2.5 Wiring
2-25
Preparation
2.5 Wiring
■
Requests for wiring
x
Do not change the terminal screws, but use existing screws.
x
To prevent being affected by noise, wiring of signal line should be different from that of power
line.
x
Cable to be used for wiring terminals excepting CT should be twist pair AWG25 (whose
cross-sectional area is 0.205 mm2) to AWG12 (whose cross-sectional area is 3.309 mm2).
x
For circuits in use, select appropriate cables.
x
When connecting dedicated CT, use the cable for dedicated CT (Model KM20-CTF-CB3: 3
m).
When doing so, connect the shrinkable tube side to the dedicated CT.
x
For RS-485 connection, the total cable length is up to 500 m.
x
Do not ground the dedicated CT or RS-485 signal line. Doing so causes a failure.
x
For the terminal section, carry out wiring by using a solderless terminal.
x
Use wiring materials and crimp tools that are suitable for the solderless terminal.
x
Tighten a terminal screw to the torque of 0.69 to 0.88 N
x
m.
x
For a solderless terminal, use the M3.5 terminal whose shape is as follows.
7.2mm以下
7.2mm以下
■
Wiring
●
Power voltage
PMU1A
(Electric
power)
PMU2A
(Power
two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT
expansion)
○
○
○
×
O: With input X: Without input
Connect between terminals [1] and [2].
The specifications are as follows.
Power voltage
Consumed power
AC100
～
240 V (50/60
Hz)
Measurement master : 10 VA or less for
independent behavior.
14 VA or less at the time of maximum
expansion
Functional slave
: 10 VA or lower
Less than 7.2 mm
Less than 7.2 mm
