ES-6981 Rev.11
LK1
TRANSMISSION LEVEL CONVERTER
(NestBus/RS-232-C, RS-485/RS-232-C)
Functions & Features
• Bi-directional RS-232-C / RS-485 signal converter
• Suitable for applications that interface RS-232-C and RS-485
• Permits a computer to communicate with an MuNet or NestBus (RS-485)
MODEL: LK1-[1]-[2]
ORDERING INFORMATION
• Code number: LK1-[1]-[2]
Specify a code from below for each of [1] and [2].
(e.g. LK1-6-K)
[1] TRANSMISSION SPEED
1
: 300 bps
2
: 600 bps
3
: 1200 bps
4
: 2400 bps
5
: 4800 bps
6
: 9600 bps
7
: 19200 bps
8
: 38400 bps
[2] POWER INPUT
AC Power
K
: 85 – 132 V AC
(Operational voltage range 85 – 132 V, 44 – 66 Hz)
DC Power
R
: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
RELATED PRODUCTS
• Communication Controller (model: 25CU)
• MsysNet series NestBus related products
GENERAL SPECIFICATIONS
Construction
: Stand-alone; terminal access at the front
Connection
RS-232-C
: 25-pin D-sub connector (female)
(M2.6 x 0.45 connector screw)
RS-485, power input
: M3.5 screw terminals (torque 0.8 N·m)
Screw terminal
: Nickel-plated steel
Housing material
: Flame-resistant resin (black)
Isolation
: Transmission to power
COMMUNICATION
Communication
: Half-duplex, asynchronous, no procedure
■
RS-232-C
Standard
: Conforms to RS-232-C, EIA
Transmission distance
: 10 meters max.
Cable:
straight cable
■
RS-485
Standard
: Conforms to TIA/EIA–485–A
Transmission distance
: 500 meters max.
Transmission media
: Shielded twisted-pair cable (CPEV-S 0.9 dia.)
INSTALLATION
Power consumption
•
AC
: Approx. 5 VA
•
DC
: Approx. 30 mA
Operating temperature
: -5 to +55°C (23 to 131°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Surface or DIN rail
Weight
: 300 g (0.66 lb)
PERFORMANCE
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 500 V AC @ 1 minute (transmission to power to ground)
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
MOUNTING REQUIREMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM