MODEL: R3-US4

R3-US4 SPECIFICATIONS

ES-8449 Rev.7 Page 1/7

http://www.m-system.co.jp/

Remote I/O R3 Series

UNIVERSAL INPUT MODULE

(4 points, isolated)

109

(4.29)

27.5 (1.08)

130

(5.12)

mm (inch)

MODEL: R3-US4[1][2]

ORDERING INFORMATION

• Code number: R3-US4[1][2]

Specify a code from below for each of [1] and [2].

(e.g. R3-US4W/A/Q)

• Specify the specification for option code /Q

(e.g. /C01/SET)

Factory default setting

Input: DC voltage, ±12 V

Temperature unit: °C

Burnout: Upscale

CJC: ON

NO. OF CHANNELS

4: 4

[1] COMMUNICATION MODE

S: Single

W: Dual

[2] OPTIONS (multiple selections)

Temperature input accuracy

blank: Standard

/A: High accuracy

Other Options

blank: none

/Q: Option other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q

COATING (For the detail, refer to M-System's web site.)

/C01: Silicone coating

/C02: Polyurethane coating

/C03: Rubber coating

EX-FACTORY SETTING

/SET: Preset according to the Ordering Information Sheet

(No. ESU-8449)

RELATED PRODUCTS

• PC configurator software (model: R3CON)

Downloadable at M-System’s web site.

A dedicated cable is required to connect the module to the

PC. Please refer to the internet software download site or

the users manual for the PC configurator for applicable

cable types.

GENERAL SPECIFICATIONS

Connection

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

Input: M3 separable screw terminal (torque 0.5 N·m)

Internal power: Via the Installation Base (model: R3-BSx)

Screw terminal: Nickel-plated steel

Isolation: Input 1 to input 2 to input 3 to input 4 to internal

bus or internal power

Input range: Selectable with configuration software (model:

R3CON)

Temperature unit (Thermocouple or RTD input): Selectable

with PC configuration software (model: R3CON)

Burnout for T/C and RTD input: Upscale, downscale or no

burnout selectable with PC configurator software

Select “No burnout” to minimize the measuring errors

caused by the sensor/wire resistance and the burnout

sensing current. With RTD input, the signal may go

transiently to the opposite direction from the burnout

setting.

Burnout is not detected at DC voltage or potentiometer

input. The burnout sensing current is turned off.

Cold junction compensation (CJC) for T/C input: CJC is

selectable whether enabled or disabled by using the PC

configurator software. The cold junction sensor is mounted

to the terminal of each channel.

A/D conversion mode: (Temp. input accuracy: standard)

Low or middle conversion rate selectable with PC

configurator software

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.

INPUT SPECIFICATIONS

■ DC Voltage

Input resistance: ≥ 600 kΩ