Samson 4763, Mounting And Operating Instructions

3

Connections

3.1 Electrical connections

DANGER!

Risk of electric shock and/or the

formation of an explosive atmo-

sphere!

–

For electrical installation, observe the rel-

evant electrotechnical regulations and

the accident prevention regulations that

apply in the country of use.

–

The following regulations apply to

mounting and installation in hazardous

areas: EN 60079-14: 2008

Explosive

atmospheres – Part 14: Electrical instal-

lations design, selection and erection

(or

VDE 0165 Part 1).

NOTICE

–

Adhere to the terminal assignment!

Switching the assignment of the electrical

terminals may cause the explosion pro-

tection to become ineffective!

–

Do not loosen enameled screws in or on

the housing.

–

The maximum permissible values speci-

fied in the national EC type examination

certificates apply when interconnecting

intrinsically safe electrical equipment  (U

i

or U

o

; I

i

or I

o

; P

i

or P

o

; C

i

or C

o

, and L

i

or

L

o

).

Selecting cables and wires:

Observe

Clause 12 of EN 60079-14: 2008

when installing intrinsically safe circuits. The

Subclause 12.2.2.7 applies when running

multi-core cables containing more than one

intrinsically safe circuit.
In particular, the radial thickness of the con-

ductor insulation for common insulation ma-

terials, such as polyethylene, must have a

minimum radial thickness of 0.2 mm.
The diameter of an individual wire in a

fine-stranded conductor must not be smaller

than 0.1 mm. Protect the conductor ends

against splicing, e.g. by using wire-end fer-

rules.
When two separate cables are used for con-

nection, an additional cable gland can be

installed.

Seal cable entries left unused with plugs.
Devices used at ambient temperatures

be-

low –20 °C

must be fitted with metal cable

glands.

Equipment for use in zone 2/zone 22

In equipment operated with type of protec-

tion Ex nA II (non-sparking equipment) ac-

cording to EN 60097-15: 2003, circuits

may be connected, interrupted or switched

while energized only during installation,

maintenance or repair.

The wiring for the input signal is led using

cable glands to the terminals 11 (+) and 12

(–). The ground connection can be

connected inside or outside of the positioner

housing.

10

EB 8359-2 EN

Connections