I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
26
1.6.2.
Using a 3-wire RS-232 port
There are 3 wires as following:
Connect RXD to TXD of RS-232 device
Connect TXD to RXD of RS-232 device
Connect GND to GND of RS-232 device
GND
I-7521/I-7521D
I-7522/I-7522D
I-7523/I-7523D
I-7522A/I-7522AD
I-7524/I-7524D
I-7527/I-7527D
TXD
RXD
RS-232 Device
RI
CTS
RTS
DSR
GND
DTR
TXD
RXD
DCD
Summary of Contents for I-7521
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