AMCI NEXUS NX2A4E2, Руководство пользователя

Страница: 31 / 76

20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786

Tel: (860) 585-1254 Fax: (860) 584-1973 http://www.amci.com
31
TASK 1
I
NSTALLING THE
NX2A4E2
1.1 Safe Handling Guidelines
1.1.1 Prevent Electrostatic Damage
Electrostatic discharge can damage the NX2A4E2 if you touch connector pins. Follow
these guidelines when handling the module.
1) Touch a grounded object to discharge static potential before handling the module.
2) Work in a static-safe environment whenever possible.
3) Wear an approved wrist-strap grounding device.
4) Do not touch the pins of the I/O or Ethernet connectors.
5) Do not disassemble the module
6) Store the module in its anti-static bag and shipping box when it is not in use.
1.1.2 Prevent Debris From Entering the Unit
While mounting a unit, make sure that all debris (metal chips, wire strands, tapping liq-
uids, etc.) is prevented from falling into the module. Debris may cause damage to the
unit or unintended machine operation with possible personal injury. When using DIN
rail to mount the unit, the rail should be securely installed and grounded before the unit
is mounted on it.
1.1.3 Remove Power Before Servicing
Remove power before removing or installing the NX2A4E2 module.
1.2 General Wiring Guidelines
When wiring any control system, these guidelines must be followed to help prevent electromagnetic interfer-
ence and ground loops:
1.2.1 Wiring
Transducer signals are generally low voltage, low power signals. If you are using A-B guidelines for cabling
installation, treat the transducer cable as a Category 2 cable. It can be installed in conduit along with other
low power cabling such as communication cables and low power ac/dc I/O lines. It cannot be installed in con-
duit with ac power lines or high power ac/dc I/O lines.

Like all signal and communication cable, the transducer cable should be shielded. The shield must be
grounded at one end only, typically at the input to the NX2A4E2.

If a junction must be made in the signal cable, treat the shield as a signal-carrying conductor. Do not
connect the shield to ground at any junction box or the transducer.

If the signal cable must cross power feed lines, it should do so at right angles.

Route at least five feet from high voltage enclosures, or sources of “rf” radiation.
This chapter covers the physical installation of the NX2A4E2.