SER-485-IC_0710 R2
N-Tron Corp.
820 S. University Blvd. Suite 4E, Mobile, AL 36609
PH: 251-342-2164 · FAX: 251-342-6353
6
6
.
.
P
P
o
o
w
w
e
e
r
r
C
C
o
o
n
n
n
n
e
e
c
c
t
t
i
i
o
o
n
n
Power Requirements:
10 – 48 VDC @ 0.2A
7
7
.
.
R
R
S
S
-
-
2
2
3
3
2
2
C
C
o
o
n
n
n
n
e
e
c
c
t
t
i
i
o
o
n
n
1. DB9 F is DCE, Pin 2(RD) is the converter’s RS-232
Data output. Pin 3 (TD) is the converter’s RS-232
Data input.
2. Pins 1, 4, and 6 (DCD, DTR, and DSR) are tied
together inside the converter.
3. Pins 7 and 8 (RTS and CTS) are tied together
inside the converter.
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
e
e
s
s
Two Wire RS-485
9
9
.
.
L
L
o
o
o
o
p
p
B
B
a
a
c
c
k
k
T
T
e
e
s
s
t
t
/
/
T
T
r
r
o
o
u
u
b
b
l
l
e
e
s
s
h
h
o
o
o
o
t
t
i
i
n
n
g
g
Configure for RS-485 Four wire, 9600 baud
Jumper terminals B to D and C to E
Connect a PC to the RS-232 port (see Step 7).
Using hyper terminal or similar program, connect to
the appropriate COM port (remember to set the
baud rate to 9600).Turn off hyper terminal local
echo
Transmit data. The same data should be returned.
LED Indicators: Power is ON when power is applied.
TD flashes when RS-422/485 data is sent. RD
flashes when RS-422/485 Data is received.
RS-422/ Four Wire RS-485
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
R-11
Timeout
(Kbps)
8 through 12
Value
(ms)
1.2
OFF
820 KΩ
8.32
57.6
OFF
16 KΩ
0.16
115.2
OFF
8.2 KΩ
0.08
Pre-defined timeouts are set using switches 8 through 12.
Resistor selectable baud rates are set by inserting a through
hole resistor (R-11) 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.
