M-system R7M-DC8C Instruction Manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN

Phone: +81(6)6659-8201  Fax: +81(6)6659-8510  E-mail: info@m-system.co.jp

EM-7803-U Rev.4  P. 1 / 7

INSTRUCTION MANUAL

RELAY CONTACT OUTPUT MODULE, 8 points

(Modbus)

MODEL

R7M-DC8C

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:

Discrete output 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 EU DIRECTIVES

•This equipment is suitable for Pollution Degree 2 and 

Measurement Category II (output, transition voltage 

1500V) with the maximum operating voltage 125V.

*1

  Ba-

sic insulation (output to power: 150V)

*2

 is maintained.  

Prior to installation, check that the insulation class of 

this unit satisfies the system requirements.

    *1.  For use in Measurement Category I (output, transition 

voltage 1500V) with the maximum operating voltage 

250V.

    *2. 

For use in Measurement Category I, 300V.

•The equipment must be mounted inside the instrument 

panel of a metal enclosure.

•Altitude up to 2000 meters.

•The equipment must be installed such that appropriate 

clearance and creepage distances are maintained to con-

form to CE requirements.  Failure to observe these re-

quirements may invalidate the CE conformance.

•The actual installation environments such as panel con-

figurations, connected devices and connected wires may 

affect the protection level of this unit when it is integrat-

ed 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.

■

POWER INPUT RATING & OPERATIONAL RANGE

•Locate the power input rating marked on the product and 

confirm its operational range as indicated below:

    24V DC rating: 24V ±10%, approx. 60mA

■

GENERAL PRECAUTIONS

•Before you remove the unit or mount it, turn off the power 

supply and output signal for safety.

■

ENVIRONMENT

•Indoor use.

•When heavy dust or metal particles are present in the 

air, install the unit inside proper housing with sufficient 

ventilation.

•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 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 

satisfying complete performance described in the data 

sheet.