Yokogawa DA100 - Manual (Page 42)

IM DA100-01E 2-21
2
Installation and Wiring
2.6 Connecting the Signal Lines
Wiring AC Input Signal Lines (Power Monitor Module)
WARNING
• For hazard prevention, ALWAYS provide protective grounding before
connecting measuring leadwires.
• When connecting any object being measured, ALWAYS turn off the
power to the object. It is extremely dangerous to connect or disconnect
interconnecting leadwires with the power to the object left on.
• Exercise utmost care to avoid connecting any current-mode circuit to a
voltage-input terminal or any voltage-mode circuit to a current-input
terminal. Wrong connection may result in damage to the circuit or
equipment being measured or the DA100 recorder itself, as well as
bodily injury.
• Fuses are not built into voltage- and current-input terminals. ALWAYS
install a fuse on the interconnecting leadwire. Use a fuse that will not
permit the voltage or current being measured to exceed the maximum
ratings of an AC input module.
The maximum voltage and current that can continuously be imposed on
an AC input module are as follows:
Voltage: 250 Vrms; current: 5 Arms
• To avoid electrical shock, ALWAYS attach the terminal cover in place
after the completion of wiring to the terminals so that the terminals
cannot be accidentally touched.
CAUTION
• In wiring, use double-insulated leadwires that have sufficient
withstanding-voltage and current-carrying-capacity margins against the
voltage and current being measured and meet the ratings at which they
are used.
• ALWAYS clamp measuring leadwires with the wire clips to prevent the
wires from being disconnected from their terminals. As the measuring
leadwires, use wires 0.2 to 2.5 mm2 (AWG14 to 25) thick so they can
be fastened securely with the wire clips.
• The power monitor module is a product belonging to Installation (Over-
voltage) Category CAT II.
Diagram of Terminal Block
V1
I1
V1
I1
V2
I2
V3
I3
Wire clip
Single-phase Model Three-phase Model
Wire clip
Wire clip
9mm
• Strip 9 mm of insulation off the leadwire.
• ALWAYS clamp the leadwire with the wire
clip.
• The recommended torque for fastening the
wire clip screw is 0.4 to 0.5 N•m.