Units For Hazardous (Ex) Areas - Panasonic EBL128 Planning Instructions

Panasonic Eco Solutions Nordic AB
MEW01622 Rev: -
6.1.5

Units for Hazardous (Ex) areas

In hazardous (Ex) areas, Intrinsically Safe (IS) and approved products
are required. The IS alarm points are connected to an interface outside
the Ex area.
Normally the analog addressable units, IS smoke (2840) and heat
(2841) detectors shall be used. They are connected to an IS barrier
unit (2842), which is connected to a c.i.e. via a COM loop.
Conventional units (e.g. IS manual call point) are connected via a
Galvanic isolator MTL 5061 (2820), which is connected to an
Expansion board (4580) Ex zone line input or to an Isolated zone
interface (2822), which is connected to a c.i.e. via an I/O unit (3361).
See also drawings 128 – 30 and – 32.
MTL5061 Galvanic isolator (2820). The isolator is used to connect
conventional IS detectors and manual call points to an
expansion board 4580 zone line input (programmed in
"Resistor-Ex" mode) or to an Isolated zone interface (2822).
The isolator has two zone line inputs and two outputs (Channel
1 & 2) and is mounted in a Waterproof box (IP66/67), which
has to be mounted outside the hazardous (Ex) area.
compression glands for the cable entries and two end-of-line
resistors (10K) with an area >230 mm
dimensions (L x W x H): 175 x 125 x 150 mm. BASEEFA /
ATEX classification: EEx ia IIC T
2822 Isolated zone interface. The Isolated zone interface (2822)
contains of a waterproof box (IP66/67) that is supplied with
four compression glands for the cable entries, an Isolated zone
interface board (2823) mounted on a DIN rail, a DIN rail
interface intended for an I/O unit (3361) and one 8K2 e-o-l
resistor. The box has to be mounted outside the hazardous (Ex)
area
A Galvanic isolator 2820 is to be connected to the Isolated zone
interface 2822 (i.e. to the Isolated zone interface board 2823),
which is connected to a COM loop via an Addressable
multipurpose I/O unit 3361 that can be mounted inside the
waterproof box. (2820 and 3361 have to be ordered separately.)
Ext. power supply 24 V DC (30 mA) is required.
dimensions (L x W x H): 175 x 175 x 75 mm.
2842 Intrinsically safe (IS) barrier unit. The barrier unit is used to
connect analog addressable IS detectors to a COM loop. The
unit has connectors for COM loop in / out, external power
supply (24 V DC, 60 mA) and one IS COM line for connection
of up to 20 IS detectors 2840 and 2841. It is mounted in a
Waterproof box (IP66/67). Five compression glands for the
cable entries are supplied. Box dimensions (L x W x H): 280 x
280 x 133 mm. DEKRA: II (1) G [Ex ia Ga] IIC.
EBL128 Planning Instructions V2.0.x
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