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Specifications
86
KW2M-A/X User's Manual
11.5 Demand monitor and control specifications
Demand type
IEC61557-12 requirement
1. Sliding block interval
2. Fixed block interval
3. Current demand
Power input type
Current transformer input
Pulse input (set in setting mode) *1
Demand span
1 to 60 min. (set in setting mode)
Measurement item
Present demand
Data update cycle
1 min.
Display
Present demand (active/ reactive/ apparent/
Active (export)/ reactive (export)/ current)
Saved data
Max.demand
*1 Only CH1 of main unit is available. Only current transformer input is available for CH2 of main unit and
expansion unit.
11.6 Communication Specifications
<RS485>
Interface
Conforming to RS485
Communication method
Half-duplex
Synchronous system
Synchronous communication method
Isolation status
Isolated with the internal circuits
Protocol
MEWTOCOL, MODBUS(RTU) (select in setting mode)
Number of connected unit
99 (max.) *1
Transmission distance
1200m *2
Transmission speed
115200, 57600, 38400, 19200, 9600, 4800, 2400bps
(select in setting mode)
Transmission
format
Data length
8 bit (fixed)
Parity
Not available / odd number / even number
(select in setting mode)
Stop bit
1bit, 2bit (select in setting mode)
*1 For RS485 converter on the computer side, we recommend SI-35 and SI-35USB (from LINE EYE
Co.,Ltd.). When using SI-35,SI-35USB or PLC from our company (which can be connected up to 99
units), up to 99 can be connected. In case using this system with the other devices, up to 31 can be
connected.
*2 Please check with the actual devices when some commercial devices with RS485 interface are
connected. The number of connected devices, transmission distance, and transmission speed may be
different according to using transmission line.
< Ethernet >
Port number
2 port
Interface
IEEE802.3u,100BASE-T/10BASE-TX
Connector shape
RJ45
Transmission
Transmission speed
100Mbps / 10Mbps
Transmission method
Base band
Max. segment length
100m
Transmission cable
UTP (Category 5)
Protocol (DNS, DHCP)
TCP/IP, UDP / IP
Web server
Setting
Functions
Auto-negotiation *1
MDI / MDI-X Auto-crossover
*1 With the auto-negotiation function, the transmission speed is changed automatically.