GE F485 User Manual

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F485 COMMUNICATIONS CONVERTER 
Page
 
3 of 8 
g
GE Multilin
 
 
 
 
 
805701A1.CDR
 
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. 
•  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