Serial interfaces (com1) – Proface LT3300 - 5.7 All-in-One HMI" User Manual
Page 49
LT3000 Series Hardware Manual
2-22
Serial Interfaces (COM1)
This interface is used to connect an RS232C/RS422/RS485 *
1
cable. D-sub 9-pin plug connector is used.
<LT unit side>
<Cable side>
In the case of RS232C
In the case of RS422C/RS485
*1
Communication method is switched via software.
*2
The RI/VCC selection for Pin #9 is switched via software. The VCC output is not protected against
overcurrent. To prevent damage or a unit malfunction, use only the rated current.
LT Connector
XM2C-0942-502LX <OMRON Co.>
Interfit Bracket
#4-40 (UNC)
Recommended Cable Connector
XM2D-0901 <OMRON Co.>
Recommended Cable Cover
XM2S-0913 <OMRON Co.>
Recommended Jack Screw
(#4-40 UNC)
XM2Z-0073 <OMRON Co.>
Pin
Arrangement
Pin No.
RS232C
Signal Name
Direction
Meaning
1
CD
Input
Carrier Detect
2
RD(RXD)
Input
Receive Data
3
SD(TXD)
Output
Send Data
4
ER(DTR)
Output
Data Terminal Ready
5
SG
-
Signal Ground
6
DR(DSR)
Input
Data Set Ready
7
RS(RTS)
Output
Request to Send
8
CS(CTS)
Input
Send Possible
9
CI(RI)/VCC
Input/-
Called status display
+5V
±
5% Output 0.25A
*2
Shell
FG
-
Frame Ground
(Common with SG)
Pin
Arrangement
Pin No.
RS422/RS485
Signal Name
Direction
Meaning
1
RDA
Input
Receive Data A(+)
2
RDB
Input
Receive Data B(-)
3
SDA
Output
Send Data A(+)
4
ERA
Output
Data Terminal Ready A(+)
5
SG
-
Signal Ground
6
CSB
Input
Send Possible B(-)
7
SDB
Output
Send Data B(-)
8
CSA
Input
Send Possible A(+)
9
ERB
Output
Data Terminal Ready B(-)
Shell
FG
-
Frame Ground
(Common with SG)
9
6
5
1
(LT unit side)
9
6
5
1
(LT unit side)