5
2.3 Serial Connection The model of the ADAM-4562 has one RS-232 DTE connector for connecting serial
ports on the bottom of module.
Note: In USB v1.1 standard, if you have used the COM3, COM4…..COMn of host PC.
When you plug ADAM-4562 in the host PC, theCOM port will be COMn+1.
Figure 2-1 RS-232 Terminal (DTE) connections
Grounding is one of the most important issues for our system. Just like Frame
Ground of the computer, this signal offers a reference point of the electronic circuit
inside the computer. If we want to communicate with this computer, both Signal
Ground and Frame Ground should be connected to make a reference point of
each other’s electronic circuit. Generally speaking, it is necessary to install an
individual grounding bar for each system, such as computer networks, power
systems, telecommunication networks, etc. Those individual grounding bars not
only provide the individual reference point, but also make the earth a our ground!
Jumper JP1 allows choosing the ground setting. If jumpers JP1 is set as following, the
pins 1 & 2 are closed and it means the ground is connected to the shell of DB9 connector.
On the other words, the pins 2 & 3 are closed and it means the ground is floating
ground is connected to ground is floating
the shell of DB9 connector
(default setting)