41
14.4.
HVW-03CWP RS-232C Interface
The HVW-03CWP enables duplex communication using the RS-232C interface.
To connect the HVW-03CWP to a DTE (Data Terminal Equipment) such as a PC or external device, it is
necessary to use a communication cable sold separately.
AX-KO3285-320
Cable for PC or AD-8127 (D-Sub 9 pin 3m, inch screw)
AX-KO3341-320
Cable for AD-8121B (3m)
When confirming the communication format, refer to “14.6. Communication Format”.
Transmission
EIA RS-232C
Transmission form
Asynchronous, bi-directional
Data format
Baud rate : 2400, 4800, 9600 bps
Data bits :
7 bits + parity 1 bit (even or odd) or 8 bits (non parity)
Start bit :
1 bit
Stop bit :
1 bit
Code :
ASCII
Pin Assignments
Pin No.
Signal
Name
Direction
DCE-DTE
Description
1
RXD
←
Receive Data
2
TXD
→
Transmit Data
3
DSR
→
Data Set Ready
4
SG
-
Signal Ground
5
FG
-
Frame Ground
Names other than TXD and RXD are for the DTE side.
CAUTION
- When connecting to an external device with hardware flow control, communication will be
impossible using a cable without RTS and CTS connected. In that case, connect RTS and CTS.
This will disable hardware flow control, but enable communication.
-
When the connector of an external device is a D-sub 9-pin connector, pin 7 is RTS and pin 8 is
CTS.
-
When the AX-KO3285-320 cable is used, RTS and CTS are internally connected and the above
operation is unnecessary.
6 mm
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
RXD
TXD
DSR
SG
FG
AX-KO3341-320
AX-KO3285-320
1:
DCD
2:
RXD
3:
TXD
4:
DTR
5:
SG
6:
DSR
RXD
TXD
DSR
SG
FG
Brown
Red
Black
Yellow
Green
Blue
Brown
Red
Orange
Yellow
Green
Blue
Purple
Gray
White
Black
Shield
When connecting to AX-KO3285-320
When connecting to AX-KO3341-320
Black
Shrinking tube
（
DTE
）
Scale side
（
DCE
）
Inside the
scale
RXD
TXD
RTS
CTS
DSR
GND
Shield
2
1
3
4
5
TXD
RXD
DSR
SG
FG
External
device side
Terminal
example of
external
device side
Manufacturer
：
Phoenix Contact
Model name
：
SMKDSN 1,5/5-5,08
1 2 3 4 5
AWG16 to 26