ElmoMC Gold Line Digital Servo Drives-Gold Drum Ver 1_400 D-Sub connectors - Manual (Page 60)

Gold Drum (D-Sub Connectors) Installation Guide
MAN-G-DRUM(DTYPE)IG-EC (Ver. 1.400)
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Table of Contents
9.12.4. RS-232(P4)
The following is the recommended for RS-232 cabling:
1. 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.
2. The RS-232 communication port is non-isolated.
3. Ensure that the shield of the cable is connected to the shield of the connector used for
RS-232 communications. The drain wire can be used to facilitate the connection.
Figure 39: RS-232 Connection Diagram Example