MODEL: R3-MEX2

R3-MEX2 SPECIFICATIONS

ES-8279 Rev.2 Page 1/4

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

Remote I/O R3 Series

VALVE POSITIONER MODULE

(for 2 systems; built-in SSR)

109

(4.29)

27.5 (1.08)

130

(5.12)

mm (inch)

MODEL: R3–MEX2[1][2]

ORDERING INFORMATION

• Code number: R3-MEX2[1][2]

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

(e.g. R3-MEX2W/CE/Q)

• Specify the specification for option code /Q

(e.g. /C01)

VALVE POSITIONER

2: 2 systems

FEEDBACK RESISTANCE

Potentiometer input

CONTROL OUTPUT

Built-in SSR

[1] COMMUNICATION MODE

S: Single

W: Dual

[2] OPTIONS (multiple selections)

Standards & Approvals

blank: Without CE

/CE: CE marking

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

CAUTION

This unit is not designed to be used with the following types

of interface modules (models: R3-NC2, R3-NEIP1, R3-NFx,

R3-NLx).

Please use this unit with interface modules (models: R3-

NC1, R3-NC3, R3-NDx, R3-NE1, R3-NFL1, R3-NM1, R3-NM4,

R3-NP1) of firmware version V2.00 or higher, and interface

modules (models: R3-NM3, R3-NML3) of firmware version

V1.00 or higher.

GENERAL SPECIFICATIONS

Connection

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

Input, Output: M3 separable screw terminal

(torque 0.5 N·m)

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

Screw terminal: Nickel-plated steel

Full-close position setting range:

0 - 25 % (factory default: 0 %)

Full-open position setting range:

75 - 100 % (factory default: 100 %)

Deadband adjustment:

0.1 – 8.0 % adjustable (factory default: 1.5 %)

Restart limiting timer:

0.5 to 10 sec. (factory default: 2 sec.)

Motor deadlock detecting time:

60 – 1000 sec. (factory default: 120 sec.)

Isolation: Cotrol output 1 to control output 2 to feedback

potentiometer 1 or feedback potentiometer 2 or internal bus

or internal power

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: Green LED turns on in normal operating

conditions.

INPUT SPECIFICATIONS

■ Feedback Potentiometer: 100 Ω – 10 kΩ

Minimum span: 50 % of total resistance

Excitation: Approx. 3.3 V DC