107
8.
Appendices
8.1 Specifications (continued)
■
Input specifications
* You cannot use the CT dedicated for use with the Omron KM series (model series KM-NCT, model series KM20-
CTF, etc.). Use a generic CT whose secondary output is 1A or 5A.
■
Output specifications
■
Measurement specifications
* This does not include the measuring error margin of the generic CT.
**IEC62053 is an international standard dealing with electricity metering.
Item
Description
Applicable circuit type
3-phase 4-wire, 1-phase 2-wire, 1-phase 3-wire, 3-phase 3-wire
Number of measuring
circuits
3-phase 4-wire
: maximum of 1 circuit
1-phase 2-wire:
: maximum of 4 circuits
1-phase 3-wire, 3-phase 3-wire
: maximum of 2 circuits
Connectable CTs
Generic CT (secondary rating: 1A/5A)*
CT secondary side rated
current
1A
Maximum current for CT
secondary side
6A
Item
Description
Pulse output
(Active energy)
Number of output points
: 4 (PhotoMOS relay outputs)
Output capacity
: DC40V, 50mA or less
Residual voltage when ON
: Less than 1.5V (when output current is 50mA)
Current leakage when OFF
: 0.1mA maximum
Output units
: 1,10,100,1k,5k,10k,50k,100k (Wh)
Pulse ON time
: 500ms fixed
RS-485
Protocol
: Modbus(RTU), CompoWay/F
Sync method
: Asynchronous
Communication speed
: 38400, 19200, 9600, 4800, 2400, 1200bps
Maximum transmission
distance
: 1200m
Maximum number of devices
connected
: 99 (Modbus), 31 (CompoWay/F)
Item
Description
Active power
0.5%* (IEC62053-22 class 0.5S) **
Reactive power
2% *(IEC62053-23 class 2) **
Measurement frequency
80ms (at 50Hz), 66.7ms (at 60Hz)
Functions
Simple measurement, conversion
