Omicron CMA 56 User manual

CMA 56
H ARDWARE Reference Manual

OMICRON Test Universe
2
Article number VESD0010 - manual version: CMA56.AE.6
© OMICRON electronics 2000. All rights reserved.
The product information, specifications, and all technical data contained within this manual are not
contractually binding. OMICRON reserves the right to make technical changes without announcement.
OMICRON electronics is not to be held liable for statements and declarations given in this manual. The
user is responsible for every application described in this manual. OMICRON electronics explicitly
exonerates itself from all liability for mistakes in this manual. Copying or reproducing this manual,
wholly or in part, is not permitted without the expressed written consent of OMICRON electronics.

Safety Instructions
3
Safety Instructions
ATTENTION: Before starting up the CMA 56, carefully read the following
safety instructions.
The system must not be put into operation without full knowledge of this
information!
The CMA 56 may only be operated by trained personnel on the company
premises.

Current amplifier CMA 56
4
For your safety
• Operate the CMA 56 only with mains supplies with a
protective grounding!
• When connecting to the 6mm socket use only test leads with 6mm
connectors and plastic jacketing. Always push the plug in as far as it will
go. Recommendation: use supplied 6mm plugs.
• With regard to the cross section and length of the test lead, take note to
keep the impedance of the leads at a minimum.
Recommendation: use test leads with a minimum cross section of
5 mm² and maximum length of 2 m.
• Do not leave any test leads exposed; always disconnect leads at the
CMA 56 first!
• The CMA hardware and the CMC hardware should only be turned on or
off (by the switch on the front panel), if no test device is connected.
• When connecting and disconnecting the test object make sure that the
amplifier is not activated in the software (if the switch in the control
software is "On", another automatic sequence will run, a program
sequence or a transient output is active, or other signals are connected
to the input on the rear panel of the CMA 56 ("Ampl. in")).
• Attention: if the CMA 56 is connected to "Gen. out 1-6" (CMC 56 with s/n
<DExxxx: "ext. Ampl.") of a CMC 56 test device the internal current
amplifiers of the CMC 56 also supply currents to the corresponding
outputs of the CMC 56.

Safety Instructions
5
• Use correct fuse only: T10AH 250V.
• Do not insert conductive parts (screwdrivers etc.) into the sockets.
• Do not operate in a wet or humid environment (condensation).
• Do not operate if an explosion hazard exists.
• Do not operate if you suspect that a hardware fault exists. In this case,
please contact OMICRON electronics.
• Take note of the important instructions for proper handling of the
CMA 156 before starting it up
(page 10).
The device may only be opened at the manufacturer's factory - if
irregularities occur, please send it to us. Voltages of up to 500 V will
occur inside the unit! If the unit is opened, warranty claims will become
void.
If the mains fuse must be replaced (back panel of the device):
First disconnect the mains plug of the CMC test device!
Unscrew the little plastic tile and change the fuse.
Fuse: T10AH 250V.

Current amplifier CMA 56
6
Table of Contents
SAFETY INSTRUCTIONS ................................................................................................................................3
TABLE OF CONTENTS ....................................................................................................................................6
1INTRODUCTION .......................................................................................................................................8
2START-UP ...................................................................................................................................................9
2.1 SYSTEM COMPONENTS ...........................................................................................................................9
2.2 IMPORTANT INSTRUCTIONS ..................................................................................................................10
2.3 SYSTEM START.....................................................................................................................................12
2.4 INSTRUCTIONS FOR CONTROL OF AMPLIFIERS THROUGH THE CMC.....................................................16
3DESIGN AND OPERATION ...................................................................................................................20
3.1 MODULES .............................................................................................................................................20
3.1.1 Hardware Test .............................................................................................................................23
3.1.2 Temperature Monitoring..............................................................................................................23
4CONNECTIONS AND INTERFACES....................................................................................................24
4.1 CONNECTORS ON THE FRONT PANEL ...................................................................................................24
4.1.1 6mm Connector............................................................................................................................25
4.2 REAR VIEW...........................................................................................................................................28
4.2.1 Mains Fuse...................................................................................................................................28
4.2.2 Interface to the CMC Test Device................................................................................................29
5INCREASING THE OUTPUT POWER.................................................................................................34
5.1 PARALLEL CONNECTION OF MORE CMAS............................................................................................34
5.2 SINGLE PHASE OPERATION SERIES CIRCUIT 1,2 (L-L)..........................................................................36
5.3 SINGLE PHASE OPERATION PARALLEL CONNECTION 1+2+3 ................................................................37
6STATUS MESSAGES...............................................................................................................................38
6.1 OVERLOAD .......................................................................................................................................38
7TECHNICAL DATA.................................................................................................................................39
7.1 MAINS SUPPLY .....................................................................................................................................39
7.2 OUTPUTS CURRENT 1, 2, 3....................................................................................................................40
7.3 INPUTS "AMPL.IN" ...............................................................................................................................42
7.4 AMBIENT CONDITIONS..........................................................................................................................43
7.4.1 Climate.........................................................................................................................................43
7.4.2 Shock and Vibration.....................................................................................................................43
7.4.3 Electromagnetic Compatibility (EMC) ........................................................................................43
7.5 SAFETY.................................................................................................................................................44
7.6 MECHANICAL DATA .............................................................................................................................44

