MODEL: R8-SS4NJ
Remote I/O R8 Series

GENERAL SPECIFICATIONSDC CURRENT INPUT MODULE(built-in excitation, 4 points, non-isolated)
Functions & Features• Accepts direct input from DC signal, compact size remote
I/O module• Accepts direct input from power output as sensor power
and outputs from terminals
12 [.47]

115 [4.53]

59 [2.32]mm [inch]

Connection•Input: 4-pin e-CON connector
Unit side connector XN2D-1474-S002 (Omron)
Recommended cable side connector XN2A-1470 (Omron)Applicable wire size 0.08 - 0.5 mm2 (AWG28 - 20)
Outer sheath diameter: max. 1.5 dia(The cable side connector is not included in the package.
Refer to the specifications of the product.)•Excitation supply, internal bus:
Connected to internal bus connector•Internal power: Supplied from internal bus connector
Isolation: Input to exc. supply to internal bus or internal
power
Input range: Selectable with the side DIP SW
Module address: With rotary switch
Terminating resistor: Built-in (DIP Switch, default: disable)
Configuration mode: With DIP switches on the side panel
Status indicator: Bi-color (red/green) LED; Refer to theinstruction manual.
Input status indicators: Red LED; Refer to the instruction
manual.

MODEL: R8–SS4NJ[1]INPUTORDERING INFORMATION

Input range: -20 – +20 mA DC configurable
Input range: -5 - +105 % (in percentage of input range)
Input resistance: 50 Ω

• Code number: R8-SS4NJ[1]Specify a code from below for [1].
(e.g. R8-SS4NJ/Q)• Specify the specification for option code /Q(e.g. /C01)

INSTALLATION
Max. current consumption: 80 mA
Operating temperature: -10 to +55°C (14 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Atmosphere: No corrosive gas or heavy dust
Mounting: DIN rail
Weight: 60 g (2.12 oz)[1] OPTIONS
blank: none
/Q: With options (specify the specification)

SPECIFICATIONS OF OPTION: Q

PERFORMANCE

COATING (For the detail, refer to our web site.)/C01: Silicone coating/C02: Polyurethane coating

RELATED PRODUCTS• PC configurator software (model: R8CFG)
Downloadable at our web site.
A dedicated cable is required to connect the module to thePC. Please refer to the internet software download site or
the users manual for the PC configurator for applicable
cable types.

Conversion accuracy (in percentage of input range)±0.1 % (@ input range -20 - +20 mA)
Conversion accuracy is inversely proportional to input span.
Conversion accuracy computation example:
When input range is 4 - 20 mA: conversion accuracy =nominal input span (40 mA) ÷ input span (16 mA) × 0.1(%)= 0.25 (%).
Nominal input span is the same as the span at input range-20 - +20 mA DC.
Conversion rate: 4 msec. @ 4 input
Input circuit time constant: Approx. 1 msec.
Data range: 0 – 10000 of the input range
Data allocation: 2
Module addresses in use: 2R8-SS4NJ SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-9732 Rev.6 Page 1/4

MODEL: R8-SS4NJ
Power output (input connector): Rated current 0.5 A DC perchannel (rated current 3 A for internal fuse (slow blow fusei2t (A2sec.) max. 5.04); Total: 1 A DC
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F)
Insulation resistance: ≥ 100 MΩ with 250 V DC
Dielectric strength: 300 V AC @1 minute(input to exc. supply)
1500V AC @1 minute(input or exc. supply to internal bus or internal power toground)

STANDARDS & APPROVALS
EU conformity:
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive

EXTERNAL VIEWFRONT VIEW

LEFT SIDE VIEW

RIGHT SIDE VIEW
Module Address Setting
Rotary SW
Status Indicator LED

787878456

456

23

CARD ADD.

x10

2378

456

901

23

Input Indicator LED
901

23

RUN

901

901

SW1SW2x1

Function Setting
DIP SW

456

Internal Bus Connector

OnAI̲I1SW412345678Input Connectors
OnTermShort across grounds

JP1SHORTSW3

AI_I1

Terminator DIP SW

AI_I2

OPEN

SHORT ACROSS GROUNDS
Choose to open or short across grounds of excitation supply and input.
In case of shorting across, insert short-plug in the center pin of JP1 and SHORT side.
In case of opening, insert short-plug in the center pin of JP1 and OPEN side.
Factory default is on SHORT side.

R8-SS4NJ SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-9732 Rev.6 Page 2/4

MODEL: R8-SS4NJOPERATING MODE SETTING(*) Factory setting
Caution ! - SW4-3 through 4-7 are unused. Be sure to turnoff unused ones.
■ Module Address
The left switch determines the tenth place digit, while theright one does the ones place digit of the module address.
Address is selected between 0 to 30.
(Factory setting: 0)901
7 823456

23

7 8901456

Module Address Setting (x1)
Module Address Setting (x10)■ Input Range
Same range for all channels. Use PC Configurator to set
independent ranges per channel.
SW4INPUT RANGE

1
OFFON

0 – 20 mA DC
4 – 20 mA DC (*)

2OFFOFF■ Configuration Mode
CONFIGURATION MODE

SW48

DIP switch setting (*)

OFF

PC Configurator and communication

ON■ Terminator DIP SW

TERMINATOR SW

SW3OFFONWithout (*)
With6 [.24] 7 [.28]

EXTERNAL DIMENSIONS unit: mm [inch]
12 [.47](3 [.12])59 [2.32](4 [.16])55 [2.17]

7 [.28] 6 [.24]

115 [4.53]

DIN RAIL(35 mm wide)

R8-SS4NJ SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-9732 Rev.6 Page 3/4

MODEL: R8-SS4NJSCHEMATIC CIRCUITRY & CONNECTION DIAGRAM
INPUTSTATUS STATUS
IND.
IND.

*1INPUT CONNECTOR 124V

1AI12AG3+24V

EXC. SUPPLYIsolationComm.
CircuitControlCircuit

0V

INPUT 10V

PowerCircuit

SETTINGSW

4BUS CONNECTOR+24V

INTERNAL BUS

INTERNAL POWERINPUT CONNECTOR 224V

1AI22AG

30V

4INPUT 2A/DConversion

INPUT CONNECTOR 324V

1AI32AG

30V

4INPUT 3INPUT CONNECTOR 424V

1AI42AG

30V

4INPUT 40V

JP1*1. Fuse is not replaceable.

■ INPUT CONNECTION• When Used as DC Current Input
JP1 can be open or short.

2-WIRE
TRANSMITTER+NC 1+ 2INPUT• When Used as DC Supply
Short the JP1.

–+ 1– 250Ω

50Ω

– 3

NC 3

NC 4

NC 4Specifications are subject to change without notice.

R8-SS4NJ SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-9732 Rev.6 Page 4/4