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
o
A 10 to 48 VDC Power Supply.
o
RS-422/485 Cables.
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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.
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WARNING –
THIS APPARATUS IS SUITABLE FOR
USE IN CLASS 1 DIVISION 2, GROUPS A, B, C,
AND D, OR UNCLASSIFIED AREAS
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Quick Start Guide
SER-485-IR
Triple Isolated RS-422/485
Repeater
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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(-)
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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
