Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL DA-191A RFL Electronics Inc.
July 23, 2001 2 (973)
334-3100
SPECIFICATIONS
As of the date this Instruction Data Sheet was published, the following specifications apply to all RFL
DA-191A modules. Because all RFL products undergo constant refinement and improvement, these
specifications are subject to change without notice.
Data Rates One or two channel operation: 0 bps to 19.2 kbps each channel
Four channel operation: 0 bps to 9.6 kbps each channel
Coding Four three-bit transitional coders (one for each port) to minimize data
jitter, with mark for idle state
Jitter Dependent on maximum data rate selected:
19.2 kbps = 8 µS p-p
9.6 kbps = 16 µS p-p
4.8 kbps = 32 µS p-p
Interface Asynchronous data interface, one-way or full duplex, one to four
channel operation, four independent RS-232 data ports
Time Slots Depending on data rates, any one time slot or any two contiguous time
slots
RS-232 Interface
(MA-404A, MA-420A,
MA-440A)
Supports TX Data, RX Data, Clear to Send (CTS), Carrier Detect
Four-Wire RS-485/422
Interface (MA-425)
Supports Send Data A, Send Data B, Receive Data A, Receive Data B
Indicators LED indicators for Service On, Data In (Tx activity), and Data Out
(Rx activity)
Connector RJ-11, DB-9 or ST fiber connectors on the Module Adapter
Operating Temperature -20°C to +55°C
Humidity 0% - 90% Non-condensing
Power Consumption 1.2 watts nominal
Dimensions Length: 9.8 in (24.8 cm)
Width: 0.6 in (1.5 cm)
Height: 4.5 in (11.4 cm)
Weight Net: 10 oz (0.28 kg)
Shipping: 1 lb (0.45 kg)
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