Elmo 95VDC, Installation Manual

Page: 42 / 69

Duo User Guide
MAN-DUOUG (Ver. 1.0)
3-30
3.12 Communications
The communication cables use an 8-pin RJ-45 plug that connect to the RS232 and CANopen
ports on the Duo.
The communication interface may differ according to the user’s hardware. The Duo can
communicate using the following options:
1. RS232, full duplex
2. CANopen
RS232 communication requires a standard, commercial 3-core null-modem cable connected
from the Duo to a serial interface on the PC. The interface is selected and set up in the
Composer software.
In order to benefit from CANopen communication, the user must have an understanding of
the basic programming and timing issues of a CANopen network.
For ease of setup and diagnostics of CAN communication, RS232 and CANopen can be used
simultaneously.
3.12.1 RS232 Communication
Notes for connecting the RS232 communication cable:
ƒ Connect the shield to the ground of the host (PC). Usually, this connection is
soldered internally inside the connector at the PC end. You can use the drain wire to
facilitate connection.
ƒ The RS232 communication port is non-isolated .
ƒ
The male RJ plug must have a shield cover.
ƒ Ensure that the shield of the cable is connected to the shield of the RJ plug.
The drain wire can be used to facilitate the connection.
Pin Signal Function Pin Position
1 — —
2 — —
3 Tx RS232 transmit
4 — —
5 COMRET Communication return
6 Rx RS232 receive
7 — —
8 — —
RS-232
shield
body Drain Wire
Table 3-12: RS232 Cable - Pin Assignments