Service manual

Connecting for local PC control on the remote connector

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Connecting for local PC control on the remote connector

To connect a PC to the

remote connector

To enable local communication between the S

TELLAR

and the PC, do the following:

1. Connect the Com port on the PC to the remote connector on the S

TELLAR

The remote connector is placed on the connector panel of the S

TELLAR

and is

labelled “RS-485”. It is a 9-pin male Sub-D connector which connects to the RS-

485 port of the PC using a 9-way cable. The cable may be unshielded.

The following table shows the connector and the pin allocation.

2. Configure the PC COM port in ROSA.

From the C

OPERNICUS

explorer, right-click on your COM port and select “Prop-

erties”. Select the “RCDS protocol” driver.

To convert from RS-232

to RS-485

If your PC is not equipped with an RS-485 I/O card you need an RS-232 to RS-485

9-pin sub-D converter. The order number is 806352.

Connect the RS-232 side of the adapter as close to the PC as possible, preferably con-

nected directly to the PC port. The RS-485 connector connects to the S

TELLAR

via a

9-way shielded cable. The converter does not require external power.

Connector drawing Pin number Description Use

pin 1 - Not connected

pin2 TxB Datatohost

pin 3 RxB Data from host

pin4 TxA Datatohost

pin 5 RxA Data from host

pin 6 - Not connected

pin 7 Ground Signal ground

pin 8 - Not connected

pin 9 - Not connected

98-022