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INSTRUCTION MANUAL
TRANSMISSION LEVEL CONVERTER
(NestBus/RS-232-C, RS-485/RS-232-C)

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:
Transmission level converter .............................................(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
■ POWER INPUT RATING & OPERATIONAL RANGE
• Locate the power input rating marked on the product and
confirm its operational range as indicated below:
85 – 132V AC rating: 85 – 132V, 44 – 66 Hz, approx. 5VA
24V DC rating: 24V ±10%, approx. 30mA
■ GENERAL PRECAUTIONS
• Before you remove the unit 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
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 -5 to +55°C
(23 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.
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
MODEL

COMPONENT IDENTIFICATION

Specifications

INSTALLATION

■ DIN RAIL MOUNTING

Set the unit so that its DIN rail adaptor is at the bottom.
Position the upper hook at the rear side of the unit on the
DIN rail and push in the lower. When removing the unit,
push down the DIN rail adaptor utilizing a screwdriver (–)
and pull.
■ WALL MOUNTING unit: mm (inch)
M5 SCREWS
60 (2.36)
M4 SCREWS
60 (2.36)
LK1
Body
DIN Rail
35mm wide
Spring Loaded
DIN Rail Adaptor
2–M5
2–M4
EM-6981 Rev.5 P. 1 / 2

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Summary of Contents for M-system LK1

  • Page 1 TRANSMISSION LEVEL CONVERTER MODEL (NestBus/RS-232-C, RS-485/RS-232-C) BEFORE USE ..COMPONENT IDENTIFICATION Thank you for choosing M-System. Before use, please check Specifications contents of the package you received as outlined below. Body If you have any problems or questions with the product, please contact M-System’s Sales Office or representatives.
  • Page 2 POWER V(–) unit is at the end of a transmission loop. *Close across the terminal 4 – 5 when the LK1 unit is at an end of RS-485 transmission line. LIGHTNING SURGE PROTECTION M-System offers a series of lightning surge protector for protection against induced lightning surges.

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