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R3-GM1

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EM-8463 Rev.1

MODBUS INTERFACE MODULE

MODEL

R3-GM1

INSTRUCTION MANUAL

BEFORE USE ....

Thank you for choosing M-System.  Before use, please check 
contents of the package you received as outlined below.
If you have any problems or questions with the product, 
please contact M-System’s Sales Office or representatives.

 PACKAGE INCLUDES:

  Network interface module  ........................................... (1)
  Terminating resistor (110Ω, 0.25W) ............................ (1)

 MODEL NO.

Confirm Model No. marking on the product to be exactly 
what you ordered.

 INSTRUCTION MANUAL

This manual describes necessary points of caution when 
you use this product, including installation, connection and 
basic maintenance procedures.

POINTS OF CAUTION

 CONFORMITY WITH EC DIRECTIVES

• The  equipment  must  be  mounted  inside  the  instrument 

panel of a metal enclosure.

• The actual installation environments such as panel con

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figurations, connected devices and connected wires may 
affect the protection level of this unit when it is integrated 
in a panel system.  The user may have to review the CE 
requirements in regard to the whole system and employ 
additional protective measures to ensure CE conformity.

 UNPLUGGING THE MODULE

Before you remove the module from its base or mount it, 
turn off the power supply for safety.

 ENVIRONMENT

• Indoor use
• When heavy dust or metal particles are present in the air, 

install the unit inside proper housing with sufficient ven-
tilation.

• Do not install the unit where it is subjected to continuous 

vibration.  Do not subject the unit to physical impact.

• Environmental temperature must be within -10 to +55°C 

(14 to 131°F) with relative humidity within 30 to 90% RH 

in order to ensure adequate life span and operation.

 WIRING

• Do  not  install  cables  (power  supply,  input  and  output) 

close to noise sources (relay drive cable, high frequency 
line, etc.).

• Do  not  bind  these  cables  together  with  those  in  which 

noises are present.  Do not install them in the same duct.

 AND ....

The unit is designed to function as soon as power is sup-
plied, however, a warm up for 10 minutes is required for sat-
isfying complete performance described in the data sheet.

INSTALLATION

Use  the  Installation  Base  Model:  R3-BSx,  or  Model:  R3-

BSWx for free I/O address capability.

Before  mounting  the  Network  Interface  Module  R3-GM1 

onto the base, be sure to configure the module as explained 
below.

 DATA ALLOCATION

Use the side DIP SW1 to set the number of slots which the 

module is assigned to.

See “TRANSMISSION DATA DESCRIPTIONS.”

 NODE ADDRESS & BAUD RATE

See “COMPONENT IDENTIFICATION.”

 NETWORK SLOTS ON THE BASE

With Model R3-BSx base, mount the I/O Modules from the

left end (I/O 1) to the right in order that the Network Mod-
ule assigns data areas from I/O 1.

Network  Module(s)  and  Power  Module  are  mounted  basi

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cally at the right end though technically they could be 
mounted in any position.

With Model R3-BSWx base, there is no limitation in mount

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ing positions as I/O address can be assigned freely to each 
module using rotary switches equipped on the base.
It is available to assign the module to max. 8 slots.  The as-
signed slots numbers can not be used again for the real I/O 

modules which need to be mounted on the same base.  Don’t 

set the interface module for more than 16 slots as it can not 
read the data for more than 16 modules.

I/O 1

I/O 2

I/O n

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