-5-
Released 2018-09-10
Bulletin No. CR3000- B
Drawing No. LP1042
EMC
INSTALLATION
GUIDELINES
Although Red Lion Controls products are 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 the electrical noise, source or coupling method
into a unit may be different for various installations. Cable length, routing,
and shield termination are very important and can mean the difference
between a successful or troublesome installation. Listed are some EMI
guidelines for a successful installation in an industrial environment.
1. A unit should be mounted in a metal enclosure, which is properly
connected to protective earth.
2. Use shielded cables for all Signal and Control inputs. The shield
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 to earth ground (protective earth) at one end
where the unit is mounted.
b. Connect the shield to earth ground at both ends of the cable, usually
when the noise source frequency is over 1 MHz.
3. Never run Signal or Control 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 through 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.
Also, Signal or Control cables within an enclosure should be routed as
far away as possible from contactors, control relays, transformers, and
other noisy components.
4. Long cable runs are more susceptible to EMI pickup than short cable runs.
5. In extremely high EMI environments, the use of external EMI
suppression devices such as Ferrite Suppression Cores for signal and
control cables is effective. The following EMI suppression devices (or
equivalent) are recommended:
Fair-Rite part number 0443167251 (Red Lion Controls #FCOR0000)
Line Filters for input power cables:
Schaffner # FN2010-1/07 (Red Lion Controls #LFIL0000)
6. To protect relay contacts that control inductive loads and to minimize
radiated and conducted noise (EMI), some type of contact protection
network is normally installed across the load, the contacts or both. The
most effective location is across the load.
a. Using a snubber, which is a resistor-capacitor (RC) network or metal
oxide varistor (MOV) across an AC inductive load is very effective at
reducing EMI and increasing relay contact life.
b. If a DC inductive load (such as a DC relay coil) is controlled by a
transistor switch, care must be taken not to exceed the breakdown
voltage of the transistor when the load is switched. One of the most
effective ways is to place a diode across the inductive load. Most
Red Lion products with solid state outputs have internal zener diode
protection. However external diode protection at the load is always a
good design practice to limit EMI. Although the use of a snubber or
varistor could be used.
Red Lion part numbers: Snubber: SNUB0000
Varistor: ILS11500 or ILS23000
7. Care should be taken when connecting input and output devices to the
instrument. When a separate input and output common is provided,
they should not be mixed. Therefore a sensor common should NOT be
connected to an output common. This would cause EMI on the
sensitive input common, which could affect the instrument’s operation.
Visit
www.redlion.net/emi
for more information on EMI guidelines,
Safety and CE issues as they relate to Red Lion products.
COMMUNICATING
WITH
THE
CR3000
CONFIGURING
A
CR3000
The CR3000 is configured using Crimson® 3.1 software. Crimson is
available as a no charge download from Red Lion’s website. Crimson
updates for new features and drivers are posted on the website as they
become available. By configuring the CR3000 using the latest Crimson
version, you are assured that your unit has the most up to date feature
set. Crimson software can configure the CR3000 through the RS232
PGM port, USB device port, Ethernet port or SD card.
The CR3000 has three or four serial ports, a USB device port, one or
two USB Host ports, and an Ethernet port as shown below.
The serial ports are available via RJ connectors. There are two RS232
ports. The port labeled RS232 (PGM) can be used as a Programming
Port or you can assign a protocol to it. The RS485 ports can be used for
both RS485 or 422 communications. All of the serial ports are isolated.
Note: If you assign a protocol to the Programming Port, you will no
longer be able to download to that port. You should create a means
to call the StopSystem() function from the HMI touchscreen, such
that the Programming Port activity can be halted on command.
Alternatively, the HMI's memory can be cleared to restore download
functionality.
Ethernet port(s) can be programmed to communicate via ten protocols
simultaneously. For more information on protocol support, please refer to
the Crimson 3.1 programming software.
The USB device port is a standard device port with a Type B connector,
and is used as the programming port. The driver needed to use the USB
port will be installed with Crimson.
The USB host port(s) are standard host ports with Type A connector(s)
and can be used to interface to USB enabled peripherals. These ports
supply 5 V power per the USB standard.
The SD card can be used to program a CR3000 by placing an image
file on the SD card. The card is then inserted into the target CR3000 and
powered. Refer to the Crimson 3.1 User Manual for more information on
the proper names and locations of this file.
RS232
RS485
RS232 (PGM)
USB
DEVICE
ETHERNET
USB
HOST
RS232
RS485/422
RS232 (PGM)
COMM
COMM
COMM
COMM
COMM
TxA
(PIN 8)
TxB (PIN 1)
R
TS (PIN 6)
CTS (PIN 1)
CTS (PIN 1)
R
TS (PIN 6)
RxA
RxB
TxB
TxEN
Tx
TxA
Rx
Tx
Rx
ETHERNET
(NIC)
USB
TYPE B
USB
TYPE A
CR3000 04 PORT PIN OUTS
RS232
RS485
PORT A
RS232 (PGM)
COMM
COMM
COMM
COMM
COMM
TxA
(PIN 8)
TxB (PIN 1)
R
TS (PIN 6)
CTS (PIN 1)
CTS (PIN 1)
R
TS (PIN 6)
RxA
RxB
TxB
TxEN
Tx
TxA
RS485
PORT B
COMM
TxA
(PIN 8)
TxB (PIN 1)
RxA
RxB
TxB
TxEN
TxA
Rx
Tx
Rx
1
ETHERNET
(NIC)
2
ETHERNET
(NIC)
USB
TYPE B
RS232
PORT A
RS485
RS232 (PGM)
USB
DEVICE
2
ETHERNET
USB
HOST
PORT B
RS485
1
ETHERNET
DUAL USB
TYPE A
CR3000 07/10/15 PORT PIN OUTS
