GE TV Converter Box F485 User Manual

F485  
COMMUNICATIONS CONVERTER  
Instruction Manual  
Manual P/N: 1601-0073-A3  
Copyright © 2003 GE Multilin  
805701A1.CDR  
E83849  
LISTED  
IND.CONT. EQ.  
52TL  
g
GE Multilin  
215 Anderson Avenue, Markham, Ontario L6E 1B3  
Tel: (905) 294-6222 Fax: (905) 201-2098  
Toll Free: 1-800-547-8629 (North America)  
 
F485 COMMUNICATIONS CONVERTER  
Page 3 of 8  
FEATURES  
•
•
•
•
Converts between RS232, RS485 or Fiber  
1200 to 57600 baud rates  
Isolated RS485 interface  
50/125µm, 62.5/125µm, and 100/140µm fiber  
sizes  
•
Front panel LEDs for power, RS232 Rx/Tx,  
and RS485 Rx/Tx  
•
•
Two possible mounting arrangements  
120 V AC (ANOMA AEC-3590 or other listed  
direct plug-in Class 2 power supply rated  
maximum 9 V DC output) or 220 V AC adapter  
included.  
805701A1.CDR  
•
•
•
•
Additional power supply terminals supplied to  
accept isolated 9 V AC / 9 V DC  
Two interface cables provided  
(9pin – 9pin, 9pin – 25pin)  
Suitable for use with direct or modem  
communications.  
E83849 UL Listed for the USA and Canada  
DESCRIPTION  
The F485 is a self-contained device for converting between RS232, RS485, and fiber optic signals. The  
converter uses internal switches to select the conversion type (RS232 to RS485, RS232 to FIBER, or  
RS485 to FIBER) and the RS485 communications baud rates up to 57600 baud. The F485 converter  
uses the data on the serial port to determine direction and therefore requires no hardware handshaking  
signals from the computer. The F485 converter can be powered via the power adapter supplied or by  
connecting an external isolated 9 V AC/DC source to the power supply terminals located at the back of  
the case. The F485’s versatility and simple design makes it ideal for use with all GE Multilin products in  
direct and modem communications.  
TYPICAL CONFIGURATIONS  
Figure 1: RS232 to RS485 connection  
Figure 2: RS232 to FIBER and FIBER to RS485  
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GE Multilin  
 
F485 COMMUNICATIONS CONVERTER  
Page 4 of 8  
CONNECTIONS  
RS485  
The RS485 terminals accept a standard shielded twisted  
RS232  
The RS232 connector on the F485 converter accepts a  
standard 9-pin computer cable. See wiring diagram for pin  
assignments.  
pair (such as Beldon 9841) and provide connections for a  
shield. The RS485 terminals have  
"+", "-" and  
a
a
terminating network installed internally and therefore, no  
external terminating network is required. Observe correct  
polarity.  
POWER JACK  
RS232  
FIBER OPTIC  
RS485  
POWER  
POWER  
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.  
Tx  
Rx  
COMPUTER  
1
+
2
-
3
4
5
+
6
-
9V  
AC/DC  
COM GND  
FIBER  
POWER TERMINALS  
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.  
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.  
805700A1.CDR  
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  
SWITCH A (DTE/DCE)  
1200  
2400  
4800  
9600  
19200  
38400  
57600  
ON  
OFF  
ON  
OFF  
OFF  
ON  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
MODE  
A8  
OFF  
ON  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
DTE  
OFF  
OFF  
OFF  
OFF  
OFF  
DCE  
OFF  
OFF  
OFF  
SWITCH B (CONFIGURATION)  
CONFIGURATION  
RS232 TO RS485  
RS232 TO FIBER  
RS485 TO FIBER  
B1  
B2  
ON  
OFF  
OFF  
B3  
B4  
ON  
OFF  
OFF  
B5  
OFF  
ON  
B6  
OFF  
ON  
OFF  
OFF  
ON  
OFF  
OFF  
ON  
OFF  
OFF  
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GE Multilin  
 
