Pro-face GP-3500 Series Replacement Manualbook page 43

Important
If the homemade COM 2 cable diagram for GP-3500 series is used for
GP-4501T/TW with a COM port conversion adapter (CA3-ADPCOM-01), no
operation is guaranteed.
It's recommended to get a new cable diagram prepared for GP-4501T/TW. For
cable diagrams, see GP-Pro EX Device/PLC Connection Manual.
（http://www.pro-face.com/otasuke/files/manual/gpproex/new/device/index.ht
m）
・ When both the COM1 port and the COM2 port have the RS-422/485 setting, only
the COM2 port can be used for RS-422/485 connection after replacement with
GP4000 series.
Using a USB/RS-422/485 Conversion Adapter may allow you to use GP4000
series' USB interface as RS-422/485 serial interface for connection.
For more information, please refer to USB/RS-422/485 Conversion Adapter
Installation Guide.
(http://www.pro-face.com/otasuke/download/manual/cgi/manual.cgi?mode=33
&cat=3)
Important
The connected devices/PLC which can connect to the serial interface side of
USB/RS-422/485 Conversion Adapter are limited. For details, see
USB/RS-422/485 Conversion Adapter Connection Guide
(http://www.pro-face.com/otasuke/files/manual/gpproex/new/device/data/co
m_usc.pdf)
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