output is enabled.
CC Mode LED illuminates and the voltage and current are displayed.
CV Mode LED illuminates and the preset load current is displayed.

12. Turn the front panel power switch to the Off position.

M370185-01 2-9

“Step 4: Selecting Load

Installation

Step 6: Connecting Loads

This section describes how to connect loads to the power supply for both
single and multiple loads.

WARNING: Shock hazard

There is a shock hazard at the power supply output when operating at an output
greater than 40 V. T o protect personnel against accidental contact with hazardous
voltages, ensure that the load and its connections have no accessible live parts.

CAUTION: Cable damage

When making connections to the output terminals, ensure terminals of opposite
polarity do not touch. Load cables and sense wires should be provided with strain
relief.

DC Output Connectors

WARNING: Shock hazard

Disconnect the AC input before making any connections. A shock hazard may be
present at the output terminals. Allow 15 seconds after the AC power has been
removed before making any connections.

6 V–40 V Models

The 6 V–40 V models are equipped with output terminals, as shown in
Figure 1-3.

60 V–150 V Models

The 60 V–150 V models are equipped with output connectors, as shown

Figure 1-4. These models have output currents that may require users

in
to use wire diameters that would not fit into a single output connector, so
there are two output connectors in parallel to increase the potential current
carrying capacity of load wiring.

300 V–600 V Models

The 300 V–600 V models are equipped with output connectors, as shown

Figure 1-5.

in

2-10 M370185-01

Inductive Loads and Batteries

CAUTION

The XTR power supply requires freewheeling and blocking diodes across the
output while driving inductive loads or batteries to protect the power supply from
damage caused by power being fed back into the supply and from high voltage
transients.

Step 6: Connecting Loads

Selecting
Diodes

The diode must have a voltage rating at least 20% greater than the power

2

supply's output voltage and have a current rating greater than or equal to
the power supply's output rating. Connect the cathode to the positive
output and the anode to the return.

Where positive load transients such as back EMF from a motor may
ocAMPS, connect a Transient Voltage Suppressor (TVS) or a varistor
across the output to protect the power supply. The breakdown voltage
rating for the TVS or varistor must be approximately 10% higher than the
rated supply output.

Figure 2-2

For a detailed Application Note, please go to:
www .programmablepower.com and click SUPPORT.

M370185-01 2-11

Diode Placement

Installation

Connecting Single Loads

Figure 2-3 shows the recommended load connections for a single load
which is sensing its voltage locally. Local sense lines shown are the
default connections at the rear panel APG J1 connector (see
page 4–5). The load lines should use the largest gauge and shortest length
of wire possible to ensure optimal performance.

You do not need remote sensing for basic operation of your power supply .
However, if you wish to correct any small drops in your load lines, then
use the remote sensing feature. See
on page 2–13 for more information.

Figure 4-1 on

“Step 7: Connecting Remote Sensing”

Local Sense

–

Power Supply

Local Sense

+

Figure 2-3

Connecting Single Loads

Connecting Multiple Loads

The proper connection of distributed loads is an important aspect of
power supply use. The common method of connection is a radial load
connection. Power is connected to each load individually from a single
pair of terminals designated as the positive and negative distribution
terminals. This pair of terminals may be the power supply output
terminals, the load terminals, or a distinct set of terminals especially
established for distribution use. In this scheme, there are no ground loops
and the effect of one load upon another is minimized.

+

Output

–

J1.1
J1.2

Output

J1.5
J1.6

+

Terminal

–

Terminal

Load

2-12 M370185-01

Step 7: Connecting Remote Sensing

WARNING: Shock hazard

There is a potential shock hazard at the sense connectors when using a power
supply at an output greater than 40 V. Select wiring with a minimum insulation
rating equivalent to the maximum output voltage of the power supply for use as
local sense jumpers or for remote sense wires. Ensure that connections at the load
end are shielded to prevent contact with hazardous voltages.

Remote sensing permits you to shift the regulation point of the power
supply from the output terminals to the load or other distribution
terminals.

Use shielded twisted pair wiring of 20 to 26 AWG for best noise
performance. Make sure that the shielded twisted pair wiring insulation is
rated higher than the maximum output voltage of the power supply. If
possible, one end of the shield of the sense lines should be attached to the
chassis ground of the power supply.

Step 7: Connecting Remote Sensing

2

Pin J1.6 on APG
connector

Pin J1.1 on APG
connector

Output terminals on
power supply

Figure 2-4

Remote Sense Connection

-SNS

+SNS

load

output +

output -

Chassis ground stud

To connect the remote sense wires:

1. Ensure that the front panel power switch is in the Off position.

2. Using a small flat blade screwdriver, remove the two sense jumpers

from pins J1.1 and J1.2, and from pins J1.5 and J1.6 on the APG
Connector. See

Figure 4-1, “APG Connector Terminals” on page 4–5.

M370185-01 2-13

Installation

3. Connect one end of the shield of the twisted pair wire to the chassis
ground point on the power supply.

4. Connect the positive sense line (+SNS) from the positive regulation
point as close as possible to the load terminals to pin J1.1.

5. Connect the negative sense line (–SNS) from the return of the load to
pin J1-6.

To compensate for losses in power leads connected to the output, the
power supply provides sense connections beside the output terminals.
With remote sense leads in place, the power supply regulates to the
displayed voltage at the point where the sense lines are connected to
the output leads. With the sense lines disconnected, the power supp ly
regulates the voltage at the output terminals.

CAUTION: Equipment damage

Do not operate the power supply with sense lines connected to the load without
also connecting the load power leads to the output terminals.

CAUTION: Reverse polarity

Avoid reversing positive (+) and negative (–) sense connections.
When using remote sense to compensate for load line losses, ensure that the
positive sense line is connected to the positive load terminal and the negative
sense line is connected to the negative load terminal. Do not reverse these
connections or the power supply may be damaged.

Important:

sensing can cause voltage instability due to inductance of the load leads.
Measures to reduce inductance and/or capacitance (raising resonant frequency)
or using local sense can be beneficial in stabilizing the system.

2-14 M370185-01

Long load leads with large capacitance at the load and remote

3

Local Operation

Chapter 3, Local Operation, provides the procedures for
local (front panel) operation such as:

• Configuring settings.

• Operating in constant voltage mode and constant
current mode.

• Using the protection features.

• Using multiple power supplies.

Local Operation

Introduction

Once you have installed the power supply and connected both the AC
input power and the load (covered in “Installation” on page 2–1), the
power supply is ready for local operation. To turn the power supply on,
see “Powering the Power Supply On/Off” on page 2–8.

Configuring Settings from the Front Panel

Using the 9-Position Mode Control

The 9-position mode control is used with the rotary Adjust/Enter control
to configure settings in local operation. See Figure 1-2, “Front Panel
Display and Controls” on page 1–5 for location of the front panel
features.

Using the 9-position mode control, select one of nine modes: VOLTS,
AMPS, FLD, PRT, SAV, RCL, CAP, and VAP. See Figure 3-1 and Table
3-1 for detailed information on the nine modes.

Figure 3-1

9-Position Mode Control

Using the Rotary Adjust/Enter Control

The rotary Adjust/Enter control is used to change settings and set the
value selected. The front panel displays information on the output voltage
and output current displays. Each display has a maximum of four
characters that are made up of 7 segments.

3-2 M370185-01

Coarse and Fine Adjustment Modes

The coarse and fine adjustment modes are used for setting the voltage and
current set points, OVP and UVP settings.

Coarse
adjustment
mode

When using local operation to set the current and voltage set points, use
the coarse adjustment mode (default) followed by the fine adjustment
mode (see next). The coarse adjustment mode quickly adjusts the settings
in large increments to reach the desired value.

Configuring Settings from the Front Panel

Fine adjustment
mode

Pressing the rotary Adjust/Enter control to change the mode to fine
adjustment mode, provides the ability to manipulate the last significant
digit. Once the exact desired value for the setting has been selected, press
the rotary Adjust/Enter control to commit the value to the unit.

Table 3-1

9 Positions on the Mode
Control Knob

VOLTS (Volt a ge
Programming)

AMPS (Current
Programming)

FLD (Foldback) Select Foldback option: CC, CV or

PRT (Protection) Select the OVP set point (see

Select and Set from the Front Panel

Turning the rotary Adjust/Enter
control lets you…

Select the voltage set point in coarse
or fine adjustment modes. See
“Automatic Mode Crossover” on
page 3–13.

Select the current set point in coarse
or fine adjustment modes. See
“Constant Current Mode Operation”
on page 3–13.

none. See “Setting Foldback Mode”
on page 3–24.

page 3–26).
Select the UVP set point (see
page 3–28.)
Select OTP temperature and
Shutdown (see page 3–30.)

