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Part Names and Functions
RS-232C type, RS-422/485 type
A
C
D
B
E
Rear (RS-422/485 type )
Right side
RS-485 (isolation) type
A
C
D
B
Right side
Ethernet type
A
C
D
F
Right side
(A) Power Connector
(B) Serial Interface (COM1)
(C) USB (Type A) Interface (USB1)
(D) USB (mini B) Interface (USB2)
(E) DIP Switch (SW1)
Only on RS-422/485 type.
(F) Ethernet Interface
The Ethernet transmission interface (10BASE-
T/100BASE-TX). An RJ-45 type modular jack
connector (8-pole) is used.
LED
Status
Green ON Data transmission available
LINK
Green OFF
Green ON
ACT
Green OFF No data transmission
Rear
ACT LED
LINK LED
Rear
Indicates
No connection or subse-
quent transmission failure
Data transmission is
occurring.
External Interfaces
• For instructions on how to connect to other
devices, always refer to the "GP-Pro EX Device/
PLC Connection Manual".
1.
Serial Interface
• For detailed information on pins, refer to the GP-
4100 Series Hardware Manual.
• The serial interface of the RS-232C and RS-422/
485 types is not isolated. Always connect pin #5
SG (Signal Ground) to the connected device,
especially if the connected device is also not
isolated. Failure to do so may damage the RS-
232C/RS-422/RS-485 circuit.
• An SG (Signal Ground) and FG (Frame Ground)
are connected internally in the RS-232C and RS-
422/485 types. When connecting an external
device to the GP using the SG terminal, be sure
to check that no short-circuit loop is created when
you setup the system.
RS-232C and RS-422/485 Types
Included COM I/F connector
(9-pin, 2-piece terminal block)
RS-232C type
Label
Signal Name
CI
CI(RI)
CD
CD
CS
CS(CTS)
RS
RS(RTS)
SG
SG
DR
DR(DSR)
ER
ER(DTR)
RD
RD(RXD)
SD
SD(TXD)
• A termination resistor can be set using the DIP
Switch (4-bit) on the rear of the RS-422/485 type.
Factory default settings are all set to "OFF" (no
termination resistor). Check the termination
resistor required for connection to the connected
device (PLC) and install if necessary. For detailed
information, refer to the GP-Pro EX Device/PLC
Connection Manual.
2
RS-422/485 type
Label
Signal Name
CSB
CSB
CSA
CSA
ERB
ERB
ERA
ERA
SG
SG
RDB
RDB
RDA
RDA
SDB
SDB
SDA
SDA
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