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3.4.8 Communication Cables
The communication cables use a 9-pin D-sub plug that connect to the RS-232 and 9-pin D-sub
socket that connects to the CANopen ports on the Drum.
The communication interface may differ according to the user’s hardware. The Drum can
communicate using the following options:
a. RS-232, full duplex
b. CANopen
RS-232 communication requires a standard, commercial 3-core null-modem cable connected
from the Drum 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. The interface is electrically
isolated by optocouplers.
For ease of setup and diagnostics of CAN communication, RS-232 and CANopen can be used
simultaneously.
3.4.8.1 RS-232 Communication
Notes for connecting the RS-232 communication cable:
Use a 24, 26 or 28 AWG twisted pair shielded cable (24 AWG cable is recommended).
The shield should have aluminum foil covered by copper braid with a drain wire.
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.
Use only a D-sub connector with a metal housing.
Attach the braided shield tightly to the metal housing of the D-type connector.
When assembling the Communication cable, follow the instructions in Section
3.4.3
(Feedback Control and Communication Cable Assemblies).
Pin Signal Function Pin Location
1 — —
2 Tx RS-232 transmit
3 Rx RS-232 receive
4 — —
5 COMRET Communication return
6 — —
7 — —
8 — —
Table 3-14: RS-232 Cable - Pin Assignments
J2
Female
Drum Installation Guide Installation
MAN-DRUIG (Ver. 1.0)
3-42