96
DS440IS
7.2.2
Point-to-point mode
The COM1 port is generally used to connect printers, a PC or a slave.
7.2.3
Optic loop mode
Besides operating in the one-by-one manual mode like COM1, the COM2 port can also function in
the OPTIC LOOP mode.
The OPTIC LOOP mode is used in a network of terminals.
The signal from RX is repeated on TX in this operating mode.
Key
1
D440IS number 1
2
D440IS number 2
3
D440IS number n<
4
Personal Computer
5
Optical fibre adapter - RS232
Figure 7.3 - Optic loop