Rockwell Automation Sensia Jiskoot InSpec Remote I/O HUB, Инструкция по установке, эксплуатации и обслуживанию

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Section 4: Field Connections InSpec Remote I/O HUB (ATEX, IECEx)
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EARTHING REQUIREMENTS
An external protective earth (PE) conductor, associated with unit’s main power source, must be
connected to the dedicated PE terminal. The minimum size of the incoming external earth wire is 2.5mm²
(14 AWG) and rated for 300V, 105°C, VW-1.
There is provision for making an external earth connection to the enclosure, via an external grounding
screw.
SHIELDED (SCREENED) CABLES
Control and signal cable screens and drain wires should be terminated to a low-impedance earth (ground),
preferably using a 360° shield (screen) clamp. If pigtails are used, where the screen is brought down to a single
wire and connected to the earth point, these must be as short as possible; otherwise the inductance of the pigtail
renders it useless at high frequencies.

For a circuit with an ungrounded source the screen should be terminated at the input end, whereas if the
input is floating and the source is grounded then the screen should be terminated at the source end.

If both the signal source and signal inputs are both grounded, terminating the screen at both ends is not
recommended as this may reduce the performance of the system.

To shield against low-frequency electric fields terminate the screen at one end only.

To shield against low-frequency magnetic fields terminate both ends of the screen.
POWER
INSTRUMENT POWER
The instrument can be supplied for use with either AC or DC power. The instructions below describe the wiring
connections for each power supply type.

Do not attempt to power the instrument from both AC and DC supplies at the same time!

A double-pole isolator, having suitable safety approvals for the country of the equipment’s end
use, must be installed to disconnect the equipment from the supply. It must be located nearby
and easily reached; and marked as the disconnecting device for the equipment.
AC Power Supply Connection - Model Numbers # # A ## # ## ##
# # B ## # ## ##
# # C ## # ## ##
AC power is connected to the unit via terminals E , N , and F1 .
TERMINAL FUSE DUTY
E Protective Earth
N Neutral
F1 F1 Live
Ensure that the associated supply fuse or circuit breaker and cabling is suitably sized.