3. Installation
40
The interface can be connected in a communication network through a hub or switch, or straight to
the communication equipment. In this last case, due to Hadron Xtorm CPUs Auto Crossover feature,
there is no need for a crossover network cable, the one used to connect two PCs point to point via
Ethernet port.
It is important to stress that a network cable is understood as a pair of RJ45 male connectors
connected by a UTP or ScTP cable, category 5 whether straight connecting or crossover. It is used to
communicate two devices through the Ethernet port.
Usually, these cables have a connection lock that guarantees a perfect connection between the
interface female connector and the cable male connector. At the moment of the installation, the male
connector must be inserted in the module female connector until a click is heard, assuring the lock
action. To disconnect the cable from the module, the lock lever must be used to unlock one from the
other.
Serial Network Connection (COM 1)
ATTENTION:
For a correct and safe installation of COM 1 serial network, please check the chapter Electrical
Safety first.
The COM 1 non-isolated communication interface allows the connection with networks RS-232C or
RS-485. In the following sections, the Hadron Xtorm CPU DB9 female connector is presented with
its identification and signals description.
Figure 3-22. Hadron Xtorm CPU DB9 Female Connector
Pin
Signal
Interface
Description
1
DCD
RS-232C
Data Carrier Detect
2
TXD
RS-232C
Data transmission
3
RXD
RS-232C
Data reception
4
D-
RS-485
Data transmission/reception, negative
5
GND
RS-232C
RS-485
RS-232C: Ground
RS-485: Negative reference for external termination
6
D+
RS-485
Data transmission/reception, positive
7
CTS
RS-232C
Clear to Send
8
RTS
RS-232C
Request to Send
9
+5V
RS-485
Positive reference for external termination
Table 3-8. Hadron Xtorm CPU DB9 Female Connector Pinout