Siemens SG-6048-01 manual Installing the Converter, Getting Ready, Preparing the RS-485 Cable

3 Installing the Converter

3 Installing the Converter

3.1Getting Ready

This section explains how to install the Isolated Multi-Drop converter for your operation. You can install the converter either directly to a PC or remotely within switchgear using short-haul or dial-up modems. This section also tells you how to connect Static Trip III trip units and SAMMS devices to the converter’s power module, enabling you to test these devices in the field.

Before attempting to install the converter, check to see that you have the following parts in addition to the converter:

•a power cord

•a two-terminal connector

•four RS-485, three-terminal connectors

Note: Make sure that each device attached to the communications network through the converter has a unique address to prevent communications collisions. Device addressing is a process independent of installation. For instructions on how to program the address of a specific device, see the instruction manual for that device or refer to the latest revision of the ACCESS System Installation Guide. (Manual No. SG-6028).

3.2Preparing the RS-485 Cable

The converter comes with four connectors to connect your system’s RS-485 cable to the converter. Use these connectors to connect as many as four cable runs to the converter’s four RS-485 ports. To install connectors on RS-485 cable, follow these instructions and refer to Figure 3.1:

1.Strip the insulation off the black, white, and shield wires at both ends of the RS-485 communications cable, exposing approximately 0.5inch of metal wire on each.

2.Loosen the three screws in the RS-485 connector.

3.Insert the black wire from both ends of the communications cable into the Data(+) slot on the connector, and tighten the screw to secure the wires.

4.Insert the white wire from both ends of the communications cable into the Data(-) slot on the connector, and tighten the screw to secure the wires.

5.Insert the shield wire from only one end of the communications cable into the center slot on the connector, and tighten the screw to secure the wire.

6.Insert the connector into one of the RS-485 ports located on the front panel of the Isolated Multi-Drop converter.

+	-
BLK
WHT

Figure 3.1 Communications Cable Connection

4 Siemens Energy & Automation, Inc.