Black Box Secure Device Servers Manual De Usuario
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1101 and 1102 Secure Device Servers
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Table 3-1. RS-232 DB9 connector pinouts.
Signal Pin
Definition
CD
1
Received Line Signal Detector
RXD 2
Received
Data
TXD 3
Transmitted
Data
DTR 4
Data
Terminal
Ready
GND 5
Signal
Ground
DSR 6
Data
Set
Ready
RTS
7
Request To Send
CTS
8
Clear To Send
RI 9 Ring
Indicator
3.3.1 Non RS-232 Serial Port Pinouts— LES1102A
Port 2 on the LES1102A can also be software selected to be an RS-485 or RS-422 port connected through the screw terminal block (pinout shown
in Table 3-2.
Table 3-2. Non RS-232 serial port pinout for the LES1102A.
1
+V DC IN
2
GND
3
RX+
4
RX-
5
TX+
6
TX-
7
+3.3V DC OUT
8
GND
Figure 3-2. Front panel of the LES1102A showing pinout connections on the left side.
RS-422 uses a full-duplex transmit on TX+/TX- pair, receive on RX+/RX- pair.
RS-485 uses half-duplex over single pair. The LES1102A supports half duplex “party-line” communications over a 2-wire RS-485 bus (D+/D-). This is
enabled by choosing the RS-485 option (instead of RS-232 or RS-422) for “Signaling Protocol” from the “Serial Port: Configuration” link on the