©
National Instruments Corp.
11
NI 9870 Operating Instructions
NI 9870 Hardware Overview
The NI 9870 has four full-featured, independent RS232 DTE ports
that are isolated from the other modules in the system. Each port is
fully compatible with the ANSI/EIA/TIA-232 standard.
Sleep Mode (CompactRIO Only)
You can enable sleep mode for the CompactRIO system in
software. In sleep mode, the system consumes less power and may
dissipate less heat. Typically, when a system is in sleep mode, you
cannot communicate with the modules. Refer to the
Specifications
section for more information about power consumption and
thermal dissipation.
Specifications
The following specifications are typical for the range –40 to 70 °C
unless otherwise noted.
Maximum baud rate.......................... 921.6 kbps
Maximum cable length ..................... 250 pF equivalent
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