ES-8331 Rev.7

R3-NM4

Remote I/O R3 Series

MODBUS INTERFACE MODULE

(for 115.2 kbps)

MODEL: R3-NM4-[1][2]

ORDERING INFORMATION

• Code number: R3-NM4-[1][2]
Specify a code from below for each of [1] and [2].
  (e.g. R3-NM4-M2/Q)
• Specify the specification for option code /Q
  (e.g. /C01/SET)

[1] POWER INPUT

N: No power supply
AC Power
M2: 100 – 240 V AC (Operational voltage range 85 – 264 V,
 47 – 66 Hz)*
DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.) *
* Not selectable for use with independent power modules or network modules with the internal power input options.

[2] OPTIONS

blank: none
/Q: With options (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-8331)

PACKAGE INCLUDES...

• Terminating resistor (110 Ω, 0.25 W)

GENERAL SPECIFICATIONS

Connection
 Modbus
: Euro type connector terminal
 (applicable wire size: 0.2 to 2.5 mm2, stripped length 7 mm)
 Internal bus: Via the Installation Base 
 (model: R3-BSx)
 Internal power: Via the Installation Base (model: R3-BSx) 
 Power input, RUN contact output: M3 separable screw terminal (torque 0.5 N·m)
Screw terminal: Nickel-plated steel
Isolation: Modbus to internal bus or internal power to power input to RUN contact output to FG
Input error data: Input value setting at input module error with side DIP SW
Main/Sub switching control in dual communication mode: Selectable with the side DIP SW (refer to the manual)
Dual communication setting: Set with the side DIP switch
Data allocation setting: Set with the side DIP switch
RUN indicator: Bi-color (green/red) LED; Green ON in normal communication; Red ON when receiving data (Function selected with DIP SW)
ERR indicator: Bi-color (green/red) LED; green ON at data receiving error (blinking with configuration error); Red ON at EEPROM error; Red blinks when transmitting data (Function selected with DIP SW)
RUN CONTACT OUTPUT
RUN contact: Turns ON while the green RUN LED is ON (Modbus in normal communication).
Rated load: 250 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 0.5 A (resistive load)
Maximum switching voltage: 250 V AC or 30 V DC
Maximum switching power: 250 VA or 150 W
Minimum load: 1 V DC @ 1 mA
Mechanical life: 2 × 107 cycles (300 cycles/min.)
When driving an inductive load, external contact protection and noise quenching recommended.

MODBUS COMMUNICATION

RS-485
  Standard
: Conforms to TIA/EIA-485-A
  Transmission distance: 500 meters max.
  Transmission media: Shielded twisted-pair cable
  (CPEV-S 0.9 dia.)
Supported function codes: 01, 02, 03, 04, 05, 06,
08, 11, 12, 15, 16, 17 (total of 12 types)
Transmission setting: DIP switch (front)
  Data: RTU (Binary) or ASCII
  Parity: None, even or odd
  Baud rate: 300, 600, 1200, 2400, 4800, 9600, 14.4 k,
  19.2 k, 28.8 k, 38.4 k, 57.6k, 115.2 k (bps)
Node address: Rotary switch; 01 – F7

INSTALLATION

Power consumption
AC:
 Approx. 20 VA at 100 V
 Approx. 28 VA at 200 V
 Approx. 30 VA at 240 V
DC: Approx. 12 W
Current consumption (no power supply): 70 mA
Output current (power supply): 280 mA continuous at 20 V DC; 430 mA for 10 minutes
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

Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @ 1 minute (Modbus to internal bus or internal power to power input to RUN contact output to FG)

EXTERNAL VIEW

COMMUNICATION CABLE CONNECTIONS

MODBUS FUNCTION CODES & SUPPORTED CODES

MODBUS I/O ASSIGNMENT

TRANSMISSION DATA DESCRIPTIONS

MODULE STATUS, ERROR STATUS, DATA ERROR STATUS

I/O DATA DESCRIPTIONS

The data allocations for typical I/O modules are shown below.
Refer to the manual for each module for detailed data allocations.
■ ANALOG DATA (16-bit data, models: R3-SV4, YV4, DS4, YS4, US4, etc.)
■ TEMPERATURE DATA (16-bit data, models: R3-RS4, TS4, US4, etc.)
■ ANALOG DATA (16-bit data, models: R3-CT4A, CT4B, etc.)
■ ACCUMULATED COUNT DATA (32-bit data, models: R3-PA2, PA4A, WT1, WT4, etc.)
■ BCD DATA (32-bit data, models: R3-BA32A, BC32A, etc.)
■ 16-POINT DISCRETE DATA (models: R3-DA16, DC16, etc.)

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

Caution: FG terminal is NOT a protective conductor terminal.