19

EB3L Lamp Barrier

Precautions for Operation

1. Installation of EB3L Lamp Barriers

(1) The EB3L can be installed in any direction.

(2) Install the EB3L lamp barrier in a safe area (non-hazard-

ous area) in accordance with intrinsic safety ratings and

parameters. To avoid mechanical shocks, install the

EB3L in an enclosure which suppresses shocks.

(3) When installing or wiring the EB3L, prevent electromag-

netic and electrostatic inductions in the intrinsically safe

circuit. Also prevent the intrinsically safe circuits from

contacting with another intrinsically safe circuit and any

other circuits.

Maintain at least 50 mm clearance, or provide a metallic

separating board between the intrinsically safe circuit

and non-intrinsically safety circuit. When providing a

metallic separating board, make sure that the board fits

closely to the enclosure (top, bottom, and both sides).

Allowable clearance between the enclosure and board is

1.5 mm at the maximum.

The clearance of 50 mm between the intrinsically safe

circuit and non-intrinsically safe circuit may not be suffi-

cient when a motor circuit or high-voltage circuit is

installed nearby. In this case, provide a wider clearance

between the circuits referring to 6 (3) “Minimum Parallel

Distance between the Intrinsically Safe Circuit and

Other Circuits.”

(4) In order to prevent contact between intrinsically safe cir-

cuits and non-intrinsically safe circuits, mount EB3L

units with terminals arranged in the same direction.

(5) Maintain at least 6 mm (or 3 mm according to

IEC60079-11: 1999) clearance between the terminal of

intrinsically safe circuit and the grounded metal part of a

metal enclosure, and between the relay terminal block of

an intrinsically safe circuit and the grounded metal part

of a metal enclosure.

(6) For installing the EB3L, mount on a 35-mm-wide DIN rail

or directly on a panel using screws. The EB3L can be

installed in any direction. Make sure to install securely to

withstand vibration. When mounting on a DIN rail, push

in the clamp completely. Use the BNL5 mounting clips

on both sides of the EB3L to prevent from moving side-

ways.

(7) Excessive extraneous noise may cause malfunction and

damage to the EB3L. When extraneous noise activates

the voltage limiting circuit (thyristor), remove the noise

source and restore the power.

2. Terminal Wiring

(1) Using a ø5.5 mm or smaller screw driver, tighten the ter-

minal screws (including unused terminal screws) to a

torque of 0.6 to 1.0 N·m (recommended value).

(2) Make sure that IP20 is achieved when wiring. Use insu-

lation tubes on bare crimping terminals.

(3) To prevent disengaged wires from contacting with other

intrinsically safe circuits, bind together the wires of one

intrinsically circuit.

(4) When the adjacent terminal is connected to another

intrinsically safe circuit, provide an insulation distance of

at least 6 mm.

3. Signal Input

(1) Connect the EB3L to the switches or output equipment

which have a low leakage current (0.1 mA maximum).

(2) The EB3L is equipped with power supply. Do not apply

external power to the EB3L.

(3) When connecting the EB3L’s of connector type in paral-

lel, make sure that the same power supply is used.

When using C1 and C2 terminals to supply power to

outside equipment, maintain the current at 50 mA maxi-

mum.

4. Power Voltage

(1) Do not apply an excessive power voltage, otherwise the

EB3L may be damaged.

(2) The EB3L of AC power type may operate at a low volt-

age (approx. 20V).

5. Pilot Lights and Buzzers in the Hazardous Area

(1) EB3P and IPL1 units shown on page 12 can be used

with the EB3L.

(2) Install the EB3P and IPL1 units on enclosures of IP20 or

higher protection.

(3) When wiring, make sure of correct polarities of the

EB3P and IPL1.

(4) Certification mark is supplied with the units. Attach it on

the visible area of the EB3P or IPL1 (for Japan applica-

tion).

(5) Magnesium content of metallic enclosure must be 6% or

less (steel and aluminum are acceptable).

(6) The maximum exposed area of plastic enclosure is as

follows.

When the enclosure has a wider exposed area, attach a

caution label as shown below.

Intrinsically Safe Circuit

Intrinsically Safe Circuit

Non-intrinsically

Safe Circuit

EB3L

EB3L

EB3L

EB3L

EB3L

Caution

To prevent electrostatic charges,

do not rub the enclosure sur face

during operation. Use a soft cloth

dipped with water for cleaning.

EB3C-3L catalog Page 19 Monday, February 13, 2006 1:44 PM