Table of Contents
7
8APPENDIX.................................................................................................................................................45
8.1 ORDERING INFORMATION.....................................................................................................................45
8.2 MANUFACTURER CONTACT INFORMATION...........................................................................................48
9INDEX ........................................................................................................................................................49

Current amplifier CMA 56
8
1 Introduction
The CMA 56 can be controlled from the CMC test device. The current amplifier
is housed in the same compact casing as the CMC 56 test device and supplies
3 50A.
Control is effected via an input socket on the back of the device by means of
analog signals from the CMC test device. Thus, control of the overall system
by means of the easy to use software installed on the PC is retained.
Using the CMA 56 auxiliary amplifier, the OMICRON test system is also able
to test relays having higher requirements in terms of output power and
currents, so that a wider range of test objects can be tested.

Start-Up
9
2 Start-Up
2.1 System Components
Prior to the start-up please verify that all components have been delivered:
o CMA 56 (amplifier)
o CMA 56 User’s manual
o Accessories:
• Mains cable
• Connection cable CMA 56 CMC test device (l=1 m)
• optional: Connecting cable CMA 56 CMC test device for older CMC
56 test devices.
• 4 connection cables CMA Test object:
(l=1m, =10mm, black, one end open, one end with a 6mm plug)
• Mains fuse: T10AH 250V
• Carrying bag

Current amplifier CMA 56
10
2.2 Important Instructions
Please take note of the following instructions for proper handling of the
CMA 56 current amplifier:
• Note the safety instructions!
• Operate the CMA 156 only with mains supplies with a
protective grounding!
• Operate the CMA 56 only with a CMC for DOS software version > 2.45.
• The CMA hardware and the CMC hardware should only be turned on or
off (by the switch on the front panel), if no test device is connected.
• When connecting and disconnecting the test object make sure that the
amplifier is not activated in the software (if the switch in the control
software is "On", another automatic sequence will run, a program
sequence or a transient output is active, or other signals are connected
to the input on the rear panel of the CMA 56 ("Ampl. in")).
• When the CMA 56 is used, make sure that an unobstructed air flow from
the ventilation slots on the base panel to those on the rear panel is
possible.

Start-Up
11
• For CMC 56 test devices with serial-no < DAxxxx:
If the CMC test system is configured for its internal amplifiers:
Do not connect the CMA 56 (with connected test object) to the CMC 56
or leave it connected!
The control signals are always present at the Lemo connector at the
rear of the CMC 56. When the internal amplifiers are configured, these
signals are not calibrated and are therefore invalid.
(For serial-no DAxxxx, the signals at the rear connector of the CMC 56
are suppressed if the internal amplifiers are used.)
• For the position of the sliding switch on the rear panel of the device see
the instructions in section 4.2.2.
• Please check that your OMICRON software shows the name and serial
number of the CMA 56
(e.g. CMA 56 AJ123N).
Instructions:
If the amplifier is connected to the CMC test device through the interface
"Gen. out 7-12", then the CMC reads this, and all other information
about the amplifier, automatically through this interface.
For older test devices this interface is not standard, only the "Gen. Out
1-6" (or "ext. Ampl.") interface. If the amplifier is connected to this
interface, then the information about the amplifier must be read from an
AMP-file. The AMP-file defines the most important parameters of an
amplifier (name, current or voltage amplifier, amplification factor, etc.)
and is described in Chapter 3 of the CMC DOS Software Handbook.

