Electrex Rexcon Die Sentry Manuel - Page 2
Parcourez en ligne ou téléchargez le pdf Manuel pour {nom_de_la_catégorie} Electrex Rexcon Die Sentry. Electrex Rexcon Die Sentry 14 pages.
that they not be removed from the supplied enclosure. Also, make
sure the enclosure remains tightly sealed while in operation, and
that the punched holes be located and sealed properly to avoid
leakage into the enclosure.
VIBRATION
The Rexcon devices are intended to be used with machines - and
are designed to survive in such an environment. Just as drivers try
to avoid potholes with their cars though, Rexcon devices should be
installed in the most vibration-free location available. If possible,
mount the devices on the control panels located off the machine;
rubber shock absorbing mounts are recommended and provided.
NOISE
The micro-electronics that make up Rexcon devices can be highly
susceptible to "ELECTRICAL NOISE." While every precaution has
been taken to avoid noise related problems, there are several
installation considerations which can further protect against
electrical noise. Noise can enter the Rexcon device in two (2) basic
ways - direct (through wires) and Radiated (through the air).
Methods for avoiding direct noise will be discussed in detail in the
WIRING SECTIONS which follows. There are several ways to help
avoid radiated electrical noise while installing a device. First, relays
are a tremendous source of radiated noise - avoid mounting any
Rexcon device in or on a relay panel. Second, all wires act as
antennas so keep them as short as possible. Coils of unused wire
(even small ones) can amplify noise to problem causing levels.
Finally, the more wires there are, the more chances that one of
them is radiating a lot of noise - DO NOT use the Rexcon device as
a junction box. Keeping the wires in the enclosure to a minimum
(both in length and number) can greatly reduce the risk of radiated
noise problems.
WIRING A DEVICE
In this section, the wiring of devices will be detailed. All Rexcon
monitoring devices are designed to operate from 110 volt AC power
lines and use optically isolated I/O module (AC or DC) for
connections to the outside world. AC power connections the
Rexcon devices all operate on 85-130 VAC at 60 Hz. The AC
power drives a power supply in the Rexcon device enclosure which
in turn provides +5 Volts DC to the circuit board. Because this is
what powers the sensitive micro-electronics, it is important that the
AC power be as noise free as possible. There are a couple of
things which can be done to improve the quality of the AC power
input to the machine the device is being installed on. Using the AC
power from the most convenient point may save some wire, but it
may play a part if noise problems develop later. Along those same
lines, when AC I/O modules are used, DO NOT take common
connections from the device's AC power inputs. If AC connections
are needed for the I/O modules, run separate wires to the AC
source. The AC power connections should be wired as shown in