8
The monitoring function measures the potential across these two terminals and the system will
indicate a Power alarm when it is below 40Vdc.
• Remote Power Off
This optional connection is used to control power to the module from a remote location. Applying a
voltage between 5VDC and 200VDC to this input disables the DC output.
• Ports 0 and 1
Port 0 is used for low level communications to the CPU board. It is used only when updating the
Linux file system or when performing advanced troubleshooting.
The Port 1 connection is not used.
• USB
This connection is not used.
• ETH0 / ETH1
These CAT5 connections are used for communication between the module and the Station-Master
computer.
• ETH2 / ETH3
These optional fiberoptic LC type connections are used for communication between the module
and the Station-Master computer.
• SYNC OUT
This connection provides a synthesized un-modulated IRIG signal.
• IRIG IN
These two BNC connections are electrically paralleled and act as an input to the module. They also
allow the IRIG signal to be daisy-chain connected between modules. The module automatically
detects whether the input is modulated or un-modulated.
• IRIG IN LEDs
The lower blue LED blinks to indicate IRIG activity. The upper blue LED blinks at one pulse per
second (1PPS) when the M9000 module is synced to the IRIG input.
• Analog Inputs (AI)
These inputs accept AC or DC inputs. There are four input terminals labeled C, I, V2, and V1.
These inputs are used as follows:
o V1:
This terminal is used for voltage inputs with full scale range from 41Vrms to 400Vrms.
o V2:
This terminal is used for voltage inputs with full scale range from 1.5Vrms to 40Vrms.
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