MODEL: R3S-RS4A
Remote I/O R3 Series
RTD INPUT MODULE(high accuracy, 4 points, isolated, tension clamp terminalblock)27.5 (1.08)

130 (5.12)120 (4.72)
mm (inch)

Input: Separable tension clamp terminal (applicable wire
size: 0.2 to 1.5 mm2, stripped length 10 mm)
Internal power: Via the Installation Base (model: R3-BSx)
Isolation: Input 1 to input 2 to input 3 to input 4 to internalbus or internal power
Sensor type: Selectable with the side DIP SW
Temperature unit: °C or °F selectable with the side DIP SWConversion rate: Selectable with the side DIP SW
Burnout detection: Upscale or downscale selectable with theside DIP SW
Linearization: Standard
RUN indicator: Bi-color (red/green) LED;
Red when the bus A operates normally;
Green when the bus B operates normally;
Amber when both buses operate normally.
ERR indicator: Bi-color (red/green) LED;
Red with burnout; Green in normal operating conditions.

MODEL: R3S-RS4A[1][2]INPUT SPECIFICATIONSORDERING INFORMATION• Code number: R3S-RS4A[1][2]Specify a code from below for each of [1] and [2].
(e.g. R3S-RS4AW/Q)• Specify the specification for option code /Q(e.g. /C01/SET)NO. OF CHANNELS

Maximum leadwire resistance: 10 Ω per wire
Sensing current: ≤ 0.5 mA
Temperature range°C
RTD

CONFORMANCERANGE (°C)

BURNOUTVALUE (°C × 100)

Pt 100 (JIS ’97, IEC)
Pt 100 (JIS ’89)
JPt 100 (JIS ’89)
Pt 1000-50 to +200
-50 to +200
-50 to +200
-50 to +200

-24000, +32767-24000, +32767-23600, +32767-24000, +32767

RTD

CONFORMANCERANGE (°F)

BURNOUTVALUE (°F × 10)

Pt 100 (JIS ’97, IEC)
Pt 100 (JIS ’89)
JPt 100 (JIS ’89)
Pt 1000-58 to +392
-58 to +392
-58 to +392
-58 to +392

-4000, +6218-4000, +6218-3928, +6218-4000, +6218

4A: 4 channels, high accuracy°F[1] COMMUNICATION MODE
S: Single
W: Dual[2] OPTIONS
blank: none
/Q: Options other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to our web site.)/C01: Silicone coating/C02: Polyurethane coating/C03: Rubber coating
EX-FACTORY SETTING/SET: Preset according to the Ordering Information Sheet(No. ESU-8345)

GENERAL SPECIFICATIONSConnection
Internal bus: Via the Installation Base (model: R3-BSx)

INSTALLATION
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: Installation Base (model: R3-BSx)
Weight: 200 g (0.44 lb)

PERFORMANCE
Conversion accuracy: ±0.2°C or ±0.4°F
Conversion rate: 250 msec. or 1 sec. selectable
Data range°C: Engineering unit value × 100 (integer)°F: Engineering unit value × 10 (integer)
Data allocation: 4Current consumption: 70 mA

R3S-RS4A SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-8936 Rev.6 Page 1/4

MODEL: R3S-RS4A
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F)
Resolution: 0.03°C (0.1°F)
Burnout response time: ≤ 2 sec.
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @ 1 minute (input 1 to input
2 to input 3 to input 4 to internal bus or internal power)2000 V AC @ 1 minute (power input to FG; isolated on thepower supply module)

EXTERNAL VIEW
■ FRONT VIEW

■ SIDE VIEW

RUN LED

ERR LED
FunctionsSW314321ONConv.
8RateTemp. 76Unit
Burnout 54321SW1SW287654321

ONRTD
Input 2 (SW1)orInput 4 (SW2)
Input 1 (SW1)orInput 3 (SW2)ON

20

INPUT DATA DESCRIPTIONS■ ANALOG DATA (TEMPERATURE DATA)
16-bit binary data.
With °C temperature unit, raw data is multiplied by 100. For example, 25.5°C is converted into 2550.
With °F temperature unit, raw data is multiplied by 10. For example, 135.4°F is converted into 1354.
Minus temperature is converted into negative values, represented in 2’s complements.
150EXTERNAL DIMENSIONS unit: mm [inch]
120 (4.72)

130 (5.12)

27.5 (1.08)

109 (4.29)

POSITIONING
GUIDE

120

R3S-RS4A SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-8936 Rev.6 Page 2/4

MODEL: R3S-RS4A
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM
RUN LED ERR LED DIP SW

RTD

INPUT 1A

1B

2B

3A

5B

6B

7A

11B

12B

13INTERNAL BUS B*1

INTERNAL POWER

910Input Circuit

RTD

INPUT 4INTERNAL BUS A

Input Circuit

RTD

INPUT 3ControlCircuit
Input Circuit

RTD

INPUT 2CommunicationCircuit

BUS CONNECTOR

Input Circuit

A15B16B

17

SLD 4SLD 8
SLD 14
SLD 18SLD 19SLD*220*1. For dual redundant communication.
*2. To make use of shield line, connect to SLD and ground the terminal 20’s shield.
Note: Do not use void terminals.

• Unused Input Channels
Close across the unused input terminals with a resistor asshown below and set the DIP switch for Pt 100 input.
INPUT 1

INPUT 2

INPUT 3

INPUT 4151115261216371317100Ω

Unused channels left open are equal to the burnout, whichturns the red ERR LED on and sets a burnout flag at thePLC or the host device.
Unused channels can be specified and set so on the PC Configurator Software (model: R3CON) without needing to connect resistors at the field terminals.

R3S-RS4A SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-8936 Rev.6 Page 3/4

MODEL: R3S-RS4A
INPUT TERMINAL ASSIGNMENTPIN No.
1234567891011121314151617181920

FUNCTION
INA1
INB1
INb1
SLD
INA2
INB2
INb2
SLDNC
NC
INA3
INB3
INb3
SLD
INA4
INB4
INb4
SLD
SLD
SLD

Specifications are subject to change without notice.

R3S-RS4A SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-8936 Rev.6 Page 4/4