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Chapter 5: The SmartPath EMS Platform
The above pin assignments show a DTE configuration for a DB9 connector complying with the RS-232 standard. Because this is a
console port, only Pins 2, 3, and 5 need to be used.
The serial connection settings are as follows:
• Bits per second: 9600
• Data bits: 8
• Parity: none
• Stop bits: 1
• Flow control: none
5.3 Status LEDs
The two status LEDs on the front of the SmartPath EMS indicate various states of activity through their color (dark, green, amber)
and illumination patterns (steady glow or blinking). The meanings of the various color and illumination patterns for each LED are
shown in Figure 5-5.
System Power
Dark: No power
Steady illumination: Powered on
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1 2 3
6
Figure 5-4. View of the console port on the SmartPath EMS.
Table 5-3. RS-232 standard pin assignments.
Pin
Signal
1
DCD (Data Carrier Detect)
2
RXD (Received Data)
3
TXD (Transmitted Data)
4
DTR (Data Terminal Ready)
5
Ground
6
DSR (Data Set Ready)
7
RTS (Request to Send)
8
CTS (Clear to Send)
9
RI (Ring Indicator)
Figure 5-5. Status LEDs.
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4
5
7 8
9
Direction
Not used
Input
Output
Not used
Ground
Not used
Not used
Not used
Not used
Hard Disk Drive
Dark: Idle
Blinking: Active
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