Pressing the rotary Adjust/
Enter control lets you…

Set the value selected and
cycle to the next setting.

Set the value selected and
cycle to the next setting.

Set the value selected and
cycle to the next setting.

Set the value selected and
cycle to the next setting.

3

SAV (Save User Preset) Select the user setting memory

RCL (Recall User Preset) Select the user setting memory

M370185-01 3-3

location. See “Saving User Setting
Memory Locations” on page 3–37.

location. See “Recalling User
Setting Memory Locations” on
page 3–38.

Save user setting memory
values.

Load user setting memory
values into the power supply.

Local Operation

Table 3-1

9 Positions on the Mode
Control Knob

CAP (Current Analog
Programming)

VAP (Voltage Analog
Programming)

PGM (Programming Options) Select the remote interface to be

Select and Set from the Front Panel

Turning the rotary Adjust/Enter
control lets you…

Select the programming source and
select the range.

Select the programming source and
select the range.

used for control, local lockout or
current sharing.

Pressing the rotary Adjust/
Enter control lets you…

Set the value selected and
cycle to the next setting.

Set the value selected and
cycle to the next setting.

Select interface/Option and
cycle to the next setting.

3-4 M370185-01

Navigating the Menu System

The menu system of the XTR follows a select and set model with the
exception of the VOLTS and AMPS modes. See “Setting VOLTS and
AMPS Modes”.

The general procedure for setting up the features in the select and set
model is:

1. To select a mode, rotate the 9-position Mode control to the desired
mode or press the rotary Adjust/Enter control once to activate the
current selection on the mode control knob. See Figure 3-3.

2. To select the feature or setting, rotate the rotary Adjust/Enter control
to scroll through the different available settings of that mode.

The settings appear on the output current display.

3. Press the rotary Adjust/Enter control to select the feature or setting.

4. Set each value using the rotary Adjust/Enter control. When the value
has been selected, press the rotary Adjust/Enter control to commit the
updated value. Additional values may become available, depending
on the setting that is being configured.

Navigating the Menu System

3

Setting VOLTS and AMPS Modes

The only exceptions to the select and set model are the VOLTS and
AMPS modes which do not allow the selection of tracking and select and
set mode by turning the rotary Adjust/Enter control. In VOLTS and
AMPS modes, the default entry mode setting is automatically selected as
either voltage or current tracking, respectively.

Voltage and current values can be set in tracking mode or select and set
mode using the rotary Adjust/Enter control:

• Tracking mode—the new values take effect as the rotary Adjust/Enter
control is rotated.

• Select and set mode—the new values do not take effect until the
rotary Adjust/Enter control is pressed. See “Normal Display Mode
and Inactivity Timeout” on page 3–7.

M370185-01 3-5

Local Operation

To access the tracking mode for entering voltage and current:

1. Select the VOLTS or AMPS position on the 9-position mode control.
If the set point is blinking, the unit is in coarse tracking mode.

• When the VOLTS mode is selected, the voltage set point will

blink in the output voltage display.

• When the AMPS mode is selected, the current set point will blink

in the output current display.

2. Use the rotary Adjust/Enter control to adjust the set point.
The adjustments you make to the set point affect the opposing output

value (voltage when in AMPS mode or current when in VOLTS
mode), which will update in the non-blinking display.

3. Press the rotary Adjust/Enter control to enter fine adjust tracking
mode.
The set point blinks faster when the unit is in fine adjust tracking
mode.

4. Use the rotary Adjust/Enter control to fine tune the set point.

5. Once the set point has been selected, press the rotary Adjust/Enter
control to exit tracking mode and return to normal display mode.

To access the select and set entry mode for the voltage and current set
points:

1. Select VOLTS or AMPS position on the 9-position mode control.

2. Press the rotary Adjust/Enter control three times in succession to
enter coarse Pre-Set Adjustment.

3. Press the rotary Adjust/Enter control one more time to enter fine Pre­Set Adjustment.

4. Press the rotary Adjust/Enter control once again to set the value.

The units can also timeout (adjustable) to exit the menu. Once Pre-Set
Mode is entered, crpc and fnpc will appear in the voltage display.

3-6 M370185-01

Normal Display Mode and Inactivity Timeout

Normal display mode appears on the output voltage and current displa ys
when the configuration changes from the front panel have been completed
or when the inactivity timeout occurs (default is 3 seconds). Normal
display mode shows the output voltage and current values.

If a timeout occurs before the changes made to the value have been set,
the changes will not be saved and you will have to re-enter the changes.
The inactivity timeout is variable from 1 to 20 seconds and can only be
changed using the SCPI command.

The SCPI command (s) for these instructions are:

[:]SYSTem[<channel>]:FPANel[:TIMeout]

Navigating the Menu System

Figure 3-2

Important:

beginning users and expert users don't have to use the same timeout

Front Panel

Each user memory setting location stores the timeout so that

3

M370185-01 3-7

Local Operation

Figure 3-3

3-8 M370185-01

Front Panel Menu System

Display Messages on the Front Panel

Display Messages on the Front Panel

The front panel displays on the power supply will use text as shown in
Table 3-2 to indicate the status or mode.

Table 3-2

Display Text Text Description

0 Negative Polarity
232 RS 232
485 RS 485
8888 All segments On, Power Up
| Positive Polarity
AC Alternating Current
ADDr RS 485 Address
ANPR Analog Programming
AS Power On Autostart
AvAS Auxiliary Autostart
CAPr Current Analog Programming
CLr Clear
CC Constant Current
COn7 Controller
CU Constant Voltage
CrPC Coarse Current Pre-set Mode
CrPU Coarse Voltage Pre-set Mode
CShr Current Share (same as CUrrShAr)
CUrr Current
CUrrShAr Current Share (same as CShr)
deLa Fold Delay
done Done
Err Error (debug)
F0LD Foldback
FAIL Fail
FAn Fan
FLA Flash
FnpC Fine Current Preset Mode
FnPU Fine Voltage Preset Mode
FLd Foldback
HBP5 Data rate (kbps)
6PIB GPIB Interface

Front Panel Display Text

3

M370185-01 3-9

Local Operation

Table 3-2

Display Text Text Description

In Interlock
LAn ENET Interface
LE C Current APG Level
LE U Voltage APG Level
Loc Lock
LOCL Local
OFF Off
On On
OU7P Output Protection
OCP Over Current Protection
O7P Over Temperature Protection
OUP Over Voltage Protection
OvPF Over Voltage Protection fine adjustment
OUPC OVP Calibration
POL Polarity
Pr0 Protection mode
PSU Power Supply Unit
R IS Isolated Resistive Analog Programming
rCL Recall Preset
rE Remote Programming/Interface
rnIS Non-Isolated Resistive Analog Programming
Con7 Controller (current share controller)
5hAr Share (current share)
ChAn Multichannel Remote Int e rf ace
S rS Soft reset
SAUE Save Preset
Sd Shutdown
SLA Slave (current share slave)
U IS Isolated Analog Voltage Programming
UN IS Non-Isolated Analog Voltage Programming
USb USB Interface
UUP Under Voltage protection coarse adjustment
UvPF Under Voltage protection fine adjustment
UAPr Voltage Analog Programming
UOL Volt age

Front Panel Display Text

3-10 M370185-01

Display Messages on the Front Panel

A blinking numeric value is either a vol tage o r c urr ent se t p oint in tracking
mode. The display in which the set point appears, output voltage or output
current display, indicates the type of set point, voltage or current.

3

M370185-01 3-11

Local Operation

Standard Operation

The power supply can be controlled by two methods, either from the front
panel or from any of the remote interfaces. Front panel control is referred
to as local operation (default setting) while control via any of the remote
interfaces is called remote operation. To set up the power supply for
remote operation, see Chapter 5, “Remote Operation”. Once the remote
connection has been established, the power supply can switch seamlessly
between local operation and any digital interface (RS-232, RS-485,
GPIB, USB and Ethernet).

Local lockout is a feature that allows the front panel to be locked so that
accidental button presses are ignored. This feature is often used to lock
out the front panel while a user is controlling the power supply from a
remote location.

The output of the power supply has two modes of operation: Constant
Voltage (CV) mode (see page 3–13) and Constant Current (CC) mode
(see page 3–13). Both of the operating modes are available regardless of
which control method (local or remote) is used.

Operating Modes

The output mode in which the power supply operates at any given time
depends on the following factors:

• Output voltage set point V

SET

Note: the M10 Option includes a preset function to automatically
reset the output voltage to zero Volts at both power on and output
enabled, unless deliberately programmed otherwise (see Output
Protection, page 3-33).

