AUMA PV1644, Руководство по эксплуатации

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5.1.6 Crossbar Xa
The crossbar is controlled via an USB module within the control computer.
The code from the USB module is transformed into an I²C bus signal.
This signal controls the individual relays on the relay board. Control is performed in
series.
The crossbar may apply 32 different signals to a test pin.
Up to 64 different pins can be switched, whereas 56 pins have been assigned different
functions.
The test bench uses the crossbar to communicate with the test specimen.
Assigment list Xa
No. Function No. Function No. Function
1 DSR NC Contact 13 NTC 2.1 25 Spare
2 DSR NO Contact 14 NTC 2.2 26 Spare
3 DÖL NC Contact 15 Pot. Wiper(0-5V) 27 Spare
4 DÖL NO Contact 16 0V analoque 28 Spare
5 WSR NC Contact 17 DVM +Input 29 Spare
6 WSR NO Contact 18 DVM - Input 30 Spare
7 WÖL NC Contact 19 Output 0-20mA + 31 Spare
8 WÖL No Contact 20 Output 0-20mA - 32 Spare
9 Blinker Contact 21 Bus A
10 Thermo Contact 22 Bus B
11 NTC 1.1 23 + 24VDC
12 NTC 1.2 24 0 VDC
Crossbar Xa is used for simulating the characteristics of any actuator
For test specimen with MWG, one MWG for AC .1 and AC .2 each can be connected
instead of limit and torque switches.
5.1.7 Connection box Xa
To facilitate troubleshooting, all 56 signals
(50 from the crossbar and six from the power module) are connected to
test terminals at connection box Xa. Therefore, the signals can be interrupted manually
or the current can be measured.
5.1.8 Measuring and control module, load/ DVM/oscilloscope
All signals to be measured are reduced to standardised signals within the hardware of
the test bench and supplied to Beckhof measuring technology.
The signals are 0 – 10 V DC and 0 – 20mA.
The Beckhoff module are connected via Ethernet to the control computer.
The measured results are evaluated within the software of the overall system.