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5.1.4
Crossbar Xk
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 Xk
No. Function
No.
Function
No.
Function
1
+ Cont. Volt. 0-230VAC 13
Digit. Input 9
25
Bus 2A
2
- Cont. Volt. 0-230VAC 14
Digit. Input 10
26
Bus 2B
3
+Contr. Volt24VDC
15
Digit. Input 11
27
Burdon1
4
-Contr. Volt24VDC
16
Digit. Input 12
28
Burdon 2
5
Digit. Input 1
17
+ ana. Nom.Value
29
Oszi Channel 1
6
Digit. Input 2
18
- ana. Nom.Value
30
Oszi Channel 2
7
Digit. Input 3
19
Analog GND
31
Diag FOC
8
Digit. Input 4
20
+ ana. actual.value
32
0V E1/E2 0-20mA
9
Digit. Input 5
21
- ana. actual.value
10
Digit. Input 6
22
Pot. free Link
11
Digit. Input 7
23
Bus 1A
12
Digit. Input 8
24
Bus 1B
5.1.5
Connection box Xk
To facilitate troubleshooting, all 56 signals
(50 from the crossbar and six from the power module) are connected to
test terminals at connection box Xk. Therefore, the signals can be interrupted manually
or the current can be measured.