• Output current set point I

• Impedance of the attached load R

SET

L

The two output modes of operation are Constant Voltage (CV) mode (see
page 3–13) and Constant Current (CC) mode (see page 3–13).

Output enabled When the output is turned on, both the voltage and current rise as quickly

as possible to try and reach the set points (V

SET

and I

SET)

that were
configured prior to enabling the output. Initially the unit will operate in
CV mode, which is the default mode. As the voltage and current rise to
meet the requirements of the load, the set point that is reached first (based
on the R

3-12 M370185-01

either V

L,

SET or ISET

) will determine which mode the power

Standard Operation

supply will remain in. The operating mode is indicated by either the CC
mode LED or the CV mode LED, one of which will illuminate on the
front panel.

Output disabled The mode of operation is not determined until the output is enabled. The

CV and CC mode LEDs will not indicate the mode while the output is
disabled.

Constant Voltage Mode Operation

If the output is enabled and the configured current set point is much
higher than the requirements for the attached load, then the voltage will
rise until it reaches the voltage set point. When the output voltage reaches
the voltage set point, it stops rising. The unit will continue to operate in
CV mode. The load current will still vary to meet any changes in required
load current draw resulting from a change in the attached load.

Constant Current Mode Operation

If the output is enabled, the voltage and current start to rise. At this time
the unit is operating in CV mode (default operational mode). As the load
current drawn reaches the value of the output current setting, the unit will
switch to CC mode and not allow any additional current to be drawn
above the value of I
voltage will still vary to meet any changes in required output voltage
resulting from a change in the attached load.

. The unit is now operating in CC mode. The

SET

3

Automatic Mode Crossover

Mode crossover occurs when the unit makes the switch between operating
modes. Crossover can occur from CV to CC or vice versa, depending on
how the attached load resistance changes. Figure 3-4 shows the
relationships between the variables.

For example, if the unit was initially operating in CV mode with the
output voltage at the voltage set point and the load current below the I
and the attached load resistance began to decrease, the current would rise
to meet this change in the load. The load current will increase in
proportion to the decrease in the load resistance until the load current
drawn reaches the current set point. At this point further decreases in load
resistance (increased load current requirements) will cause the unit to
cross over into CC mode where the output voltage will vary with
changing load resistance and the load current will remain at the I
value.

M370185-01 3-13

SET

SET

Local Operation

The reverse operating mode change can also occur if the load resistance is
increased to the point that the required load current drops below the I

SET

value. At that point the power supply would crossover to CV mode and
the load current would be free to vary as the load resistance changed.

Figure 3-4

Operating Modes

To set

the voltage set point (V

SET):

1. Turn the 9-position mode control to the VOLTS position or press the

rotary Adjust/Enter control if the 9-position mode control is already
at the VOLTS position.

The voltage set point is blinking in the output voltage display. The
output current will be displayed in the output current display.

2. Set the desired voltage value using the rotary Adjust/Enter control.

Important:

change the set points for OVP.

If you can’t get the set point to the desired level, you may need to

3. Press the rotary Adjust/Enter control to transition to Fine Adjust

mode.
The set point will blink faster to indicate fine adjust tracking mode.

4. Set the desired voltage value using the rotary Adjust/Enter control.

3-14 M370185-01

Standard Operation

5. Once the desired value has been set, press the rotary Adjust/Enter
control to commit the setting.

Quick Tip
Remote operation
uses these SCPI
commands. See
page 5–1.

Important:

output voltage up to 105% over the model-rated maximum value. The power
supply will operate within these extended ranges, but full performance to
specification is not guaranteed.

The control circuits have been designed to allow you to set the

The SCPI command (s) for these instructions are:

[[:]SOURce[<channel>]]:VOLTage[:LEVEl][:IMMediate]
[:AMPLitude]

Important:

are limited by the Over Voltage Protection and Under Voltage Protection settings.

To set the current set point (I

The maximum and minimum setting values of the output voltage

):

SET

1. Turn the 9-position mode control to the AMPS position or press the
rotary Adjust/Enter control if the 9-position mode control is already
at the AMPS position.

The voltage set point is blinking in the output voltage display. The
output current will be displayed in the output current display.

2. Set the desired current value using the rotary Adjust/Enter control.

3. Press the rotary Adjust/Enter control to transition to Fine Adjust
mode.

The set point blinks faster to indicate fine adjust tracking mode.

4. Set the desired current value using the rotary Adjust/Enter control.

3

5. Once the desired value has been set, press the rotary Adjust/Enter

Important:

current can be set up to 105% over the model-rated maximum values. The power
supply will operate within these extended ranges, but full performance to
specification is not guaranteed.

The SCPI command (s) for these instructions are:

[[:]SOURce[<channel>]]:CURRent[:LEVEl][:IMMediate]
[:AMPLitude]

M370185-01 3-15

control to commit the setting.

The control circuits have been designed so that output

Local Operation

Shipped Configuration (Local Operation)

The power supply is configured for local operation at the factory. See
Table 3-3 for a summary of this configuration. For more information on
default settings, see Table 3-9 on page 3–40.

Table 3-3

Local Control Configuration Additional References

Use the front panel controls to
adjust the output voltage and
current set point settings.

The OVP set point is adjusted at
the front panel to 105% above the
maximum rated output voltage.

Shipped Configuration

Enabling the Output

Enabling the output on will also turn off the ALARM LED if the ALARM
LED has been latched on due to an alarm triggering and automatically
clearing. See “Alarms and Errors” on page 3–19.

To enable the output power:

u Press the OUTPUT ENABLE Main button on the front panel or enter

the SCPI command.
The OUTPUT ENABLE Main button will illuminate.

To disable the output power:

u Press the OUTPUT ENABLE Main button when the OUTPUT

ENABLE Main button is illuminated.
The output will be disabled and the LEDs will not be illuminated.

See Chapter 3, “Local Operation” for front
panel operation. See Chapter 4, “Analo g
Programming (APG) and Isolated Analog
Programming (ISOL)” for analog
programming procedures.

See “Using Over Voltage Protection
(OVP)” on page 3–26 for the adju stment
procedure.

Important:

activated. See “Using the External Shutdown Function” on page 3–31.

Quick Tip Remote
Operation uses
these commands.
See page 5–1.

3-16 M370185-01

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel>][:POWer][:STATe]

The main output will not turn on if the shutdown function is

Enabling the Auxiliary Output

To enable on the auxiliary output:

u Press the OUTPUT ENABLE Aux button on the front panel.

The OUTPUT ENABLE Aux button will illuminate.

Enabling the Auxiliary Output

Important:

AUX_ON_OFF signal line is being used to disable the auxiliary outputs.
See “AUX Output and Isolated Analog Programming (ISOL) Connector” on
page 4–20.

To disable the auxiliary output:

u Press the OUTPUT ENABLE Aux button on the front panel again.

The OUTPUT ENABLE Aux button will not be illuminated.

If the auxiliary output is activated, +5 V on J3.9 (+AUX1) and +15 V on
J3.11 (AUX2) will be present with respect to Pin J3.2 or Pin J3.6
(COM_ISOLATED). (See also “AUX Output and Isolated Analog
Programming (ISOL) Connector” on page 4–20 for more details.)

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel>]:AUXiliary[:STATe]

The auxiliary output will not be enabled if the external

Output Auto Start Mode (Auto Restart)

The Auto Start mode establishes the state of the output of the power
supply after recovery from a complete power cycle (all front panel LEDs
are not illuminated).

If Auto Start mode is set to On, the power supply output will return to its
previous value when the power supply is powered up again.

3

If Auto Start mode is set to Off, the power supply output will remain off
after the power supply is powered up again.

To change the Auto Start mode:

1. Press and hold the OUTPUT ENABLE Main button for 1 second.

2. Switch the Auto Start mode.

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel>][:POWer][:STATe]:PowerON[:STATe]

M370185-01 3-17

AS On or AS Off is displayed.

Local Operation

Auxiliary Auto Start Mode

The Auxiliary Auto Start mode determines the state of the auxiliary
output after a complete power cycle (all front panel LEDS are not
illuminated). With Auxiliary Auto Start mode turned to On, the auxiliary
output will be activated after the power supply is powered up again.

To define the Auxiliary Auto Start mode:

1. Press and hold the OUTPUT ENABLE Aux button for 1 second.
AuAS On or AuAS Off is displayed.

2. To change to status to On or Off, press the OUTPUT ENABLE Aux
button.

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel>]:AUXiliary:PowerON[:STATe]

3-18 M370185-01

Alarms and Errors

Several conditions can cause alarms in the XTR. Some conditions are:

• From user configurable features.

