M-system LK1 User manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-6981 Rev.5 P. 1 / 2
INSTRUCTION MANUAL
TRANSMISSION LEVEL CONVERTER
(NestBus/RS-232-C, RS-485/RS-232-C) MODEL LK1
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.
COMPONENT IDENTIFICATION
Specifications
Body
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.
DIN Rail
35mm wide
Spring Loaded
DIN Rail Adaptor
■WALL MOUNTING unit: mm (inch)
2–M5
60 (2.36)
60 (2.36)
■M5 SCREWS
2–M4
60 (2.36)
50 (1.97)
■M4 SCREWS

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
LK1
EM-6981 Rev.5 P. 2 / 2
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the connection diagram on the front of the unit.
■EXTERNAL DIMENSIONS unit: mm (inch)
112 (4.41) [3.3 (.13)]
DIN RAIL
35mm wide
8 (.31) M3.5 SCREW
(Only on the used terminals)
75 (2.95)
TERMINAL
COVER
2–5.8 (.23) dia. or
2–4.8 (.18) dia.
MTG HOLE
8 (.31) deep
•When mounting, no extra space is needed between units.
75 (2.95)
910111213141516
12 345678
3 (.12)1(.04)
■CONNECTION DIAGRAM
+
–
*Close across the terminal 4 – 5 when the LK1 unit is at an end of
RS-485 transmission line.
TWISTED-PAIR
1
2
4
5U(+)
V(–)
POWER
9
10
3
2
1
4
5
6
20
7
RS
CS
DR
ER
SG1
SD
RD
3
Terminator*
SG
GROUND
TRANSMITED DATA
RECEIVED DATA
REQUEST TO SEND
CLEAR TO SEND
DCE READY
DTE READY
SIGNAL GROUND
All other terminal numbers
are left unused.
RS-232-C 25-pin
D-sub Connector (female)
WIRING INSTRUCTIONS
■SCREW TERMINAL
Torque: 0.8 N·m
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
9 – 10 with a multimeter.
3) Check the twisted-pair cable: CPEV-S, 0.9 dia. minimum
(shielded)
4) Be sure to short across the terminal 4 – 5 when the LK1
unit is at the end of a transmission loop.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.