Ntron SER-485-IR User manual
SER-485-IR_2510 R3
N-Tron Corp.
820 S. University Blvd. Suite 4E, Mobile, AL 36609
PH: 251-342-2164 · FAX: 251-342-6353
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SER-485-IR Isolated Repeater
This Quick Start Guide
Additional Items Required but not included
oA 10 to 48 VDC Power Supply.
oRS-422/485 Cables.
2
2.
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In
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U
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1
1
D
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2
2
1. Power, input /output (I/O) wiring must be in
accordance with Class 1 Division 2 wiring methods
[Article 501.10(B) of the National Electric code,
NFPA70] and in accordance with the local authority
having jurisdiction.
2. Maximum ambient air temperature 80°C
3. WARNING –EXPLOSION HAZARD:
SUBSTITUTION OF COMPONENTS MAY IMPAIR
SUITABLITY FOR CLASS 1, DIVISION 2.
4. WARNING –EXPLOSION HAZARD: WHEN IN
HAZARDOUS LOCATIONS, TURNING OFF
POWER BEFORE REPLACING OR WIRING
MODULES
5. WARNING –EXPLOSION HAZARD: DO NOT
DISCONNECT EQUIPMENT UNLESS POWER HAS
BEEN SWITCHED OFF OR THE AREA IS KNOWN
TO BE NON-HAZARDOUS.
6. WARNING –THIS APPARATUS IS SUITABLE FOR
USE IN CLASS 1 DIVISION 2, GROUPS A, B, C,
AND D, OR UNCLASSIFIED AREAS.
Quick Start Guide
SER-485-IR
Triple Isolated RS-422/485
Repeater
3
3.
.
I
In
nf
fo
or
rm
ma
at
ti
io
on
n
–
–
F
Fr
ro
on
nt
t
P
Pa
an
ne
el
l
Front Panel
1
Power TB
2 Position, Removable
2
DATA LED
Red, Flashes when RS-422/485
Data Received on TB1
3
TB 1
5 Position, Removable
4
TB 2
5 Position, Removable
5
DATA LED
Red Flashes when RS-422/485
Data Transmitted on TB2
6
Power LED
Red, ON When Power Applied
7
Dip Switch
12 Position, One on the top of the
Unit, on the bottom of the unit
RS-422/485 Terminal Blocks
TB1
RS-485 2-Wire
RS-422/485 4-Wire
A
GND
GND
B
Data B(+)
RDB(+)
C
Data A(-)
RDA(-)
D
---
TDB(+)
E
---
TDA(-)
TB2
RS-485 2-Wire
RS-422/485 4-Wire
F
GND
GND
G
Data B(+)
RDB(+)
H
Data A(-)
RDA(-)
I
---
TDB(+)
J
---
TDA(-)
4
4.
.
I
In
nf
fo
or
rm
ma
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n
-
-
D
DI
IP
P
S
Sw
wi
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tc
ch
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Communications Mode
1
2
3
4
RS-485
ON
ON
ON
ON
2-Wire
Half Duplex
RS-485
ON
OFF
OFF
OFF
4-Wire
Full Duplex
RS-422
OFF
OFF
OFF
OFF
Full
Duplex
Termination Resistor
5
Use the 120Ω
ON
Built in Termination
Use External
OFF
or no termination
Transmit Bias
6
Use the 1.2KΩ
Transmit
OFF
Bias Resistor
Use External or no
ON
Transmit Bias Resistor
Receive Bias
7
Use the 1.2KΩ Receive
OFF
Bias Resistor
Use External or no
ON
Transmit Bias Resistor
SER-485-IR_2510 R3
N-Tron Corp.
820 S. University Blvd. Suite 4E, Mobile, AL 36609
PH: 251-342-2164 · FAX: 251-342-6353
6
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Power Requirements:
10 –48 VDC @ 0.2A
7
7.
.
W
Wi
ir
ri
in
ng
g
E
Ex
xa
am
mp
pl
le
es
s
Two Wire RS-485
RS-422 / Four Wire RS-485
8
8.
.
O
Op
pe
er
ra
at
ti
io
on
n
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
RS
S-
-4
42
22
2/
/4
48
85
5
T
Ti
im
me
e
O
Ou
ut
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.