• Controlled in hardware and will trigger regardless of configuration.
All alarms, with the exception of the Fan alarm, will result in the output of

the power supply being disabled. The Fan alarm does not affect the output.
When an alarm is triggered, the appropriate alarm message will begin

blinking on the display and the Alarm LED will be illuminated.It is
possible that more than one alarm will trigger at the same time. When this
occurs, the alarm with the highest precedence will blink on the display.
Table 3-4 lists the precedence of alarms. If the alarm is cleared and the
event which caused the alarm has not been corrected, then the alarm may
trigger again immediately . Fix the reason for the alarm before you clear it.

Alarms and Errors

3

Table 3-4

Alarm Precedence Output

AC Fail 1 (Highest) Yes No
Over Temperature Protection (OTP) 2 Yes No
Fan 4 No Yes
Interlock 6 No No
Over Voltage Protection (OVP) 7 Always No
Over Current Protection (OCP) 8 Always No
Foldback 9 Yes Yes
External Shutdown 10 No Yes
Under Voltage Protection (UVP) 11 (Lowest) No Yes

Flash Checksum Failure

1.The Flash Checksum Failure alarms are an exception as they can only occur during boot up
or recalling a user setting slot. If a checksum error is detected when recalling a user slot, no mod­ification of settings will occur, and an error will be pushed to the SCPI error queue. If a check­sum occurs at boot-up, then this checksum error can be cleared by doing a soft reset or by power
cycling the unit.

Alarm Order of Precedence

1

Maskable Display

Latch

N/A N/A N/A

AC Fail

O7P Pro

FAn Pro

In Loc

OVP Pro

OCP pro

FLD Pro

SD POL

UUP Pro

FLA FAIL

M370185-01 3-19

Local Operation

Clearing Alarms

Clearing Triggered and Manual Alarms

To clear a triggered alarm, use one of the following methods:

• Turn the power supply Off and then On.

• Press and hold the rotary Adjust/Enter control for 3 seconds.

To clear a manual alarm:

1. Press and hold the rotary Adjust/Enter control for 3 seconds.
The ALr CLr message will be displayed on the front panel for a few

seconds.

Important:

highest precedence alarm is cleared. If another alarm has occurred, then this
alarm will now become the highest precedence alarm and will begin blinking on
the display.

2. Repeat the alarm clearing until you have cleared all alarms.

Clearing a Flash Failure Alarm

The Flash Failure alarm is the only exception for clearing alarms. If a
flash failure occurs at boot time, it can only be cleared by a soft reset key
combination press (see “Resetting the Power Supply” on page 3–40) or
by power cycling the unit. If a checksum error is detected when recalling
a user slot, no modification of settings will occur, and an error will be
pushed to the SCPI error queue. The alarm will clear after a duration per
the currently configured front panel timeout setting.

To clear a triggered alarm, use one of the following methods:

• Turn the power supply Off and then On.

• For failures that occur during a recall of user memory settings, wait
the duration of the currently configured front panel timeout.

• Press and hold the reset key combination (Flash Fail ONLY). See
“Resetting the Power Supply” on page 3–40.

When an alarm is cleared by using this method, only the current

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel>]:PROTection:CLEar

3-20 M370185-01

Clearing Automatic Alarms

Some alarms will clear automatically when the condition that caused the
alarm is no longer present. When an alarm automatically clears, the
output voltage and current displays will return to normal, but the ALARM
LED will remain illuminated to indicate that an alarm has occurred. If an
automatic alarm is triggered, the normal alarm clearing procedure still
applies.

To clear the ALARM LED after an automatic alarm has cleared, use
one of the following methods:

• Send the SCPI Clear Alarm command.

• Press the OUTPUT ENABLE Main button to reenable the output.

The ALARM LED will no longer be illuminated.

For example, if one of the fans in the XTR was temporarily blocked,
causing a Fan alarm, then the blockage was cleared and the fans restarted,
the alarm would clear. The output voltage and current displays would be
in normal mode, but the ALARM LED would be illuminated. See “Front
Panel ALARM LED” on page 3–21 for information on other events that
affect the ALARM LED.

Alarms status is tracked in the SCPI status registers. For more details on
how and where the alarms are tracked, see “Standard SCPI Register
Structure” on page 5–34.

Alarms and Errors

3

Front Panel ALARM LED

The Alarm LED will illuminate due to one or more of the following
events occurring:

• OTP has been tripped.

• A fan has stopped.

• OVP has tripped.

• OCP has tripped.

• UVP has tripped

• Interlock is open circuit.

• AC power falls out of range.

• Foldback has tripped.

• Persistent storage checksum is wrong (Flash Fail alarm).

• Internal malfunction of power supply.

• Any alarm has tripped and been cleared automatically.

M370185-01 3-21

Local Operation

Alarm Masking

The alarm LED will remain illuminated until the alarm is manually
cleared (see “Clearing Triggered and Manual Alarms” on page 3–20) or
by turning the main output on if the alarm has automatically been cleared.

It is possible to completely disable some alarms through the use of the
alarm mask. If an alarm is masked then this masking will prevent it from
registering in the SCPI conditions registers as well as not triggering the
alarm. The alarms that can be masked are identified in Table 3-4 on
page 3–19. Setting the bit position (1) of an alarm will result in the alarm
being enabled. Clearing the bit position (0) of an alarm will result in the
alarm being masked/disabled.

For Example:
If you wanted to enable the OTP, Foldback and UVP alarms, you
would take the foldback value of 256 and the UVP value of 1024 to
get a mask of 1280. This is the value you would send with the SCPI
command.

Control of the alarm mask is only available using the SCPI command.

The SCPI command (s) for these instructions are:

[:]SYSTem[<channel>]:PROTection:MASK

The mask command takes a single parameter made up of the sum of the
values for the alarms that are to be masked. See Table 3-5 for the alarm
values associated with each maskable alarm.

Table 3-5

Alarm Bit Position Value

Fan 3 8
Foldback 8 256
External Shutdown 9 512
Under Voltage Protection (UVP) 10 1024

Alarm Mask Bit Positions

The SCPI command (s) for these instructions are:

[:]SYSTem[<channel>]:PROTection:MASK

3-22 M370185-01

Alarm Output Latching

When an alarm is triggered, the output will be disabled with the exception
of the Fan alarm. When an alarm is cleared, the alarm output latch
determines if the output should be re-enabled to the state before the alarm
occurred or if the output should remain in the off state.

Where setting the bit position (1) of an alarm latch will result in output
latching to the off state when the alarm is cleared and if cleared (0) output
will be re-enabled to the state before the alarm triggered.

To define the values for the bit position you determine which alarms you
want to latch. Read the value for this bit position from Table 3-6 and sum
them together. The result is the alarm last mask. Which you should send
with the SCPI command.

For Example:
If you wanted to enable latching for OTP and Foldback you would
take the OTP value of 2 and add it to the foldback value of 256 to get
a mask of 258. This is the value you would send with the SCPI
command.

The output latches are accessible through the SCPI command.

Alarms and Errors

3

The SCPI command (s) for these instructions are:

[:]SYSTem[<channel>]:PROTection:LATCh

The latch command take a single decimal parameter made up of the sum
of the values for the alarms to determine if they are to be latched in the off
state on clearing. See Table 3-6 for the values associated with each
latchable alarm.

Table 3-6

Alarm

AC Fail 0 1
Over Temperature Protection (OTP) 1 2
Foldback 8 256

M370185-01 3-23

Alarm Latch Bit Positions

Bit
Position Value

Local Operation

Setting Foldback Mode

Foldback mode is used to disable the output when a transition is made
between the operating modes. The power supply will turn off/disable the
output and lock in foldback mode after a specified delay if the power
supply transitions into CV mode or into CC mode, depending on the
foldback mode settings. This feature is particularly useful for protecting
current or voltage sensitive loads. Foldback can be set to trigger a switch
when transitioning from CV to CC mode or from CC to CV mode.

To set the foldback protection and foldback delay time:

1. Turn the 9-position mode control to the FLD position or press the
rotary Adjust/Enter control if the 9-position mode control is already
at the FLD position.

2. Select the type of crossover that will cause foldback to trigger by
using the rotary Adjust/Enter control.

If the mode selected is CC or CV mode, the foldback delay timer will
start on a transition into the selected mode. If the mode selected is
none, foldback is not enabled.

3. Press the rotary Adjust/Enter control when the desired mode has been
selected.

The FLD LED will illuminate and DELA will be displayed in the
output voltage display.

