Connections, Configuration, Ge multilin – GE F485 User Manual

Page 4: F485 communications converter

Advertising
background image

F485 COMMUNICATIONS CONVERTER

Page

4 of 8

g

GE Multilin

CONNECTIONS

805700A1.CDR

RS232

COMPUTER

FIBER OPTIC

RS485

POWER

POWER

9V

AC/DC

Tx

Rx

COM

RS232

FIBER

POWER JACK

The RS232 connector on the F485 converter accepts a
standard 9-pin computer cable. See wiring diagram for pin
assignments.

The fiber input/output will accept 50/125, 62.5/125 and
100/140um fiber sizes using ST terminated cables. Care
should be taken when removing the protective caps to
prevent dust from entering the connectors.

Connect the supplied power
adapter to this input if power is not
supplied via the terminals. The
power adapter steps down
120/220 VAC to 9 VAC.

RS485

The RS485 terminals accept a standard shielded twisted
pair (such as Beldon 9841) and provide connections for a
"+", "-" and a shield. The RS485 terminals have a
terminating network installed internally and therefore, no
external terminating network is required. Observe correct
polarity.

POWER TERMINALS

The power terminals accept either 9 VAC or 9 VDC to power
the F485 converter instead of using the power adapter. The
GND terminal must be connected to ground to ensure
adaquate protection against transients. Pin 4 is the main
transient ground for the converter.

GND

1

2

3

4

5

6

+

-

+

-

Figure 3: Connections

CONFIGURATION


The converter box is configured via two internal dip switch banks which are accessible by removing the
converter box cover. Switches A1-A8 are used to set the baud rate for RS485 communications and
determine whether the converter is DTE (RS232 direct) or DCE (RS232 modem). Switches B1-B6 are
used to select the interface type. The designator for each switch is clearly marked on the printed circuit
board. The tables shown below provide a description of each switch within the switch banks.

Figure 4: Switch Locator

SWITCH A (BAUD RATES)

BAUD

A1

A2

A3

A4

A5

A6

A7

1200

ON

OFF

OFF

OFF

OFF

OFF

OFF

2400

OFF

ON

OFF

OFF

OFF

OFF

OFF

4800

OFF

OFF

ON

OFF

OFF

OFF

OFF

9600

OFF

OFF

OFF

ON

OFF

OFF

OFF

19200

OFF

OFF

OFF

OFF

ON

OFF

OFF

38400

OFF

OFF

OFF

OFF

OFF

ON

OFF

57600

OFF

OFF

OFF

OFF

OFF

OFF

ON


SWITCH B (CONFIGURATION)

CONFIGURATION

B1

B2

B3

B4

B5

B6

RS232 TO RS485

OFF

ON

OFF

ON

OFF

OFF

RS232 TO FIBER

OFF

OFF

OFF

OFF

ON ON

RS485 TO FIBER

ON

OFF

ON

OFF

OFF

OFF

SWITCH A (DTE/DCE)

MODE

A8

DTE

OFF

DCE

ON

Advertising