User Manual

3.2 Addressable RS-232 Protocol Converter

7521/2/2A/3/4/7 Series Hardware User’s Manual, Ver. 1.5 Sep/2002, 7Mh-001-15 -----66

Applications:

7520

Host PC

RS-232

Device-3

RS-232

Device-2

RS-232

Device-1

7523 or

7523D

RS-232

Device-n+2

RS-232

Device-n+1

RS-485

7523 or

7523D

RS-232

Device-n

 4521 replacement & enhancement

 Multiple RS-232 devices networking

The key points are given as following:

 Connect RS-232 devices to COM1/3/4 of 7523/7523D

 Connect COM2 of 7523/7523D to RS-485 network

 7523/7523D communicates to its local RS-232 devices & stores data. Host

PC communicates to every 7523/7523D for reading data from these RS-232

devices.