Siemens 9700, Руководство по установке, Страница: 29 / 45

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As noted on the graphic on the previous page, only slots 8 through 14
support analog input devices, thereby limiting the maximum number of
these devices to seven per board. Analog Output devices can populate both
slot groups on the expansion board, so a maximum of 15 of these devices
can be used per board.
If Expansion Board A is used without a separate power supply, only six
analog devices can be used in total, regardless of direction restrictions. The
following table summarizes the restrictions on analog I/O devices.
Max # of
Analog
Inputs
Max # of
Analog
Outputs
Max # of
Analog
Devices
Possible Maximum
Configurations
Board A WITHOUT Optional
Power Supply (default
configuration) 6 6 6 Any combination up to 6 total
Board A WITH Optional Power
Supply 7 15 15 Board full
Board A WITHOUT Optional
Power Supply (default
configuration) + Board B 13 21 21 A: 6 AI; B: 7 AI, 8 AO
A: 6 AO; B: 7 AI, 8 AO
A: 6 AO; B: 15 AO
A: 6 AI; B: 15 AO
Board A WITH Optional Power
Board B 14 30 30 Both boards full
I/O Device Connections
Expansion boards provide captured-wire type terminal strips for connection
to the individual I/O devices. Use a wire size that is appropriate for your
application and complies with local electrical codes. Assignment and
scaling for each device is programmable via the Analog Input, Analog
Output, Digital Input and Digital Output modules.
2
38)
All digital output devices
supplied by Siemens Energy
& Automation are asserted
low.
For detailed information
about the specifications of
each I/O device option, refer
to the
9700 Power Meter
User’s Guide.