Wiring examples, Rs-422/485 time out, Power connection – B&B Electronics 485OPDRI - Quick Start Guide User Manual
Page 2: Operation
Documentation Number – p/n 8455r002 485OPDRI-2212qsg
©2010 B&B Electronics Manufacturing Company
6
6
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.
P
P
o
o
w
w
e
e
r
r
C
C
o
o
n
n
n
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c
c
t
t
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Power Requirements:
10 – 48 VDC @ 0.2A
8
8
.
.
W
W
i
i
r
r
i
i
n
n
g
g
E
E
x
x
a
a
m
m
p
p
l
l
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e
s
s
Two Wire RS-485
RS-422 / Four Wire RS-485
9
9
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.
O
O
p
p
e
e
r
r
a
a
t
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1.
During normal operation, the Power LED
should be illuminated.
2.
When data is sent or received on either port,
the corresponding Data LED should flash.
5
5
.
.
R
R
S
S
-
-
4
4
2
2
2
2
/
/
4
4
8
8
5
5
T
T
i
i
m
m
e
e
O
O
u
u
t
t
Switch Selectable
Baud
Timeout
(Kbps)
8
9
10
11
12
(ms)
2.4
ON
OFF
OFF
OFF
OFF
4.37
4.8
OFF
ON
OFF
OFF
OFF
2.03
9.6
OFF
OFF
ON
OFF
OFF
1.02
19.2
OFF
OFF
OFF
ON
OFF
0.57
38.4
OFF
OFF
OFF
OFF
ON
0.27
Resistor Selectable
Baud
Timeout
(Kbps)
8 through 12
R-7 / 28 Value
(ms)
1.2
OFF
820 KΩ
8.32
57.6
OFF
16 KΩ
0.16
115.2
OFF
8.2 KΩ
0.08
230.4
OFF
4.3 KΩ
0.04
460.8
OFF
2.2 KΩ
0.02
Pre-defined timeouts are set using switches 8 through 12.
Resistor selectable baud rates are set by inserting a through
hole resistors (R-7 and R-28) on the circuit board.
Timeout selections are equal to one character time at the
indicated baud rate. Setting the converter to 9600 will
generally work at 9600 and higher baud rates. In RS-422
mode, timeouts are not required.