0BPreparation
2-26
Preparation
Preparation
●
USB port
●
USB port
Connecting Model KM1 and a PC via a USB cable can make settings and read measurement
values. In addition, supplying power from a PC via USB (driving USB bus power) can make
settings only. For the functions available via a USB port, refer to the table below.
Connecting Model KM1 and a PC via a USB cable can make settings and read measurement
values. In addition, supplying power from a PC via USB (driving USB bus power) can make
settings only. For the functions available via a USB port, refer to the table below.
*1. For the USB cable, use mini-USB type B.
*1. For the USB cable, use mini-USB type B.
*2 If settings have been made via USB, remove the USB cable from the product, and then
supply the power to it. When reading measurement values via USB communication,
remove the USB cable once after the setting change, and then connect the product again.
*2 If settings have been made via USB, remove the USB cable from the product, and then
supply the power to it. When reading measurement values via USB communication,
remove the USB cable once after the setting change, and then connect the product again.
When one product is used
When one product is used
When multiple units are connected
When multiple units are connected
Without power
voltage
For all models, only settings can be
made.
Only the measurement master can be
set.
With power voltage
For all models, settings and reading of
measurement values can be performed.
Connecting the measurement master
can perform settings and reading of
measurement values. Settings of the
slave connected to the measurement
master and reading of the measurement
values can be performed.
*3 Connect the USB cable only when USB communication is required. If the USB cable is
always connected, and the power supply to the product is turned ON/OFF due to
instantaneous voltage drop, etc., the product cannot be started up normally to make
measurements.
*4 Do not carry out RS-485 communication during USB communication. (Doing so may return
a response.)
●
Input voltage
PMU1A
(Electric
power)
PMU2A
(Power
two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT
expansion)
○
× ×
: With input in 2 systems
O: With input X: Without input
Connect between terminals (21), (22), (23), and (24) in the measurement master. When
using PMU2A (power two-system) to make measurements of two systems, perform wiring
between terminals [9], [10], and [11]. However, PMU2A (power two-system) does not support
3-phase 4-wire.
* When wiring, avoid error in the order of phases. An error will cause incorrect
measurement.
[PMU1A (electric power)]
PMU2A (power two-system)]
Single
phase
2-wire
Single
phase
3-wire
3-phase
3-wire
3-phase
4-wire
Single
phase
2-wire
Single
phase
3-wire
3-phase
3-wire
P1
L R R R
1-P1
2-P1
⑨
L R R
P2
N N S S
1-P2
2-P2
⑩
N N S
P3
－
T T T
1-P3
2-P3
⑪
－
T T
P0
－
－
－
N
* Indication of voltage: V
[A][B]
: Indicates a voltage between [A] and [B].
Example: Vrs indicates a voltage between R and S.