4. Adjust the desired d elay time using the rotary Adjust/Enter control.
The range can be set from 0.50 seconds to a maximum of 50 seconds.

The step size is in increments of 0.05 seconds when setting from 0.50
to 5 seconds and then in 1 second increments from 5 seconds to 50
seconds.

5. Once the desired foldback delay time has been selected, press the
rotary Adjust/Enter control to commit the foldback delay setting.

To disable foldback protection:

1. Turn the 9-position mode control to the FLD position or press the
rotary Adjust/Enter control if the control knob is already at the FLD
position.

2. FLd is displayed on the output voltage display and the output current
display shows the current foldback trigger mode.

3. Turn the rotary Adjust/Enter control until nonE is displayed in the
output current display.

3-24 M370185-01

Setting Foldback Mode

4. Press the rotary Adjust/Enter control to commit the setting once the

desired value has been set.

5. The green FLD LED will turn off and the display will return to the

normal display mode.

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel>]:PROTection:FOLDback[:MODE]
[:]OUTPut[<channel>]:PROTection:FOLDback:LATCh

Important:

select is the same as the current operating mode, the foldback timer will begin
counting immediately after the delay time has been set.

If you set foldback while the output is enabled and the trigger you

Resetting Activated Foldback Protection

To reset activated and latched foldback protection, press and hold the
rotary Adjust/Enter control for approximately 3 seconds.

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel>]:PROTection:CLEar

3

M370185-01 3-25

Local Operation

Using Over Voltage Protection (OVP)

The OVP circuit protects the load in the even t of an analog programming
error, an incorrect voltage control adjustment, or a power supply failure.
The OVP circuit monitors the output voltage at the output of the power
supply and will disable the output whenever a preset voltage set point is
exceeded. You can set the preset voltage trip point by using the 9-position
mode control on the front panel or via one of the remote programming
interfaces.

To prevent accidental tripping of the OVP while setting up, the firmware
will prevent the OVP set point from being less than 105% of the voltage
set point when in local set point control mode. When the XTR is in VAP
mode for defining voltage set point the set point limitation will be based
on the VAP input signal level. The user should note it is possible to trip
OVP in this mode if the OVP is configured when the analog program ming
source is off.

When the user attempts to configure an OVP setpoint that is less than
105% of the voltage set point via the front panel the set point will stop
allowing the value to decrement. If the user attempts to configure an OVP
set point that is less than 105% of the voltage set point via SCPI a -221,
"settings conflict error" will be pushed onto the error queue.

3-26 M370185-01

Defining the OVP Set Point

To define the OVP set point:

1. Turn the power supply On.

Ensure the voltage is lower than the desired set point.

2. Set the output to the desired voltage.

OVP can be set without setting desired output voltage first.

3. Turn the 9-position mode control to the PRT position.

Pro OUP is displayed.

4. Press the rotary Adjust/Enter control.

5. Turn the rotary Adjust/Enter control to set the upper limit protection.

Using Over Voltage Protection (OVP)

See “Coarse and Fine Adjustment Modes” on page 3–3.

Important:

The OVP range is variable from V

+5% to V

SET

MAX

+25%.

6. Once the desired value has been set, press the rotary Adjust/Enter

control to commit the setting.

The SCPI command (s) for these instructions are:

[[:]SOURce[<channel>]]:VOLTage:PROTection[:OVERvoltage]
[:LEVel]

If the output is between OVP

and –5%, an OVP warning message is

set

possible when in APG mode.

3

M370185-01 3-27

Local Operation

Using Under Voltage Protection (UVP)

Important:

of model voltage.

UVP will not be active for voltage set points that are less than 1%

The UVP prevents voltage settings below a set value. The UVP lets you
create a voltage window of operation when used in conjunction with the
OVP setting. The UVP range is variable from 0 V to OVP

SET

–10%.

The UVP is a protection that becomes active after the output is enabled
and a period of time has passed to allow the output to reach its set point
value before the UVP protection begins monitoring. As with OVP if the
voltage set point is determined by analog control (VAP) and the voltage
strays to within 5% of the UVP set point then UVP Safe will trigger to
warn the user that they are about to trigger the UVP alarm.

The period of time before the UVP monitoring is active after the output is
enabled is determined by the rise-time delay for the model as listed in
Table C-2, “Remote Operation” on page C–4 on the row called Up-prog
Response Time, 0 - Vmax. Since the rise time is based on a purely
resistive load the user should be aware that UVP triggering might be
possible in capacitive or rectifier loads due to the rise time being longer.
In these cases it is recommended that the user mask the UVP alarm until
the rise time has elapsed and then unmask the alarm to allow UVP
protection to be enabled during operation.

3-28 M370185-01

Defining the UVP Set Point

To define the UVP set point:

1. Turn the power supply On.

2. Set the output to the desired voltage.

3. Turn the 9-position mode control to the PRT position.

PRo OUP is displayed.

4. Turn the rotary Adjust/Enter control until PRo UUP is displayed.

5. Press the rotary Adjust/Enter control to select the UVP for setting up.

6. Set up the lower limit protection using the rotary Adjust/Enter

control.

Over Current Protection (OCP)

Important:

7. Once the desired value has been set, press the rotary Adjust/Enter

control to commit the setting.
See “Coarse and Fine Adjustment Modes” on page 3–3.

The SCPI command (s) for these instructions are:

[[:]SOURce[<channel>]]:VOLTage:PROTection:UNDer[:LEVel]

The UVP range is variable from 0 volts to OVP

Over Current Protection (OCP)

The OCP alarm is a firmware alarm that is only configurable using the
SCPI interface. The OCP triggers if the output current exceeds the OCP
set point. Because the OCP alarm is a firmware based alarm it has a
latency before detection of the condition can occur. The user should be
aware of this latency and take this into consideration when relying on
OCP to protect a sensitive load. The maximum period for detecting an
OCP condition is 300 ms.

OCP is fixed at 110% of rated current.

SET

–10%.

3

M370185-01 3-29

Local Operation

Using Over Temperature Protection Lock (OTP)

The OTP lock protects the power supply in the event of an over
temperature alarm. This alarm could be caused by ventilation restriction
or overheating due to fan failure.

Two modes are available:

• Auto recovery (OTP OFF) where the power supply turns on again
after cooling down.

• Latch mode (OTP ON) where you will need to reset the unit by
turning the front panel power switch to Off and then On again.

If the OTP is activated, the main output will turn off and PRO O7P (over
temperature protection) will blink on the display. The OTP alarm is an
alarm that will auto recover when the temperature falls back into normal
bounds.

Defining the OTP Mode

To define the OTP lock:

1. Turn the 9-position mode control to the PRT position.
PrO OUP is displayed.

2. Turn the rotary Adjust/Enter control until PRO O7P is displayed.

3. Press the rotary Adjust/Enter control to display O7P ON or OFF.

4. Turn the rotary Adjust/Enter control to change to On or Off.

5. Press the rotary Adjust/Enter control.

The SCPI command (s) for these instructions are:

[:]SYSTem[<channel(s)>]:PROTection:LATCh

Resetting in Latch Mode

To reset the power supply if the OTP alarm is tripped and the OTP mode
is set to On (latching enabled), press and hold the rotary Adjust/Enter
control for approximately 3 seconds.

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel(s)>]:PROTection:CLEar
[:]SYSTem[<channel(s)>]:PROTection:LATCh

3-30 M370185-01

Using the External Shutdown Function

Using the External Shutdown Function

Use the external shutdown function to enable or disable the output of the
power supply via a logic level signal. When the external shutdown is
triggered, the power supply will display SD POL on the output voltage and
current displays. The external shutdown is useful for making adjustments
to either the load or the power supply without shutting off the power
supply or for using the power supply as part of a larger test system in
which digital or analog control is required.

Activating the External Shutdown Function

To activate the external shutdown function, use the AUX output supply
provided on the Analog Programming Connector J3. This input has a user
selectable polarity with logic low input from 0.0V to 1.2V and logic high
from 2.0V to 15V. The control signal for this input must be capable of
sinking 10mA minimum. This input is also compatible with the use of dry
contacts, where a short is logic low and an open is logic high. The input
lines of the shutdown circuit are fully optically isolated. See page C–4 for
specifications.

Once the External Shutdown has been triggered, the display will blink the
SD POL.

3

Controlling the External Shutdown Function

The external shutdown circuit accepts a voltage or dry contact control
(high or low logic level) to enable or disable the power supply output.
Make connections for the signals at the AUX Output and Isolated Analog
Programming Connector on the rear panel. (See “AUX Output and
Isolated Analog Programming (ISOL) Connector” on page 4–20 for more
information.)

