B-526-10N-E
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8. WIRING INSTRUCTIONS
(Refer also to the wiring instructions of respective receiving
instrument instruction manual.)
8.1 Field Wiring
(1) Cables for field wiring
The following cables should be used unless otherwise specified:
Cables 1.25mm2 in conductor area and 8.5 to 12 mm in finished O.D. As to the number of conductors, select 2
to 4 according to your particular application. It is recommended that their shield be grounded at the receiving
instrument.
CAUTIONS: Standard ULTRA register; In case of TIIS explosionproof type used under
the ambient temperature of 45
℃
or higher, use a cable resistant to the
temperature of 75
℃
or higher.
Smart Type ULTRA register; In case of TIIS explosionproof type used under
the ambient temperature of 50
℃
or higher, use a cable resistant to the
temperature of 70
℃
or higher.
(2) Transmission length
The maximum transmission length is typically one kilometer.
NOTE:
If it exceeds one kilometer, consult the factory.
(3) Inductive interference prevention
To minimize the possibility of stray current pickup, the field wiring should be routed sufficiently away from
existing power cables or power circuits.
(4) Precautions about Wiring Connections
①
The terminal block has M3.5 screw posts; use crimp-type terminal lugs that fit snugly over cable end.
②
Do not fail to earth ground the preamplifier GND terminal.
③
The cable should extend downward from cable entrance to prevent rainwater from traveling along it and
entering the equipment.
④
If lightning strikes are anticipated, provide a surge arrestor.
Summary of Contents for ULTRA UF-II
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