Siemens ISOLATED MULTI-DROP SG-6048-01 - Manual (Page 7)

3
Installing the Converter
4 Siemens Energy & Automation, Inc.
3 Installing the Converter
3.1 Getting 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).
3.2 Preparing 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.
Figure 3.1 Communications Cable Connection
BLK
WHT
+ -