ABUS Technologies USI Universal Smart Isolator - Manual (Page 8)

ABUS TECHNOLOGIES INC.
8
USI
5. CONNECTIONS
1. For thermocouple input, use the specified comenssation wire.
2. For RTD input, use leads with low resistance and having no resistance differences among the 3
leads.
3. Conduct input signal wiring away from instrument power, electric equipment power and loads lines
to avoid noise induction.
4. Conduct instrument power wiring so as not to be influenced by noise from the electric equipment
power. If the instrument is affected by external noise, a noise filter should be used.
a. Shorten the distance between twisted power supply wire pitches. The shorter the distance
between the pitches, more effective is the noise reduction.
b. Install the noise filter on the panel which is always grounded and minimize the wiring distance
between the noise filter output side and the instrument power terminals.
c. Do not install fuses and/or switches on the filter output signal since this may looses filter effect.
5. For wiring, use wires conforming to the domestic standards of the countries.
6. This instruments has no power supply switch for fuses. Therefore, install the fuse close to the
instrument and theswitch, if required.
7. Do not excessively tighten the terminal screws. In addition, use the solderless terminal with respect
to the screw size.
6. INSTALLATION
Recommendation
1. This instrument is intended to be used under the following OVERVOLTAGE CATEGORY II, and
POLLUTION DEGREE 2,
2. Use this instrument within the following ambient temperature and humidity.
a. Temperature: 0~50°C
b. Humidity: 45~85% RH
3. Avoid the following when selecting the mounting location:
a. Rapid changes in ambient temperature which may cause condensation.
b. Corrosive or inflammable gases.
c. Direct vibration or shock to the mainframe,
d. Water, oil, chemicals, vapor or steam splashes.
e. Excessive induction noise, static electricity, magnectic fields or noise
f.
Exposure to direct sunlight,
g. Excessive heat accumulation.