Proface GP4100 - 3.4 Compact HMIs" Manual de usuario descargar pdf (Pagina 35)

GP-4100 Series Hardware Manual

3-6

3.1.3 Serial Interface

 RS-232C and RS-422/485 Types (GP4105/GP4106)

Included COM I/F connector

(9-pin, 2-piece terminal block)

• For instructions on how to connect to other devices, always refer to the “GP-Pro EX

Device/PLC Connection Manual”.

• The serial interface of the RS-232C and RS-422/485 types is not isolated. Always

connect the SG (Signal Ground) of the GP unit 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 type RS-422/485 type

Label

Signal

Name

Direction Meaning Label

Signal

Name

Direction Meaning

CI CI(RI) Input

Called status

display

CSB CSB Input

Send

Possible B (-)

CD CD Input Carrier Detect CSA CSA Input

Send

Possible A (+)

CS CS(CTS) Input

Send

Possible

ERB ERB Output

Data Terminal

Ready B (-)

RS RS(RTS) Output

Request to

Send

ERA ERA Output

Data Terminal

Ready A (+)

SG SG –

Signal

Ground

SG SG –

Signal

Ground

DR DR(DSR) Input

Data Set

Ready

RDB RDB Input

Receive Data

B (-)

ER ER(DTR) Output

Data Terminal

Ready

RDA RDA Input

Receive Data

A (+)

RD RD(RXD) Input Receive Data SDB SDB Output

Send Data B

(-)

SD SD(TXD) Output Send Data SDA SDA Output

Send Data A

(+)

• A terminating resistor can be inserted using the DIP Switch (4-bit) on the rear of the RS-422/485

type. Factory default settings are all set to “OFF” (no terminating resistor). Check the terminating

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.

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Proface GP4100 - 3.4 Compact HMIs" Manual de usuario Pagina 35

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