QVS Interface Converter IC-485S - Manual (Page 6)

IC-485S/IC-485SI
3 OPERATION
OPERATION
The IC-485S & IC-485SI supports 4 kinds of
functions in 6 kinds of configurations. They are
1. Point-to-Point
Point-to-Point configuration means two devices
which locate at two different places can be linked
together to communicate through a couple of IC-485
devices.
1.1 Point-to-Paint/4-Wire Full Duplex( Fig. 3- 1 )
1.2 Point-to-Pointi2-Wire Half Duplex( Fig. 3-2 )
2. Multidrop
Multidrop configuration means that more than
two devices can be linked all together to communi-
cate one another through many IC-485 devices. In
this configuration, one of the IC-485 devices will be
connected to a master device and the rest of IC-485
devices will be connected to many other slaver de-
vices.
2.1 Multidrop/4-Wire Full Duplex( Fig. 3-3 )
2.2 Multidrop/2-Wire Half Duplex( Fig. 3-4 )
3. Simplex/Transmit, Receive Only( Fig. 3-5 )
6 User’s Manual
OPERATION IC-485S/IC-485SI
Simplex configuration means that more than two
devices can be linked all together to communicate
through many IC-485 devices. Its configuration is
like the Multidrop’s, but the master device can talk
only a n d the slaver devices can listen only.
4. M o n i t o r Mode( Fig. 3-6 ) (for IC-485S only)
Monitor configuration means a IC-485s device
c a n be wir e d to the lines of RS-485 or RS-422 devices
to monitor the line signals. In this configuration the
IC-485S will change the function of T+ and T- to
P‘ r espectively
Before operating, user must complete the instal-
lation a c c o r d i n g to the procedure mentioned in Sec-
tion 2- 1
Once the installation had been done, the device
should operate as the setting function.