Specifications
11.5 Demand monitor and control specifications
Demand type
Power input type
Demand span
Measurement item
Data update cycle
Display
Saved data
*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
Communication method
Synchronous system
Isolation status
Protocol
Number of connected unit
Transmission distance
Transmission speed
Data length
Transmission
Parity
format
Stop bit
*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
Interface
Connector shape
Transmission speed
Transmission
Transmission method
Max. segment length
Transmission cable
Protocol (DNS, DHCP)
Web server
Functions
*1 With the auto-negotiation function, the transmission speed is changed automatically.
86
IEC61557-12 requirement
1. Sliding block interval
2. Fixed block interval
3. Current demand
Current transformer input
Pulse input (set in setting mode) *1
1 to 60 min. (set in setting mode)
Present demand
1 min.
Present demand (active/ reactive/ apparent/
Active (export)/ reactive (export)/ current)
Max.demand
Conforming to RS485
Half-duplex
Synchronous communication method
Isolated with the internal circuits
MEWTOCOL, MODBUS(RTU) (select in setting mode)
99 (max.)
*1
1200m
*2
115200, 57600, 38400, 19200, 9600, 4800, 2400bps
(select in setting mode)
8 bit (fixed)
Not available / odd number / even number
(select in setting mode)
1bit, 2bit (select in setting mode)
2 port
IEEE802.3u,100BASE-T/10BASE-TX
RJ45
100Mbps / 10Mbps
Base band
100m
UTP (Category 5)
TCP/IP, UDP / IP
Setting
Auto-negotiation *1
MDI / MDI-X Auto-crossover
KW2M-A/X User's Manual