• The FOM-485, Asynchronous RS-485 Miniature Fiber Optic Modem provides the capability of transmitting an RS-485 or V.11 signal via a fiber optic link. FOM-485 is used mainly for data transmission in utility applications. The asynchronous data rate can be up to 115.2 kbps in full or half duplex mode.

• FOM-485 performs diagnostic loops in compliance with the ITU V.54 standard. Two V.54 loops are available: local analog loop (loop 3) and remote digital loop

  
  (loop 2). The loops are activated by external dipswitches on the top of the product. Local digital loop is also available. The loops are available in ITU V.11 only.

• FOM-485 includes a built-in V.52 standard BER tester for testing link integrity. The internal BER tester is activated by an external dipswitch on the top of the modem (PATT). The ERR LED blinks when an error is detected in the data transmission.

• Power necessary for FOM-485 is derived from a standard, wall-mounted, power supply DC adapter. The DC voltage range is 300 mA to 9V.

• FOM-485 incorporates all the advantages of a fiber optic system, providing:
  • Lower attenuation than with copper wire
  • EMI/RFI immunity, saving the cost of expensive and heavy shielding, and complex error checking routines
  • Almost absolute security and reduction in the cost of data encryption
  • Eavesdropping is virtually impossible as negligible power is radiated from the fiber
  • Safety and electrical isolation: no spark hazard and no ground-loop noise problems.

SPECIFICATIONS

• Provides Asynchronous transmission up to 115.2 kbps
• Operates full duplex over 4-wire of half duplex over 2-wire or 4-wire
• Meets ITU RS-485 and ITU V.11 requirements
• Meets ITU V.54 and ITU V.52 requirements (in V.11 only)
• Operates over multimode or single mode fiber optic
• Six LED indicators
• Miniature, lightweight, easy to install
• Operates with an external, wall-mounted, power supply
• Point-to-point or multipoint applications up to 32 units in RS-485

FOM-485/*/#/&

Asynchronous RS-485 Miniature Fiber Optic Modem 
 

P/S-230/9/300 for 230 VAC power supply adapter
P/S-115/9/400 for 115 VAC power supply adapter

ORDERING

FOM-485/115/SC13/RJ45
FOM-485/115/ST13/RJ45
FOM-485/115/ST13/TB
FOM-485/115/ST85/RJ45
FOM-485/115/ST85/TB
FOM-485/230/ST13/TB

 
APPLICATION