West Control Solutions SG 45 - Manual (Page 15)

4.5 Hints for installation
w
Measurement and data lines should be kept separate from control and power supply cables.
w
Sensor measuring cables should be twisted and screened, with the screening connected to
earth.
w
External contactors, relays, motors, etc. must be fitted with RC snubber circuits to manufacturer
specifications.
w
The unit must not be installed near strong electric and magnetic fields.
w
The temperature resistance of connecting cables should be selected in accordance with the
local conditions.
a
The unit is not suitable for installation in explosion-hazarded areas.
a
Faulty connection can lead to the destruction of the instrument.
a
The measurement inputs are designed for measurement of circuits which are not connected directly with
the mains supply (CAT I). The measurement inputs are designed for transient voltage peaks up to 800V
against PE.
Please, follow the instructions given in the safety hints.
4.6 UL approval (optional)
For compliance with UL regulations, the following points must be taken into account:
q
Use only copper (Cu) wires for 60 / 75 °C ambient temperature.
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The connecting terminals are designed for 0,5 – 2,5 mm 2 Cu (12-30 AWG) conductors.
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The screw terminals must be tightened using a torque of 0,5 – 0,6 Nm.
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The instrument must be used exclusively for indoor applications.
q
Max. ambient temperature: 55°C.
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Maximum operating voltage: see technical data.
q
Max. ratings of relay contacts: 250VAC, 2A (resistive)
Electrical connections
SG 45 Hints for installation 15