ElmoMC SimplIQ Digital Servo Drives-Drum HV - Manual (Page 60)

Drum HV (High Voltage) Installation Guide Installation
MAN-DRU-HVIG (Ver. 1.602)
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60
3.5.10. Communication Cables
The communication cables use a 9-pin D-sub plug that connects to the RS-232 and a 9-pin
D-sub socket that connects to the CAN ports of the Drum HV (High Voltage).
The communication interface may differ according to the user’s hardware. The Drum HV (High
Voltage) can communicate using the following options:
a. RS-232, full duplex
b. CAN
RS-232 communication requires a standard, commercial 3-core null-modem cable connected
from the Drum HV (High Voltage) to a serial interface on the PC. The interface is selected and
set up in the Composer software.
In order to benefit from CAN communication, the user must have an understanding of the basic
programming and timing issues of a CAN network.
The CAN interface is not isolated.
For ease of setup and diagnostics of CAN communication, RS-232 and CAN can be used
simultaneously.
3.5.10.1. 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 D-sub plug must have a shield cover.
• Ensure that the shield of the cable is connected to the shield of the D-sub plug. The drain
wire can be used to facilitate the connection.
Pin Signal Function Drawing
1 N/A
2 RS232_Tx RS-232 transmit
3 RS232_Rx RS-232 receive
4 N/A
5 COMRET Communication return
6, 7, 8, 9 N/A
Table 17: RS-232 Cable - Pin Assignments