Current amplifier CMA 56
12
2.3 System Start
The following instructions can be followed step by step if the PC is properly
installed and set up.
For CMC for DOS software versions < 2.45:
First install a software version 2.45.
The CMA 56 can only be operated with a CMC for DOS software version
2.45 or higher.
The following procedure should be followed for interconnecting the system
components:
1. Connect the CMC test device and the PC by means of the 25-pin
connecting cable.
2. Connect the CMA 56 and the CMC test device by means of the supplied
connecting cable.1
• CMA 56: socket "Ampl. in." at the back panel.
• CMC test device: Socket "Gen. out 1-6"
(optional: "Gen. out 7-12") on the back panel.2
3. Connect CMA 56, CMC test device and PC to the mains supply (cable
supplied).
1The supplied cable has the required electromagnetic compatibility.
2For CMC 56 test devices with serial no less DExxxx: socket “ext. Ampl.“ on the back panel.

Start-Up
13
4. Turn all devices ON.
For CMC 56 test devices < DExxxx:
always turn the CMC 56 test device ON before connecting the test
object (power-ON peak)!
CMA 56:
When the CMA 56 is started, an automatic hardware test is carried out;
only after this self-test has been passed, the device turns itself ON. In
case of malfunction, a new attempt is made every 8 sec.
Notice: Steps 5 –7 are not applicable from CMC for DOS V2.8 or
OMICRON Windows software, because in this case the amplifier
configuration will be done automatically
(exception: CMC56 without Gen. Out 7-12 output).
5. After the PC has booted, copy the file xxxxxx.AMP supplied on disc to
your CMC directory.
Example: C:\CMC>copy a:AB123Z.AMP
This AMP-file is configured for your CMA.
Delete the CMA standard file CMA.AMP.
Example: C:\CMC>del CMA.AMP).
6. The program is started by typing:
CMC [] Program start.
When the program has completed initialization, you are in the main
menu.

Current amplifier CMA 56
14
7. Configuring the CMA 56 as external amplifier for the CMC test device:
When the CMC test device is started up, the internal current amplifiers
are always considered to be the active current amplifiers. To control the
CMA 56 as amplifier, the device must be specified as the active
amplifier in the CONFIGURATION menu.
a) Select menu item Configuration in the main menu and enter the
CONFIGURATION menu.
b) Select menu item I-amplifier to enter the selection list of the
available current amplifiers and select
CMA 56 xxxxxx.
c) Return to the main menu via menu item Quit.
The following message will now appear:
Ext. amplifier: I: CMA 56 xxxxxx.
Now the CMA 56 is configured as an external amplifier for the CMC test
device.

Start-Up
15
8. Connecting a test object
Control
section
supplied
connection cable
CMC CMA 56
CMC Test Device
CMA 56
Voltage
amplifier
3 x V over 4 cables
with 4mm plug measurement
lead
3 x I over 4 cables
with 6mm plug Test
Object
Measurement
section
3
Figure 1 Connecting principle CMA 56, CMC test device and test object
• Connect the current rotary system of the CMA 56 to the test object. This
may be effected via the individual outputs (1, 2, 3, N).
• If necessary, connect the voltage outputs of the CMC test device to the
test object via four cables with 4mm connectors (these are supplied by
the user).
• Connect the measuring section of the CMC test device to the test object
either via cables with 4mm connectors or via the 20-pin measurement
combination connector at the front panel of the CMC test device.
This completes the startup procedure.