To activate the shutdown function:

Connect the control signal source to the Shutdown pin (J3.1 2) on th e Aux
Output and Isolated Analog Programming Connector with the control
circuit ground connected to Isolated Ground pin (J3.6).

The External Shutdown pin is pulled high internally (normally high).
Therefore, if this feature is not used, the polarity should be set to 1 to
avoid false triggering. (See “Defining the Polarity of the External
Shutdown Signal” on page 3–32 for instructions.)

M370185-01 3-31

Local Operation

Defining the Polarity of the External Shutdown Signal

1. Turn the 9-position mode control to the PRT position or press the
rotary Adjust/Enter control if the control knob is already at the PRT
position.

PrO OUP is displayed on the output voltage display.

2. Turn the rotary Adjust/Enter control until PrO SD is displayed.

3. Press the rotary Adjust/Enter control to display SD 0 (shutdown on
logic 0) or SD1 (shutdown on logic 1).

4. Press the rotary Adjust/Enter control to commit the desired polarity
setting.

For example: If you set the shutdown logic to 1 (SD1) and apply a
logic high (greater than 1.2 Vdc) to pin J3.12 relative to pin J3.6 on
the ISOL connector, the power supply will shut down. Conversely, if
you set the shutdown logic to 0 (SD0), the power supply will only
operate when you have a logic h igh (gre ater th an 1 .2 Vd c) to pin J3.2
relative to pin J3.6.

Important:

the shutdown polarity should be set to 0 if it is not being used.

There is an internal pullup resistor inside the shutdown circuit so

The SCPI command (s) for these instructions are:

[:]OUTPut[<channel>]:POLarity

3-32 M370185-01

Interlock Function

The Interlock function can be used to wire an external shutoff switch that
can be used to enable or disable the power supply output. When the
switch is closed the power supply will operate normally. If the switch is
opened, the power supply will trigger the interlock alarm. The output will
be disabled, the display will blink In Loc, and the ALARM LED will
illuminate. This alarm will automatically clear when the switch closes
again, and the output will automatically be restored to its pre-alarm state
(either enabled or disabled). The interlock function can be enabled or
disabled using a SCPI command. Common applications include an
emergency shutoff switch or a door switch.

Connect the switch between pins J3.14 and J3.15 on the AUX Output and
Isolated Analog Programming Connector.

Defining the Interlock Mode

The Interlock mode is controlled via SCPI commands. There is no front
panel access for enabling or disabling the Interlock functionality. See
“Interlock Enable/Disable” on page 5–66.

Interlock Function

3

The SCPI command for setting the Interlock mode to On and Off is:

[:]SENSe[<channel>]:PROTection:INTerlock[:STATe]

Output Protection

The output voltage and the output current can be programmed (preset) to
automatically start at zero Volts and zero Amps upon power-up and upon
output enable. Also, each can be reprogrammed to disable the autotmatic
reset to zero.

Note: With the M10 Option, the power supply voltage output is
preset to 0 Volts.

Programming Voltage Output Preset

To Enable/Disable automatic reset to 0 Volts:

1. Turn the rotary Adjust/Enter control to PRT and press.

2. Turn again until Pr0 0U7P is displayed.

3. Press to display 0U7P U0L.

M370185-01 3-33

Local Operation

4. Turn to display U0L 0n or U0L OFF.

5. Press to commit the selected setting.

Important:

This single front panel operation affects both power on and
output enable. However, when using SCPI, there is a separate command
for each.

The SCPI command to query or enable/disable the 0 Voltage Output
Preset at power-on is:

[:]SYSTem[<channel>]:PON:VOLTage {?|ON|OFF}

The SCPI command to query or enable/disable the 0 Voltage Output
Preset upon output enable is:

[:]SYSTem[<channel>]:PON:ENAble:VOLTage {?|ON|OFF}

Programming Current Output Preset

To Enable/Disable automatic reset to 0 Amps:

1. Turn the rotary Adjust/Enter control to PRT and press.

2. Turn again until Pr0 0U7P is displayed.

3. Press to display 0U7P CUrr.

4. Turn to display CUrr 0n or Curr OFF.

5. Press to commit the selected setting.

Important:

This single front panel operation affects both power on and
output enable. However, when using SCPI, there is a separate command
for each.

The SCPI command to query or enable/disable the 0 Current Output
Preset at power-on is:

[:]SYSTem[<channel>]:PON:CURRent {?|ON|OFF}

The SCPI command to query or enable/disable the 0 Current Output
Preset upon output enable is:

[:]SYSTem[<channel>]:PON:ENAble:CURRent {?|ON|OFF}

3-34 M370185-01

Power On Status Signal

Power On Status signal indicates a fault condition in the power supply.
Power On Status signal is a TTL output signal at Pin J2.13 with reference
to COM_ISOLATED (Pin J2.2 or Pin J2.6).

During normal operation, the Power On Status signal will be high. If the
output is disabled for any reason, the Power On Status signal will go low.

The following conditions will set the Power On Status to a low level:

•AC fail

• Over Voltage protection (OVP)

• Under Voltage Protection (UVP)

• Over Current Protection (OCP)

• Over Temperature protection (OTP)

• Foldback protection

•Interlock

•Output Off

• Shutdown activated (rear panel shutdown).

• Internal hardware malfunction

•Fan failure

Hardware Malfunction Alarms

3

Hardware Malfunction Alarms

The power supply will turn off the output. An error message will be
displayed in the event that:

• OVP trips

• Voltage deviation in CV mode reaches more than ±5% from the set

1

level.

• Current deviation in CC mode reaches more than ±5% from the set

1

level.

1.These two forms of hardware malfunction are only monitored in the
corresponding APG mode.

M370185-01 3-35

Local Operation

Current Configuration Memory Settings

The power supply will save the unit settings at the time of power down.
These settings will be loaded when the power is restored to the unit or the
power supply is powered up again. Table 3-7 lists the settings that are
saved and recalled on a power cycle event.

Table 3-7

Voltage Setpoint
Current Setpoint
Voltage Output Protection
Current Output Protection
Over Voltage Protection (OVP)
Under Voltage Protection (UVP)
Over Temperature Protection (OTP)
Autostart OUTPUT ENABLE Main
Autostart OUTPUT ENABLE Aux
Foldback Mode
Foldback Delay
Shutdown Logic
Voltage Analog Programming (VAP) Mode
Voltage Analog Programming (VAP) Level
Current Analog Programming (CAP) Mode
Current Analog Programming (CAP) Level
Remote Programming Interface
Local Lock
PSU (Power Supply) Address
Data Rate (BPS)
Alarm Latches
Front Panel Timeout

Power Cycle Saved/Recalled Settings

3-36 M370185-01

User Setting Memory Locations

There are three user setting memory locations available for storing
frequently used configurations. These user setting memory locations help
to facilitate multiple users of an XTR power supply who have different
setups or when multiple loads are used that have different requirements.
Table 3-8 lists the values that are stored in each user setting memory
location.

User Setting Memory Locations

Table 3-8

Voltage Setpoint
Current Setpoint
Voltage Output Protection
Current Output Protection
Over Voltage Protection (OVP)
Over Temperature Protection (OTP)
Autostart OUTPUT ENABLE Main
Autostart OUTPUT ENABLE Aux
Foldback Mode
Foldback Delay
Shutdown Logic
Voltage Analog Programming (VAP) Mode
Voltage Analog Programming (VAP) Level
Current Analog Programming (CAP) Mode
Current Analog Programming (CAP) Level
Current Sharing Mode
Alarm Latches
Front Panel Timeout

User Accessible Saved/Recalled Settings

3

Saving User Setting Memory Locations

To save user setting memory locations:

1. Turn the 9-position mode control to the SAV position.

M370185-01 3-37

SAUE is displayed on the output voltage display with a number
indicating a preset position which is displayed on the output current
display.

Local Operation

2. Turn the rotary Adjust/Enter control to select a preset position from 1

to 3.

3. Press the rotary Adjust/Enter control.

SAuE done is displayed on the output voltage display.

4. The setting has now been saved to the selected user setting memory

location.

The SCPI command (s) for these instructions are:

*SAV <setting_location>

or

[:]SYSTem[<channel>]:SAVE <setting_location>

Recalling User Setting Memory Locations

This feature recalls settings that were previously saved.

To load user setting memory locations:

1. Turn the 9-position mode control to the RCL position.

RCL is displayed on the output voltage display with a number
indicating a preset position on the output current display.

2. Turn the rotary Adjust/Enter control to select a preset position from 1

to 3.

