Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
SHORT HAUL FIBER INTERFACE (MA-620)
The MA-620 is a Short Haul Fiber Interface Module, which supports the new IEEE standard C37.94
for N times 64 kilobit per second Optical Fiber Interfaces between Teleprotection and Multiplexer
Equipment. When used with the DS562I, the MA-620 complies with the standard for N = 1. The
module is mounted at the rear of an RFL IMUX 2000 chassis, directly opposite the DS562I module.
The input power requirement is +5 Volts at 200 mA maximum from the chassis supply. The input drive
signals are TTL logic-level, generated by the DS562I.
Table 13. Short Haul Fiber Interface Module, Characteristics
Module A
ssembly
Number
Type Wavelength/
Mode
Connector
Type
Receiver
Sensitivity
Tx Level Typical
Distance
MA-620 107245 LED
Emitter/
Detector
830 (+/- 40 nm)
multimode
ST -11dBm to -32dBm -14dBm to -21dBm
Average into 50um fiber
-11dBm to -18dBm
Average into 62.5um fiber
Up to 2km
(1.2 mi.)
MA-621 107245-1 LED
Emitter/
Detector
1300nm
singlemode
ST -14dBm to -35dBm -17dBm to -34dBm Up to 2km
(1.2 mi.)
MA620
DATA
YEL
ALARM
RX
TX
SW1-4
SW1-1
5 4 1 6
2 3
TX
RX
YEL
ALARM
DATA
Figure 10. Controls and indicators, MA-620 Module Adapter
RFL DS-562I RFL
El
ectronics Inc.
June 14, 2007 22 (973)
334-3100
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