envea VIEW 370, Руководство пользователя

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2 Technical Data VIEW 370/373
8
(PC-000855-MA Issue 6, December 2021)
ENVEA UK Ltd
2.4 Cabling
All cabling should be rated for use up to at least +65 °C (149 °F) to allow for an
ambient temperature of up to +50 °C (122 °F). Cables supplied by ENVEA meet
these requirements. For information on sensor cabling requirements and
considerations, refer to Technical Note TN007 Network Cable Lengths (see
page
3).
Maximum
cable lengths

RS-232: 15 m (50 ft.)

RS-485: 1,000 m (0.6 mi / 3,280 ft.)
ProController only –

Ethernet (RJ45): up to 100 m (333 ft.) between active
devices

USB 2.0: 2 m (6½ ft.)
2.4.1 Power Supply Cable Specification
WARNING
Hazardous voltages.
A suitable approved and rated mains isolation device must be installed.
The device must be clearly marked and easily accessible (within a
2m/6½ft. radius) to allow the control unit to be switched off when at the
unit.
The contact gap of the disconnect device must be at least 3mm.
For mains connections, use an appropriate cable with a conductor area range from
0.75mm² to 2.5mm², in accordance with your local regulations.
2.4.2 Data Cable Specification
The minimum requirements are outlined in the following table. Cables supplied by
ENVEA meet these requirements.
Cable type
4-core (2-pair) cable; conductor size: 0.5 mm²
(16/0.2)
Current rating
1A r.m.s (per core), max.
Working
voltage
440V r.m.s, max.
Cable shielding
Flame-retardant PVC outer sheath (
Ø
7.9 mm/0.3
sq.in.), with overall tinned copper, braided, or foil
screen.
Note : for electrically noisy environments, the use of a
braided, screened cable is recommended. For very
noisy environments, use a cable with multiple layers of
foil and braid shielding.
Resistance
<4 0Ω/ km (12.192 Ω/ kft), recommended for long
cable runs
Compliance
BS5308 part 2, type 1