red lion DLC00001 - EMC Installation Guidelines; Step 1 Setting the Jumpers and DIP Switches

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STEP 1 SETTING THE JUMPERS AND DIP SWITCHES

The jumpers are accessible from the bottom of the controller. Needle-nose

pliers are needed to remove the jumpers. They should be set prior to installation.

To insure proper operation, the jumpers must match the controller software

configuration.

ANALOG DC OUTPUTS (OPTIONAL)

Analog Output 1 and Analog Output

2 can be configured for voltage (V) or

current (I), independent of each other.

Both V/I + and V/I - jumpers of the

same channel must be set for the same

type of output signal.

INPUTS

Channel A and Channel B can be

configured independent of each other.

Jumper position can be ignored for

thermocouple and millivolt inputs.

I2-

V2+

I2-

V2+

I1-

V1+

I1-

V1+

Analog

Output 2

Jumpers

Analog

Output 1

Jumpers

10V

20mA

RTD

10V

20mA

RTD

Channel A

Input

Channel B

Input

Channel B

Input Jumpers

Channel A

Input Jumpers

Analog Output 2

Jumpers (current)

Analog Output 1

Jumpers (current)

(RTD)

(As set from factory)

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 http://www.redlion.net/emi for more information on EMI guidelines,

Safety and CE issues as they relate to Red Lion products.

SERIAL DIP SWITCH SETTINGS

The DLC Serial Communications Settings can be set via DIP Switches or

through the serial communications port (software selectable). The software

selectable serial settings method using the serial communications port must be

set using “RLCPRO” or another software program to write to the DLC Modbus

registers (40401-40407). When using the DIP switches to configure the serial

settings, the Modbus mode is limited to “RTU” mode only.

SWA

BAUD RATE

PARITY

DEFAULT

M2802X

SWB: ADDRESS

X32

X128

X64

X16