QVS IC-485SI User Manual

IC-485S/IC-485SI

OPERATION

The IC-485S & IC-485SI supports 4 kinds of

functions in 6 kinds of configurations. They are

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 )

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. 

 Fig. 3-5 )

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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

 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.