Red Lion ICM4 - Manual (Page 2)

2
SPECIFICATIONS (Cont’d)
7. ENVIRONMENTAL CONDITIONS:
Operating Temperature Range: 0 to 50°C. Derate max. operating
temperature to 40°C above 26 VDC.
Storage Temperature: -40 to + 75°C
Operating and Storage Humidity: 85% max.relative humidity
(non-condensing) from 0 to 50°C
Altitude: Up to 2000 meters
8. CONSTRUCTION: Case body is black, high impact plastic. Installation
Category I, Pollution Degree 2.
9. MOUNTING: Standard DIN rail top hat (T) profile rail according to
EN50022- 35 X 7.5 and 35 X 15
10. WEIGHT: 3.2 oz. (90.7 g)
EMC INSTALLATION GUIDELINES
Although this unit is designed with a high degree of immunity to
ElectroMagnetic Interference (EMI), proper installation and wiring methods
must be followed to ensure compatibility in each application. The type of
electrical noise, source or coupling method into the unit may be different for
various installations. In extremely high EMI environments, additional measures
may be needed. Cable length, routing and shield termination are very important
and can mean the difference between a successful or a troublesome installation.
Listed below are some EMC guidelines for successful installation in an
industrial environment.
1. DC power to the unit should be relatively clean and within the specified
limits. Connecting power to the unit from circuits that power inductive loads
that cycle on and off, such as contactors, relays, motors, etc., should be
avoided. This will reduce the chance of noise spikes entering the DC power
connection and affecting the unit.
2. The shield (screen) pigtail connection should be made as short as possible.
The connection point for the shield depends somewhat upon the application.
Listed below are the recommended methods of connecting the shield, in
order of their effectiveness.
a. Connect the shield only at the unit to earth ground (protective earth).
b. Connect the shield to earth ground at both ends of the cable, usually when
the noise source frequency is above 1 MHz.
c. Connect the shield to common of the unit and leave the other end of the
shield unconnected and insulated from earth ground.
3. Never run Signal cables in the same conduit or raceway with AC power lines,
conductors feeding motors, solenoids, SCR controls, and heaters, etc. The
cables should be run in metal conduit that is properly grounded. This is
especially useful in applications where cable runs are long and portable two-
way radios are used in close proximity or if the installation is near a
commercial radio transmitter.
4. Signal cables within an enclosure should be routed as far away as possible
from contactors, control relays, transformers, and other noisy components.
5. In extremely high EMI environments, the use of external EMI suppression
devices, such as ferrite suppression cores, is effective. Install them on Signal
cables as close to the unit as possible. Loop the cable through the core several
times or use multiple cores on each cable for additional protection.
Install line filters on the power input cable to the unit to suppress power line
interference. Install them near the power entry point of the enclosure. The
following EMI suppression devices (or equivalent) are recommended:
Ferrite Suppression Cores for signal cables:
Fair-Rite # 0443167251 (RLC #FCOR0000)
TDK # ZCAT3035-1330A
Steward #28B2029-0A0
Line Filters for input power cables:
Schaffner # FN610-1/07 (RLC #LFIL0000)
Schaffner # FN670-1.8/07
Corcom #1VR3
Note: Reference manufacturer’s instructions when installing a line filter.
6. Long cable runs are more susceptible to EMI pickup than short cable runs.
Therefore, keep cable runs as short as possible.
TYPICAL RS422 CONNECTIONS
Notes:
1. Connect shield drain wire to earth ground.
2. Place DIP switch on the side of the ICM4 in the 422 position.
3. RS422 polarity: Terminal “A” is negative with respect to Terminal “B” in
the mark (logic 1) condition.
SIDE VIEW OF ICM4