DC Puse Power Supply
【
DC-10-4P
】
8
APPENDIX
70
8-1. Overview of serial communications
The DC-10-4P power has a communications interface accessible from a serial port. This provides direct
control from a host computer via serial communication.
In addition, RS232C and RS485 are both available.
As shown in Fig.8-2, the on-board connector of the serial port is a D-SUB9 pin male connector, which is
mounted on the unit back face.
DC-10-4P Serial port
Figure 8-2: DC-10-4P serial port arrangement
8-1-1. Serial communication specifications
The DC-10-4P communication specifications are as follows.
Communications protocol:
RS-232C/RS-485
Communication rate: Selectable from 115200bps
/ 57600bps / 38400bps / 19200bps / 9600bps
Data length: 8 bit
Stop bit: 1
Parity: none
In addition, each pin of the serial port connector is described in Table 8-1 below.
Table 8-1: Description of serial port pin
Pin No. Signal name
Detail
Pin No.
Signal name
Detail
1
Do not connect.
6
Do not connect.
2
RS232 RXD
Incoming data received by
DC
7
RS485 TxD+/RxD+
Positive (+) signal*2 of RS485
differential signal
3
RS232 TXD
Data transmitted from DC
8
RS485 TxD-/RxD-
Negative (-) signal*2 of RS485
differential signal
4
Do not connect.
9
Do not connect.
5
GND
RS232C, RS485 signal GND*1
*1
Be sure to connect GND.
*2
For RS485, it is recommended to use a twisted pair type of positive (+) and negative (-) signal lines.
8-1-2. How to connect
RS232C communication
For DC, RXD has 2 pins and TXD has 3 pins. Connect to the HOST computer with a crossing cable.
The cable connecting between HOST and DC shall be 10 m or less at the longest in length.
Figure 8-3: Connection of DC in RS232C communication
HOST
DC PULSE
TXD
RXD
GND
3pin TXD
2pin RXD
5pin GND
～10m(MAX)
Use a crossing cable
Содержание DC-10-4P
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