MODEL: LK1

LK1 SPECIFICATIONS

ES-6981 Rev.10 Page 2/2

http://www.m-system.co.jp/

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS 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.

9 10 11 12 13 14 15 16

1 2

3

4

5

6

7 8

MOUNTING REQUIREMENTS unit: mm (inch)

2–M5

60 (2.36)

■ M5 SCREWS

2–M4

60 (2.36)

■ M4 SCREWS

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

+

–

*Close across the terminal 4 – 5 when the LK1 unit is at an end of RS-485 transmission line.

TWISTED-PAIR

1

RS-485

Transceiver

2

4

5

U(+)

V(–)

POWER

9

10

RS-232C

Transceiver

Send/Xmit

Controller

3

2

1

4

5

6

20

7

RS

CS

DR

ER

SG1

SD

RD

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)

Isolation

Specifications are subject to change without notice.