F485 COMMUNICATIONS CONVERTER  
Page 5 of 8  
BAUD RATES  
Two-wire RS485 is half duplex and requires a means for switching between a receive or transmit state.  
The F485 converter uses the incoming data to control the direction and therefore requires no control  
signals from the master device (RS232 or fiber) to switch from transmit to receive mode after the last  
character has been transmitted. The baud rate switches control the length of time that the RS485  
transmitter will remain in the transmit direction after the last character has been transmitted. The length of  
time is fixed at 3.5 character times at the selected baud rate making it suitable for use with Modbus® RTU  
protocol. When converting RS232 to FIBER, these switches (A1-7) have no effect.  
DTE/DCE CONTROL  
The DTE/DCE setting reverses the transmit/receive data lines on the RS232 side. For communications  
between a computer and a slave device, DTE (direct) should be selected. When connecting the F485  
converter to a modem or other data communications equipment, DCE should be selected. Another  
application which requires DCE is when two F485 converters are connected back-to-back i.e. converting  
RS232 to RS485 or fiber and then converting the RS485 or fiber back to RS232. In this case, the second  
F485 must be set to DCE control.  
NOTE: Selecting switch settings other than those shown above will cause unpredictable results.  
FIBER OPTIC TRANSMITTER/RECEIVER (optional)  
Fiber optic transmissions provide an ideal solution for areas where RS485 communications via a twisted  
pair have traditionally caused problems. Fiber is immune to electrical interference and provides total  
isolation.  
The fiber optic transmitter and receiver used in the F485 converter utilize 820nm wavelength technology  
and are designed to operate with 50/125µm, 62.5/125µm and 100/140µm fiber sizes using ST terminated  
cables. The ST connections provide repeatable connections within 0.2 dB typically. The  
transmitter/receiver pair will typically work with fiber lengths up to 1km.  
WARNING: Ensure the dust covers are installed when the fiber is not in use. Dirty or  
scratched connectors can lead to high losses on a fiber link.  
WARNING: Observing the transmitter output under magnification may cause injury to  
the eye.  
INSTALLATION  
Two different mounting arrangements are possible. The first is by using the two mounting holes inside the  
plastic case along with the mounting screws supplied. To remove the plastic top, simply press in the two  
plastic tabs on either end of the box and then pull off the top. The second and less permanent method is  
to use the Velcro material supplied for attachment to the side of a computer or desk. Where possible,  
ensure that the LEDs on the front panel are visible. The LEDs are a very valuable tool when  
troubleshooting a problem.  
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GE Multilin  
 
F485 COMMUNICATIONS CONVERTER  
Page 6 of 8  
WIRING DIAGRAM  
ISOLATED  
TERMINATION  
AND LINE BIAS  
RS485  
CONVERTER  
BAUD RATE  
SWITCHES  
DIRECTION  
TIMER  
DATA  
+
1
2
3
4
TO RELAYS  
-
SHIELD  
GND  
SR489 STATUS GENERATOR STATUS OUTPUT RELAYS  
SR489 IN SERVICE  
SETPOINT ACCESS  
COMPUTER RS232  
COMPUTER RS485  
AUXILIARY RS485  
BREAKER OPEN  
R1 TRIP  
BREAKER CLOSED  
R2 AUXILIARY  
R3 AUXILIARY  
R4 AUXILIARY  
R5 ALARM  
HOT STATOR  
NEG. SEQUENCE  
GROUND  
AL  
T
.
SETPOINTS  
LOSS OF FIELD  
VT FAILURE  
R6 SERVICE  
RESET  
POSSIBLE RESET  
MESSAGE  
NEXT  
BREAKER FAILURE  
PROGRAM PORT  
SETPOINT  
7
8
5
9
6
MESSAGE  
ACTUAL  
ESCAPE  
ENTER  
4
1
.
2
3
VALUE  
HELP  
0
GE MULTILIN  
RS485  
LED Rx  
TM  
489 Generator Management Relay  
e
F485 CONVERTER  
RS485  
LED Tx  
ST  
CONFIGURATION  
SWITCH  
CONNECTOR  
Tx  
Rx  
DATA  
`
RS232  
50/125 um fiber  
`
LED Rx  
62.5/125 um fiber  
`
VOLTAGE  
INPUT  
9VAC/9VDC  
+
-
5
6
100/140 um fiber  
RS232  
LED Tx  
RS232 INTERFACE  
F485  
COMPUTER  
DTE/DCE  
RELAY  
1
1
2
3
4
5
6
7
8
9
8
DATA  
RS232  
DRIVER  
TXD  
RXD  
2
3
4
5
6
7
8
9
3
TXD  
RXD  
2
20  
7
SGND  
SGND  
DTE/DCE  
SWITCH  
+5V  
6
POWER SUPPLY  
4
~
+
+5V  
POWER  
5V  
9VAC/  
9VDC  
5
9VDC  
-
20  
POWER  
JACK  
~
9 PIN  
CONNECTOR  
25 PIN  
CONNECTOR  
COMPUTER  
120/220 VAC  
RS232  
POWER ADAPTER  
805752A9.CDR  
ORDER CODE  
DIMENSIONS  
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GE Multilin  
 
F485 COMMUNICATIONS CONVERTER  
Page 7 of 8  
GE Multilin Relay Warranty  
General Electric Multilin Inc. (GE Multilin) warrants each relay  
it manufactures to be free from defects in material and  
workmanship under normal use and service for a period of 24  
months from date of shipment from factory.  
In the event of a failure covered by warranty, GE Multilin will  
undertake to repair or replace the relay providing the  
warrantor determined that it is defective and it is returned with  
all transportation charges prepaid to an authorized service  
center or the factory. Repairs or replacement under warranty  
will be made without charge.  
Warranty shall not apply to any relay which has been subject  
to misuse, negligence, accident, incorrect installation or use  
not in accordance with instructions nor any unit that has been  
altered outside a GE Multilin authorized factory outlet.  
GE Multilin is not liable for special, indirect or consequential  
damages or for loss of profit or for expenses sustained as a  
result of a relay malfunction, incorrect application or  
adjustment.  
For complete text of Warranty (including limitations and  
disclaimers) refer to GE Multilin Standard Conditions of Sale.  
g
GE Multilin  
 
g
GE Multilin  
215 Anderson Avenue  
Markham, Ontario  
Canada L6E 1B3  
Tel: (905) 294-6222  
Fax: (905) 201-2098  
 

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