3500/15 127610-01 Bently Nevada AC Power Module

Description

In general, 3500/15 127610-01 the aluminum PLC baseplate is used for module shield grounding. On many Series

90-30 I/O modules, shield connections to the removable terminal block on the module are

routed to the baseplate through the module’s backplane connector. Other modules, such as

CPUs 351, 352, 363, and 364, require a separate shield ground. These modules come equipped

with suitable grounding hardware. 3500/15 127610-01 Grounding instructions for these CPUs are discussed in the

Series 90–30 Installation and Hardware Manual, GFK–0356P (or later version).

Some of the Series 90-30 Option modules, such as the FIP Remote I/O Scanner

(IC693BEM330), and DSM modules (IC693DSM302 and IC693DSM314) also have shield

grounding requirements. These modules come equipped with suitable grounding hardware.

Please refer to each module’s user’s manual for grounding instructions.

States. 3500/15 127610-01 They are cited here as a reference. Where they are in conflict with codes that apply to

your area or your type of equipment, you should follow your applicable codes instead. Besides

satisfying code requirements, wire color coding makes testing and troubleshooting safer, faster,

and easier.

Green or green with stripe– Ground

Black – Primary AC

Red – Secondary AC

Blue – DC

White – Common or neutral

Yellow – Secondary power source not controlled by the main disconnect. Alerts

maintenance personnel that there may be power present (from an external source) even

if the equipment is disconnected from its main power source.

3500/15 127610-01 Wire Routing

To reduce noise coupling among PLC wires, it is recommended you keep electrically noisy

wiring, such as AC power wiring and Discrete Output Module wiring, physically separated

from low-level signal wiring such as DC and Analog Input module wiring or communications

cables. This can be accomplished by grouping separately, where practical, the following

categories of wiring:

AC power wiring. This includes the AC input to the PLC power supply, as well

as other AC devices in the control cabinet.

Analog Input or Output Module wiring. This should be shielded to further

reduce noise coupling. See Chapter 9 for details.

Discrete Output Module wiring. These often switch inductive loads that produce

noise spikes when switched off.

DC Input Module wiring. Although suppressed internally, these low-level inputs

should be further protected against noise coupling by observing these wiring

practices.

3500/15 127610-01 Communications Cables. Wiring such as Genius Bus, Ethernet, or serial

communications cables should be kept away from noise-producing wiring.

Where AC or Output wiring bundles must pass near noise-sensitive signal wiring bundles, avoid

running them beside (parallel with) each other. Route them so that, if they have to cross, they

do so at a right angle. This will minimize coupling between them.

Grouping Modules to Keep Wires Segregated

If practical, grouping similar modules together in the PLC racks can help keep wiring

segregated. For example, one rack could contain only AC modules, and a different rack only

DC modules, with further grouping in each rack by input and output types. For smaller

systems, as an example, 3500/15 127610-01 the left end of a rack could contain Analog modules, the middle could

contain DC modules, and the right end could contain AC modules.

Discrete I/O Module Connection Methods

For modules with 16 points or less, the standard method is to use the removable

terminal board which comes with these modules. The removable terminal board

makes it easy to prewire field wiring to the user supplied input and output devices,

and to replace modules in the field without disturbing existing field wiring.

Some discrete 16-point I/O modules can be used with an optional Terminal Block

Quick Connect (TBQC) assembly. This assembly contains a module faceplate, with

built-in connector, that replaces the removeable terminal board. The assembly also

contains a DIN-rail mounted terminal block and a cable to connect the module to the

terminal block. The advantage of this method is that it saves about two hours of

wiring time per module compared with hand wiring from a module’s removable

terminal board to a user-supplied, panel-mounted terminal block or strip. See

Appendix D for TBQC information.

Older 32-point I/O modules have one 50-pin connector on the front of the module that

is either connected by a cable with a connector on each end to a Weidmuller

panel-mounted terminal block (Weidmuller catalog no. 912263), or is connected by a

cable with stripped, tinned leads to a user-supplied terminal block or strip.

Newer 32-point I/O modules have two 24-pin connectors on the front of the module.

These module may be wired in one of three ways. (1) Use a pair of cables

(IC693CBL327/328 – see data sheet in “Cables” chapter) to connect the module to a

user-supplied, panel-mounted terminal block or strip. These cables have a 24-pin

connector on one end, and stripped, tinned leads with wire markers on the other end.

(2) Use a pair of dual-connector cables to connect the module to a Terminal Block

Quick Connect (TBQC) terminal block (IC693ACC377). See Appendix D for details.

(3) Make your own custom cables (instructions are found in the IC693CBL327/328

data sheet in Appendix C).

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