The Multi-Drop Self-Healing Ring Transmission series products provide an optical self-healing ring network for RS232, RS422 /RS485 data interfaces over two multimode or singlemode optical fibers. The system offers maximum reliability as it can recover simultaneous faults or failures in two different locations and has contact closure outputs on each module to clearly indicate any fault location. The self-healing ring consists of two opposing data paths, ring A and ring B. Under normal operation only the primary path (ring A) is used for data transfer. If a fault is detected, the data is transferred to the secondary path (ring B) without interruption to the communications network.
The series is available in wall mount, DIN rail or 3U chassis card.

Product Features
Supports RS232, RS422 and RS485
Multimode and singlemode solutions
Contact closure alarm outputs per station
Single or dual fibre configurations
Wall mount, DIN rail and 3U chassis card

Data
Data Formats	RS232,RS422,RS485
RS232 Data Rate	115.2kbps
RS422 / 485 Data Rate	512 kbps or 1Mkbps
Bit Error Rate	<1 x 10-12
Connectors
Data	Screw Block Terminal
Fiber	ST, SC or FC (ST fitted as standard)
Environmental
Operating Temperat ure	- 3 0 C--- +70 C
Storage Temperature	- 3 0 C--- +70 C
Operating Humidity	0- 95%
MTBF	>100,000 Hours
Optical
Fiber	Multimode or singlemode
Wavelength	MM: 850nm, SM: 1310nm
Number of fibers	4 or 2
POWER
Power Input	AC 220V 110v or DC+110V +5V +12V +24V +48V Option
Mechanical
Dimensions	125(L)×110(W)×36(H )Wall Mount & DIN Rail