Yokogawa Standalone MW100 - Manual (Page 111)

2-23 IM MW100-01E
Installation and W
iring
1
2
3
4
5
App
Index
When Using a DC Power Supply
WARNING
• To prevent the possibility of electric shock when wiring, confirm that the power
supply source is turned OFF.
• To avoid electric shock or fire, use electric wires having a cross sectional area of
0.3 mm2 (AWG 22) or more.
1. Check that the power supply and the power switch of the main module is OFF.
2. Loosen the screw fixing the power supply terminal cover of the main module in
place and open the power supply terminal cover.
3. Following the wiring diagram (see “When Using an AC Adapter” in this section),
wire the plus/minus wires from the DC power supply and the protective grounding
wire to the power supply terminal.
4. Close the power supply terminal cover and secure it with the screw.
Use a power supply that meets the conditions indicated below.
Item Specifications
Rated supply voltage 12 to 28 VDC
Supply voltage range used DC power supply: 10 to 32 VDC
Maximum power consumption Up to approximately 35 VA maximum when six modules are
used
Turning the Power Switch ON and OFF
Pressing the “I” side of the power switch turns the instrument ON. Pressing the “O” side
turns the instrument OFF.
When turned ON, the 7-segment LED (see section 1.3, “Functions of the Main Module”
illuminates. When the self check and other processes are complete, the unit number is
displayed.
Note
• Before turning the power ON, check that the modules are attached correctly and that the
power cord is connected correctly.
• If the 7-segment LED does not illuminate even if the power switch is turned ON, turn OFF
the power switch, then check the items below. If the condition does not change when turning
ON the power even after checking those items, it is probably a malfunction. Contact your
nearest YOKOGAWA dealer for repairs.
• That the power cord is plugged in properly.
• That the power supply voltage is within the allowable voltage range specified in this
section
• If the 7-segment LED displays something other than a unit number when the power switch
is turned ON, see section 4.1, “Error Display on the 7-Segment LED and Corrective Actions”
and carry out the specified corrective action. If the displayed information does not change
even when you carry out the corrective action, it is probably a malfunction. Contact your
nearest YOKOGAWA dealer for repairs.
2.5 Connecting the Power Supply and Turning the Power Switch ON and OFF