Current amplifier CMA 56
16
2.4 Instructions for Control of Amplifiers through
the CMC
If your CMC has a "Gen. Out 7-12" Interface:
If your amplifier is connected to this interface it will be automatically identified
and offered as an option by the control software used, since communication is
possible over this interface. (Supported by CMC for DOS since version 2.70.)
This interface is standard on all CMC 156 test devices and can be added to
CMC 56 test devices from serial number DAxxxx. See "Ordering Information"
page 45.
If your CMC has a "Gen. Out 1-6" interface:
There is no communication between the CMC and the amplifier, so the
amplifier must be defined by an AMP-file.
If you use a CMC for DOS software version < 2.7:
There is no communication between the CMC and the amplifier, so the
amplifier must be defined by an AMP-file.
Significance of the sliding switches:
In the case of the amplifiers being controlled from the CMC for DOS software,
the sliding switches indicate whether the current (Position II) or the voltage
system (Position I) is to be amplified.
In the case of control by a CM Engine based software (all OMICRON Windows
programs are based on CM Engine) the setting of these sliding switches is
ignored.

Start-Up
17
6 x I in the CMC for DOS software:
The representation of 2 current systems in the CMC for DOS software is not
supported at the time of printing of this manual - the software only displays one
current and one voltage system. If 6 currents are to be controlled via the CMC
test device, one of the two groups must be operated with the voltage rotary
system of the CMC for DOS software. For this purpose, the appropriate AMP
file must be set in the CMC for DOS software via the menu items
Configuration and V-Amplifier. In the AMP file, enter Voltage for TYPE, 50 for
MAX and 10 for AMPLF.
The sliding-switch of the group to be controlled with the voltage system of the
CMC for DOS software must be set to position I. For this group, volts will be
displayed in the CMC for DOS software instead of amperes. (See AMPLIFIER
10 in the following example, with the instruction Sw.:I, that is sliding switch set
to position I.)
If you define your amplifiers with an AMP-file:
An external amplifier can be defined for the CMC by an AMP-file (for older
CMC 56s this is the only possibility).
An AMP-file with the same name:
If an amplifier definition in an AMP-file has the same name and serial number
as one which has been automatically identified through the "Gen. Out 7-12"
interface, then the information from the AMP-file will be ignored by the control
software.

Current amplifier CMA 56
18
Example of an AMP-file:
The following example shows an excerpt from a standard AMP-file which
would be used with the CMC for DOS software.
(An explanation of the format of the AMP-file may be found in Chapter 3 of the
CMC for DOS Software Handbook.)
BEGIN AMPLIFIER9
NAME CMA56 50A Sw. :II
SERNO
TYPE CURRENT
MAX 50
AMPLF 10
PHOFFS 1.07, 1.07, 1.07,50
END AMPLIFIER9
BEGIN AMPLIFIER10
NAME CMA56 50A Sw. :I (6xI)
SERNO
TYPE VOLTAGE
MAX 50
AMPLF 10
PHOFFS 1.07, 1.07, 1.07,50
END AMPLIFIER10
BEGIN AMPLIFIER11
NAME CMA56 CT5:1 10A Sw. :II
SERNO
TYPE CURRENT
MAX 10
AMPLF 2
PHOFFS 1.07, 1.07, 1.07,50
END AMPLIFIER11

Start-Up
19
BEGIN AMPLIFIER12
NAME CMA56 4x// 200A Sw. :II
SERNO
TYPE CURRENT
MAX 200
AMPLF 40
PHOFFS 1.07, 1.07, 1.07,50
END AMPLIFIER12

Current amplifier CMA 56
20
3 Design and Operation
3.1 Modules
The amplifier of the CMA 56 current amplifier is isolated from its controller
(CMC test device) via an isolation amplifier. This isolation amplifier passes the
received signals to a module for signal processing.
The corrected signals (by signal processing) are then passed to the outputs
1-3 at the front panel via the three-phase amplifiers.
A module for self-testing and monitoring carries a hardware test out when it is
switched ON and continuously detects the internal temperature of the
amplifier. This facility automatically switches the amplifier OFF in the case of
overheating.
Furthermore, this module is used to detect an overburden condition or
overcurrent at the outputs of the CMA 56.
The information about the current operating state of the CMA 56 is displayed
via the LED display on the front panel.
A communication interface is used to communicate with the controlling CMC.