MODEL: R3-MEX2
/C02: Polyurethane coating
Remote I/O R3 Series
/C03: Rubber coating
VALVE POSITIONER MODULE
(for 2 systems; built-in SSR)
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).
27.5 (1.08)
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.
130
(5.12)
109
(4.29)
mm (inch)
GENERAL SPECIFICATIONS
Connection
Internal bus: Via the Installation Base (model: R3-BSx)
Input, Output: M3 separable screw terminal
(torque 0.5 N·m)
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)
Internal power: Via the Installation Base (model: R3-BSx)
Screw terminal: Nickel-plated steel
Full-close position setting range:
0 - 25 % (factory default: 0 %)
• Specify the specification for option code /Q
(e.g. /C01)
Full-open position setting range:
75 - 100 % (factory default: 100 %)
Deadband adjustment:
0.1 – 8.0 % adjustable (factory default: 1.5 %)
Restart limiting timer:
VALVE POSITIONER
2: 2 systems
0.5 to 10 sec. (factory default: 2 sec.)
Motor deadlock detecting time:
FEEDBACK RESISTANCE
Potentiometer input
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
CONTROL OUTPUT
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.
Built-in SSR
[1] COMMUNICATION MODE
S: Single
W: Dual
[2] OPTIONS (multiple selections)
Standards & Approvals
blank: Without CE
INPUT SPECIFICATIONS
■ Feedback Potentiometer: 100 Ω – 10 kΩ
Minimum span: 50 % of total resistance
Excitation: Approx. 3.3 V DC
/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
R3-MEX2 SPECIFICATIONS
ES-8279 Rev.2 Page 1/4
https://www.m-system.co.jp/