YOKOGAWA DT450G Series, User Manual, Page: 24 / 41

<3. Piping and Wiring>
3-3
IM 11K01C01-01E
3.2 Connecting the Wires for the Power Supply
CAUTION
The DT450G has no power switch. For reasons of safety during inspection and maintenance,
install a double-pole switch in the power line.
CAUTION
Since the DT450G may be removed for inspection or maintenance, allow each cable to have a
sufficient margin of length.
Connect a power supply that conforms to the voltage and frequency in the specifications of the
DT450G. For wiring, use a three-core cable of a 5 to 10 mm outside diameter with the nominal
cross-section of the conductor being at least 1.5 mm
2
. Ground one core appropriately. Lead the
cable from the power supply through the DT450G’s cable connection fitted with a Pg11 cable
gland into the DT450G’s inner assembly. Then, connect the cable to the AC1 terminal (non-
grounded side) and AC2 terminal (grounded side).
Terminate the end of the grounding wire with an M5 crimp terminal and then connect it to the
ground terminal inside the enclosure. The ground resistance should be 100 Ω or less (JIS Class
D grounding).
Note: The DT450G main unit and the duct on which the monitor is mounted are in electrical continuity. Should the measured value be
adversely affected by the method of two point grounding at the duct (see Section 3.4) and the terminal, remove either of the two
grounding lines.
Power Wiring.ai
AC power supply
Power Switch
Ground
AC1
AC2
Power Connector
N L
Figure 3.2 Wiring diagram of the DT450G to a power supply