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.