3. Press the rotary Adjust/Enter control.

rCL done is displayed on the output voltage display.
The settings in the selected user setting memory locations have now

been applied to the power supply.

The SCPI command (s) for these instructions are:

*RCL <setting_location>

or

[:]SYSTem[<channel>]:RECall <setting_location>

Three user setting memory locations are available and one user setting
memory location is saved automatically before AC power shutdown. This
user setting memory location will be loaded after AC power is restored.

3-38 M370185-01

Local Lockout

Local lockout is a feature that allows the front panel to be locked so that
accidental button presses are ignored. This feature is often used to lockout
the front panel when you are controlling the power supply from a remote
location. When in local lockout mode, the front panel will display LOCL
Loc whenever a button is pressed or a knob is turned.

Enabling Local Lockout

To enable local lockout:

1. Turn the 9-position mode control to the PGM position or press the
rotary Adjust/Enter control if the control knob is already at the PGM
position.

The display will show rE in the output voltage display and the
selected remote interface in the output current display.

2. Turn the rotary Adjust/Enter

3. Press the rotary Adjust/Enter control.

4. Turn the rotary Adjust/Enter control until the display shows LOCL On.

5. Press the rotary Adjust/Enter control.
Local lockout has been enabled.

control until the

Local Lockout

3

display shows LOCLLoc.

The SCPI command (s) for these instructions are:

[:]SYSTem:REMote:STATe

Disabling Local Lockout

To disable local lockout:

1. Turn the 9-position mode control to the PGM position or press the
rotary Adjust/Enter control if the control knob is already at the PGM
position.

The display will show rE in the output voltage display and the
selected remote interface in the output current display.

2. Turn the rotary Adjust/Enter control until the display shows LOCL
Off.

3. Press the rotary Adjust/Enter control.
Local lockout will be disabled after power-cycling the power supply.

The SCPI command (s) for these instructions are:

[:]SYSTem[<channel(s)>]:REMote:STATe

M370185-01 3-39

Local Operation

Resetting the Power Supply

The reset is used to clear the parameters to the factory default values.

Soft Reset The soft reset is used to set the parameters (see Table 3-9) to the default

values, but it does not reset the calibration constants

To perform a soft reset:

1. Turn the power supply to Off then On.

When the unit is powering on, 8888 8888 is displayed on the output
voltage and current displays.

2. Press the key combination of both OUTPUT ENABLE Main button
and OUTPUT ENABLE Aux button and hold continuously for 3
seconds in order to execute.

If the flash fail alarm triggers, it is also possible to reset the power
supply. The front panel should display P5U S rS.

3. Once a reset has been triggered, the output voltage display shows P5U
CLr for 1 second.

The model number will be displayed for 1 second and then return to
normal mode.

After executing a reset, the power supply’s settings are restored to the
default settings but retain the calibration data. Table 3-9 lists the default
settings.

Table 3-9

Parameter Setting

Address 1
Data rate (Kbps) 9.6
Communication mode RS-232
Vout setting 0 V
Iout setting 0 A
Output Off
AUX Out Off
Trigger Off
Ext. On/Off Polarity Negative
Auto start mode Off
AUX Auto start mode Off
OVP Maximum

3-40 M370185-01

Power Supply Default Settings

Resetting the Power Supply

Table 3-9

Parameter Setting

UVP 0 V
Foldback trigger None
Foldback delay 0.5 s
Current Share Mode Controller
Alarm Output Latches 263 (0 × 107, all latches enabled)
Alarms Mask 2047 (0 × 7FF, all enabled)
Interlock Disabled
Voltage Analog Programming Off
Voltage APG Scale 10 V
Current Analog Programming Off
Current APG Scale 10 V
Voltage Output Protection Off

Current Output Protection Off

Power Supply Default Settings

(except M10 Option: always On)

(except M10 Option: always On)

3

M370185-01 3-41

Local Operation

Using Multiple Power Supplies

WARNING: Shock hazard

There is a shock hazard at the load when using a power supply at an output of
greater than 40V or a combined output of greater than 40V. To protect personnel
against accidental contact with hazardous voltages created by a series
connection, ensure that the load, including connections, has no live parts which
are accessible. Also ensure that the insulation rating of the load wiring and
circuitry is greater than or equal to the maximum or combined output voltage of
the power supply.

CAUTION: Equipment damage

Do not connect power supplies from different manufacturers in parallel or in
series.

CAUTION: Equipment damage

The remote programming inputs are internally referenced to the power supply's
negative output. Do not connect remote programming ground lines to the power
supply's positive output.

You can operate power supplies of the same model with the outputs in
series to obtain increased load voltage or with the outputs in parallel to
obtain increased current, also called current sharing. Split supply
operation gives you two positive outputs, or a positive and a negative
output. See Figure 3-5 on page 3–43. When using multiple supplies in
series or parallel, they will not meet the single unit specifications in this
Manual.

3-42 M370185-01

Power Supply

Power Supply

Using Multiple Power Supplies

V

Common

Load

V

3

Figure 3-5

Split Supply Operation

M370185-01 3-43

Local Operation

–

–

Configuring Multiple Supplies for Series Operation

A maximum of two power supplies of the same rating can be connected in
series to increase the output voltage.

CAUTION: Equipment damage

When two power supplies are connected in series, they should be programmed to
the same output voltage to prevent damage to the lower voltage supply at short
circuit condition.

Connecting to the Load in Local Sensing Mode

Connect the negative (–) output terminal of one power supply to the
positive (+) output terminal of the next power supply. See Figure 3-6 for a
representation of series operation.

J1.2

+LS

J1.1

+S

Power Supply

J1.5

-LS

J1.2

+LS

Power Supply

J1.5

-LS

Figure 3-6

+

J1.6

-S

J1.1

+S

+

–

J1.6

-S

Series Operation

+

LOAD

3-44 M370185-01

Connecting to the Load in Remote Sensing Mode

Connect the negative (–) output terminal of one power supply to the
positive (+) output terminal of the next power supply. The more positive
supply’s positive sense line should connect to the positive terminal of the
load (or distribution point). Its return sense line should connect to the
connection between the two units at the same spot as the negative
supply’s positive sense line. The return sense line of the negative supply
should be connected to the return of the load. See Figure 3-7.

CAUTION: Equipment damage

Do not connect sense lines through relays.

Using Multiple Power Supplies

3

Figure 3-7

M370185-01 3-45

Load Connections in Remote Sensing Mode

Local Operation

Configuring Multiple Supplies for Current Sharing Operation (APG
Method)

Up to four power supplies can be connected in parallel to increase the
output current. One of the units will operate as the master unit and the
remaining units will operate as slave units controlled by the master unit.
The master unit uses the analog programming lines to set the output
voltages and currents of the slave units to match its output.

In remote digital operation, only the master unit can be programmed
remotely while the slave units that are connected remotely will only
provide voltage, current and status readback information.

In APG current sharing topologies, only the master unit can be
programmed using any of the input methods (front panel, remote digital,
or analog programming control). The slave unit(s) voltage and current
output(s) are determined by the master unit through the REF_I input to
each slave unit. The readback using any of the monitoring methods (front
panel display, user monitor lines or SCPI measure commands) of each
unit (master or slave) will provide individual unit status, not system
status.

Important:

configured as a controller. Failure to do so will result in unpredictable
operation.

Setting up the Controller Unit

Set the output voltage of the master unit to the desired voltage. Program
the current set point of the master unit to the desired load current set point
divided by the number of parallel units. During operation, the master unit
operates in Constant Voltage mode, regulating the load voltage at the
programmed output voltage. Send the Current share SCPI command or
use the following instructions to program front panel current share setup:

1. With the 9-position mode control at the PGM position, press the
rotary Adjust/Enter control.

rE is displayed on the output voltage display.

2. Turn the rotary Adjust/Enter control to select CurrShAr and press the
Adjust/Enter control.

C5hr is displayed on the output voltage display.

3. Turn the rotary Adjust/Enter control to select Con7 in the output
current display.

If current sharing is not being used, the unit must be

3-46 M370185-01

4. Press the rotary Adjust/Enter control to commit the setting.

The SCPI command (s) for these instructions are:

[[:]SOURce[<channel>]]:COMBine:CSHare[:MODE]

Setting up the Slave Units

The output voltage and current of the slave units should be programmed
to maximum value. During parallel operation, the slave units operate as
a controlled current source following the controller unit’s output current.

All slave units must be configured with the SCPI command to enable
current sharing, or use the following instructions to program front panel
current share setup:

1. With the 9-position mode control at the PGM position, press the
rotary Adjust/Enter control.

rE is displayed on the output voltage display.

