IMSRM52-E4
23
4. WIRING
4.1 Wiring of H-PCP-G Module
Power supply wiring:
Use a power supply is within the power supply voltage variation range.
For power supply wires, use twisted wires with low voltage drop.
Provide separate power supply for this instrument independent of other input/output
circuits, motors, equipment and operating circuits.
If a noise source is near the instrument and could affect the instrument, use a noise filter.
−
Shorten the distance between twisted power supply wire pitches. The shorter the
distance between the pitches, the more effective for noise reduction. In addition,
always ground noise filter.
−
Always install the noise filter on the grounded panel. Also minimize the wiring distance
between the noise filter output side and instrument power supply terminals to ensure
the effectiveness of the noise filter.
−
Do not connect fuses or switches on the wiring of the noise filter output side, since
these may reduce the effectiveness of the noise filter.
−
To obtain a satisfactory noise filter effect, select the most suitable type after due
consideration of instrument power supply voltage and filter frequency characteristics.
To the instrument with power supply of 24 V, please be sure to supply the power from
SELV circuit.
Input/output wiring:
Use independent ducts for the input/output wires and electric equipment power circuits
inside and outside the panel.
If input/output wires have to be placed in the same duct as the power circuits, use
shielded wires. Also ground the shield to reject any noise generated by the floating
capacitance between the cores and shield or by a grounding potential.
Grounding-wire wiring:
Do not ground the instrument together with other equipment.
Ground the instrument separately from other equipment so that its grounding resistance
is 100
Ω
or less.
Use grounding wires with a cross section of 2.0 mm
2
or more.
FAIL output wiring:
Configure the FAIL output in the external relay circuit so that a failure or error in the
instrument does not affect the entire system, and configure an emergency stop circuit.
CAUTION
To prevent electric shock or instrument failure, do not turn on the power until all
the wiring is completed.
WARNING
!
