
DC Power
【
DC-10/DC-20
】
8. Appendix
57
8-1. Overview of serial communications
The DC-10/20 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.
The serial port connector on DC-10/20 is a D-SUB 9-pin male connector shown in Fig. 8-2, which is built
in the back of DC-10/20 unit.
DC-10/20 Serial Port
Figure 8-2: DC-10/20 serial port arrangement
8-1-1. Serial communication specifications
The DC-10/20 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
1
Do not connect.
2
RS232 RXD Incoming data received by DC
3
RS232 TXD Data transmitted from DC
4
Do not connect.
5
GND
RS232C, RS485 signal GND*1
6
Do not connect.
7
RS485
TxD+/RxD+
Positive (+) signal*2 of RS485 differential signal
8
RS485
TxD-/RxD-
Negative (-) signal*2 of RS485 differential signal
9
Do not connect.
※
1
Be sure to connect GND.
※
2
For RS485, it is recommended to use a twisted pair type of positive
(+) and negative (-) signal lines.
Содержание DC-10
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