C. Digital I/O ASIC System Setup Considerations
ÛZIATECH
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Figure 1. I/O Rack Vcc and Ground Supplied Via Interface Cable
Correct Power Supply Sequence, Signal Level Matched
Power
Supply
ZT 8907
Interface Cable
24-Position
or
Custom
Application
Vcc
1Amp
24
ZT8907
Digital
16C50A
I/O
ASIC
Figure 2. I/O Rack Vcc and Ground Supplied Externally
Potential Power Supply Sequence Mismatch, Signal Level Mismatch
Power
Supply
ZT 8907
Interface Cable
External
Power
Supply
24-Position
or
Custom
Application
Vcc
24
ZT8907
Digital
16C50A
I/O
ASIC
Figure 3. Computer-Switched External Power Supply
Correct Power Supply Sequence,
Potential Signal Level Mismatch
Power
Supply
ZT 8907
Interface Cable
External
Power
Supply
Custom
Application
Vcc
1Amp
S
24
ZT8907
Digital
16C50A
I/O
ASIC