I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
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6.1.3
Connecting a single I-7522 to a single HP34401A
The diagram below shows how to connect a single PC to a remote
HP34401A on an RS-485 network. The I-7520 module is used to
convert the RS-232 signal from PC to an RS-485 signal. The I-7522
module is used as an “Addressable RS-232 converter” for the
HP34401A since there is no address setting in the HP34401A.
HP34401A (RS-232)
I-7520
I-7522
RS-232
RS-485
Host PC
HP34401A
RS-232 port
9
8
7
6
5
4
3
2
1
RxD
TxD
GND
DSR
7522
RS-485D+
RS-485D-
GND
24V
Summary of Contents for I-7521
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