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Chapter 3 Connections and Wiring|ASDA-AB Series
3-32 Revision January 2009
3.5 Serial Communication Connector CN3
3.5.1 CN3 Terminal Layout and Identification
The servo drive can be connected to a PC or controller via a serial communication connector. Users can
operate the servo drive through PC software supplied by Delta (contact to the dealer). The
communication connector/port of Delta servo drive can provide three common serial communication
interfaces: RS-232, RS-485, and RS-422 connection. RS-232 is mostly be used but is somewhat limited.
The maximum cable length for an RS-232 connection is 15 meters (50 feet). Using RS-485 or RS-422
interface can allow longer distance for transmission and support multiple drives to be connected
simultaneously.
Figure 3.11 The layout of CN3 Drive Connector
CN3 Terminal Signal Identification
PIN No. Signal Name
Terminal
Identification
Description
1 Grounding GND -
2 RS-232 data transmission RS-232-TX
For data transmission of the servo drive.
Connected to the RS-232 interface of PC.
3 RS-422 data receiving RS-422-RX+
For data receiving of the servo drive
(differential line driver + end)
RS-232 data receiving RS-232_RX
For data receiving of the servo drive.
Connected to the RS-232 interface of PC.
4
RS-422 data receiving RS-422_RX-
For data receiving of the servo drive
(differential line driver - end)
5 RS-422 data transmission RS-422-TX+
For data transmission of the servo drive
(differential line driver + end)
6 RS-422 data transmission RS-422-TX-
For data transmission of the servo drive
(differential line driver - end)
NOTE
1) For the connection of RS-485, please refer to page 8.2 and 8.3.
2) There are two kinds of IEEE1394 communication cables available on the market. If the user uses
one kind of cable, which its GND terminal (Pin 1) and its shielding is short-circuited, the
communication may be damaged. Never connect the case of the terminal to the ground of this kind
of communication cable.