2. Turn the Adjust/Enter conrol to select “CurrShAr” and press the
Adjust/Enter control.

C5hr is displayed on the output voltage display.

3. Turn the rotary Adjust/Enter control to select SlA in the output
current display.

Using Multiple Power Supplies

3

4. Press the rotary Adjust/Enter control to commit the setting.

The SCPI command (s) for these instructions are:

[[:]SOURce[<channel>]]:COMBine:CSHare[:MODE]

Important:

interface slave described in chapter 5.

The slave unit discussed here is not the same as the remote

Setting Over Voltage Protection (OVP)

The master unit’s OVP should be programmed to the desired OVP level.
The OVP of the slave units should be programmed to a higher value
than the master OVP. When the controller unit shuts down, it will
program the outputs of the slave units to zero volts. If a slave unit shuts
down, only that unit would shut down and the remaining slave units
would supply all the load current if possible.

M370185-01 3-47

Setting Foldback Protection

Foldback protection is only available on the master units as the slaves
operate in constant current mode. They should never crossover into
constant voltage mode. If foldback is triggered on the master unit, when
its output shuts down, it will program the slave unit’s output to zero
volts.

3-48

Using Multiple Power Supplies

Connecting to the Load in Local Sensing Mode (Parallel Control
Method)

Connect the power supplies in parallel to obtain a single output supply
with a higher output current set point. Set all of the outputs to the same
voltage before connecting the positive (+) and negative (–) terminals in
parallel. The total current available is the sum of the maximum currents
of each power supply.

3

Figure 3-8

M370185-01 3-49

Load Connections in Local Sensing Mode

Local Operation

Connecting to the Load in Remote Sensing Mode (Parallel Control
Method)

Figure 3-9

3-50 M370185-01

Load Connections in Remote Sensing Mode (Parallel Control Method)

Using Multiple Power Supplies

3

M370185-01 3-51

Local Operation

3-52 M370185-01

Analog

4

Programming (APG)
and Isolated Analog
Programming (ISOL)

Chapter 4, Analog Programming (APG) and Isolated
Analog Programming (ISOL), provides information and
procedures for analog and isolated analog programming of
the power supply.

Analog Programming (APG) and Isolated Analog Programming (ISOL)

Introduction

The rear panel connectors J1 and J3 provide an option to control and
monitor the output of the power supply with analog signals. Connector J1
provides a non-isolated analog interface where all signals are referenced
to the negative output terminal of the power supply. Connector J3 is an
isolated interface and also provides an isolated auxiliary voltage output to
aid analog programming.

Analog Programming (APG) of Output Voltage and Output Current

Analog programming allows control of the power supply’s output
voltage, output current or both to be controlled from analog inp ut sources.
As the programming source is varied within the configured analog
programming range (2–10
varies proportionally over its output range. For example, if you set the
programming scale to 10
programming pins, the power supply will be programmed to 50% of the
output capability for your power supply.

While analog programming mode is configured, you will not be able to
make adjustments to the set points from the front panel or through the
remote interfaces.

volts/kΩ max), the power supply’s output

V voltage source and apply 5 V to the

The front panel will display AnPr in the output current display when the
9-position mode control is turned to VOLTS or AMPS positions for the
parameter(s) that are configured to be controlled by analog programming.
If an adjustment of a parameter controlled by APG is attempted using a
SCPI command, a “-221 Settings Conflict” error will be pushed onto the
error queue.

Using analog programming requires that you make connections to the
Isolated Analog Programming Connector or Analog Programming
Connector on the rear panel of the power supply. Depending on your
model, see

4-2 M370185-01

“Rear Panel Connectors” on page 1–6 or “” on page 1–7.

Remote Programming Options

Analog Monitor Signals

There are four monitor lines for analog programming the pin name and
the related APG mode, which are listed in
provided to give analog feedback. The output from these monitor lines is
a value scaled to the Analog Programming level set for the corresponding
analog programming type. For example, the voltage monitor and isolated
voltage monitor lines are both scaled to the analog programming level
that is set in the VAP mode.

Introduction

T able 4-1. All of these lines are

Table 4-1

Related APG Mode Reference Line

Non-Isolated Voltage Analog Programming VOL_MON J1.13
Isolated Voltage Analog Programming IS_MON_VOL J3.5
Non-Isolated Current Analog Programming CUR_MON J1.14
Isolated Current Analog Programming IS_MON_CUR J3.10

Important:

supply even when the unit is not set to operate in analog programming mode.

Important:

programming modes are used for the respective voltage and current control. If
local (front panel) control is used or non-isolated APG is used, these values will
be inaccurate and should not be used for monitoring. Conversely, if isolated APG
is used, the non-isolated monitor lines will be inaccurate.

Monitor Lines

Connector

Name

Analog control monitor lines will reflect the output of the power

Isolated monitor lines are only valid when isolated analog

4

M370185-01 4-3

Analog Programming (APG) and Isolated Analog Programming (ISOL)

Auxiliary Outputs

The auxiliary outputs are an additional isolated source. The auxiliary
output has two outputs: +5
The auxiliary output operates independently of the main output. It is
enabled or disabled from the front panel by pressing the OUTPUT
ENABLE Aux button. When the Aux output is enabled, the OUTPUT
ENABLE Aux button is illuminated. Like the main output of the power
supply , the Aux also has the ability to Autostart at power up. See
Auto Start Mode (Auto Restart)” on page 3–17 and “Auxiliary Auto Start
Mode” on page 3–18 for details on controlling this feature.

Table 4-2 provides a summary of the options available for programming
output voltage and current set point using an analog source.

V output on J3.9 and a +15 V output on J3.1 1.

“Output

Table 4-2

Control of… Programming Scale

Output voltage 2–10 V Voltage source (adjustable) See page 4–10.
Current set point 2–10 V Voltage source (adjustable) See page 4–12.
Output voltage 2–10 kΩ Resistive source (adjustable) See page 4–15.
Current set point 2–10 kΩ Resistive source (adjustable) See page 4–17.

1.The resolution can be adjusted in increments of 0.1 volts.

Remote Programming Options

1

For more info…

4-4 M370185-01

Analog Programming (APG) Connector J1

The APG connector is an 18-pin connector. See Figure 4-1.
The APG connector provides access to the following functions:

• Sense control

• Analog programming and monitoring.

Introduction

+SNS
+LS

-LS

-SNS
COM

VOL_PR
CUR_PR

Figure 4-1

Table 4-3

Jumper

123

APG Connector Terminals

APG Pins and Functions J1

Jumper

4

5

67

Pin Reference Function

J1.1 +SNS Positive (+) Sense
J1.2 +LS Positive (+)

Local Sense}Jumper. Factory default condition.

8

910

11 12 13 14

15 16 17

18

REF_I

CSH

EXT_CC_CV

CUR_MON

VOL_MON

CUR_RES_PR

VOL_RES_PR

4

J1.3 –NC
J1.4 –NC
J1.5 –LS Negative (–)
J1.6 –SNS Negative (–)

J1.7 COM Analog Common Same as power supply negative sense (–SNS)
J1.8 COM Analog Common Same as power supply negative sense (–SNS)

M370185-01 4-5

Local Sense}Jumper. Factory default condition.
Sense

Analog Programming (APG) and Isolated Analog Programming (ISOL)

Table 4-3

APG Pins and Functions J1

Pin Reference Function

J1.9 VOL_PR Analog Voltage Programming Input
J1.10 CUR_PR Analog Current Programming Input
J1.11 VOL_RES_PR Voltage Resistive Programming Input
J1.12 CUR_RES_PR Current Resistive Programming Input
J1.13

VOL_MON

1

Voltage Monitor. The scale of this output is set by the APG
voltage input range selected (see Important note below).

J1.14

CUR_MON

1

Current Monitor. The scale of this output is set by the APG
current input range selected (see Important note below).

J1.15 EXT_CC_CV External CC/CV. Indicates the state of the operate mode. When

in CV mode, logic high is output and when in CC mode, logic
low is output. Logic is TTL/CMOS compatible.

J1.16 CSH Current Share. Used to hook up units for current sharing. Output

from master unit. Slave units should be left open.

J1.17 REF_I Current Reference Input. Slave input from current share output

on the master unit.

J1.18 NC

1.Important: Non-isolated monitor lines are only valid in local control, digital remote and non­isolated analog programming modes for the respective voltage and current control. If isolated
analog programming is used, the isolated monitor lines should be used as the non-isolated
monitoring lines will not accurately reflect the output state of the power supply.

4-6 M370185-01