Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL DA-291B RFL Electronics Inc.
April 13, 2010 2 (973) 334-3100
SPECIFICATIONS
As of the date this Instruction Data Sheet was published, the following specifications apply to all RFL
DA-291B modules. Because all RFL products undergo constant refinement and improvement, these
specifications are subject to change without notice.
Data Rates
0.6, 1.2, 2.4, 4.8, 9.6, 19.2 and 38.4 kbps each channel
Coding
V.14 and V.110
Jitter
Less than 5%
Input bit rate tolerance
-2.5 to +1%
Character formats
9, 10, 11 bits total including start, stop and parity
Interface
Asynchronous data interface, one-way or full duplex, one to four
channel operation, four independent data ports
Time Slots
Depending on data rates, any one time slot or up to four contiguous time
slots.
4.8 kb/s and below occupies 1/8 of one timeslot
9.6 kb/s occupies 1/4 of one timeslot
19.2 kb/s occupies 1/2 of one timeslot
38.4 kb/s occupies a full timeslot
RS-232 Interface
(MA-404A)
Supports TX Data, RX Data, Clear to Send (CTS), Carrier Detect (CD)
Notes: CTS is always held in the active state
RJ-11 Connector
RS-232 Interface
(MA-420A, MA-440A)
Supports TX Data, RX Data, Clear to Send (CTS), Carrier Detect (CD)
Notes: CTS is always held in the active state
CD (RLSD) is active when T1/E1 receiver is in frame
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) for each port
Connector
DB-9 or RJ-11on the Module Adapters
Operating Temperature
-20°C to +65°C
Humidity
0% - 90% Non-condensing
Power Consumption
Less than 1W
Dimensions
Length: 9.8 in (24.8 cm)
Width: 0.6 in (1.5 cm)
Height: 4.5 in (11.4 cm)
Weight
Net: 4.8 oz (0.13 kg)
Shipping: 1 lb (0.45 kg)
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