Table of Contents
Advertisement
Cello Installation Guide
MAN-CELIG (Ver. 1.5)
3.4.9 Communication Cables
The communication cables use an 8-pin RJ-45 plug that connect to the RS-232 and
CANopen ports on the "top" of the Cello.
The communication interface may differ according to the user's hardware. The Cello 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 Cello 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.
3.4.9.1 RS-232 Communication
Notes for connecting the RS-232 communication cable:
Use a 26 or 28 AWG twisted pair shielded cable. 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.
The male RJ plug must have a shield cover.
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
1
2
3
4
5
6
7
8
Signal
—
—
Tx
—
COMRET
Communication return
Rx
—
—
Table 3-14: RS-232 Cable - Pin Assignments
Function
—
—
RS-232 transmit
—
RS-232 receive
—
—
Installation
3-36
Pin Location
Advertisement
Table of Contents
