Product category: ATE Systems
News Release from: Peak Production Equipment | Subject: TestMaster
Edited by the Electronicstalk Editorial Team on 21 October 2002
Flexibility is key
for functional tester
A functional test system supplied by the Peak Group is being used by controls manufacturer IMI Norgren to boost productivity and flexibility at its manufacturing plant in Lichfield, Staffs
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The system is being used to test intelligent pneumatic valve controllers, which are produced by IMI Norgren in a variety of configurations to link with different industrial bus interfaces. Based on Peak's ruggedised PC-based hardware and TestMaster software, it tests not only the individual solenoid channel control functions of the controllers but also the current bus status by monitoring the operation of multi-coloured LED indicators.
Bus interfaces handled by the controllers and the Peak test system include DeviceNET, CANopen, Profibus, AS-i and Norgren IMI's proprietary NorgrenBus.
The test system accesses each of these via PC-based communications cards, and monitors the LED indicator status with a built-in optical detector system.
It also measures the current flow in the solenoid which operates the pneumatic valve.
In-circuit testing is also carried out to check for open and short circuits on up to 24 pins on the controller board connector interfaces.
The testing of these connector pins uses a multiplexing technique, and the result is compared against results from a known 'golden board'.
The modular philosophy behind Peak's test systems meant that the wide mechanical and electrical variations in IMI Norgren's products could be accommodated by a number of different heads being supplied for use with the basic test fixture.
The different heads are electrically identifiable by the functional test system to provide verification of compatibility of the fixture head and the product under test before the test commences.
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