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 9 (973) 334-3100
SW6-1 thru SW6-3 for Channel 1
SW7-1 thru SW7-3 for Channel 2
SW8-1 thru SW8-3 for Channel 3
SW9-1 thru SW9-3 for Channel 4
Used to set the baud rate (See Table 8 and Note 1).
SW6-4 thru SW6-6 for Channel 1
SW7-4 thru SW7-6 for Channel 2
SW8-4 thru SW8-6 for Channel 3
SW9-4 thru SW9-6 for Channel 4
Used to set the channel start bit (See Table 9 and Note 2).
7 DIP Switch SW6 thru
SW9 channel switches
SW6-7 thru SW6-8 for Channel 1
SW7-7 thru SW7-8 for Channel 2
SW8-7 thru SW8-8 for Channel 3
SW9-7 thru SW9-8 for Channel 4
Used to set the number of bits per character (See Table 10 and Note 3).
8 Test point TP3 Ground
9 Test point TP4 +3.3V
10 Test point TP5 +2.5V
11 Test point TP1 +5V
12 Test point TP2
Ground
13 Test point TP12
Ground
14 Test point TP16 Channel 4 Receive Data
15 Test point TP15 Channel 3 Receive Data
16 Test point TP6 Ground
17 Test point TP11 Channel 4 Transmit Data
18 Test point TP10 Channel 3 Transmit Data
19 Test point TP14 Channel 2 Receive Data
20 Test point TP9 Channel 2 Transmit Data
21 Test point TP8 Channel 1 Transmit Data
22 Test point TP13 Channel 1 Receive Data
23 Test point TP7 250Hz Clock
24 Test point TP17 Ground
Note 1. (Baud Rate)
Used to select the Asynchronous baud rate of the channel. Available options are 38400, 19200, 9600,
4800, 2400, 1200, and 600 baud.
Note 2. (Channel Start Bit)
Sets the least significant timeslot bit on which the channel data is placed. 0-7 may be chosen. Channel
data is transmitted MSB (most significant bit) first, which is bit 7. The amount of bits used is
determined automatically from the baud rate (see table below). Time slot sharing is only allowed
between the two channels of a single Async module, not between two modules. For example with
19200 baud and 4 as the channel timeslot start bit, bits 4 through 7 are used for this channel.
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