Wika PGS21 Manual do Utilizador descarregar pdf (Página 11)

WIKA operating instructions models PGS10, PGS11 and PGS21

5. Electrical switch contacts

Index Designa-

tion

Symbol Switching function / setting

direction

Code

1 Normally

open

(NO)

Contact makes with rising pressure or

clockwise pointer motion (standard)

Contact breaks with falling pressure or

anticlockwise pointer motion

2 Normally

closed

(NC)

Contact breaks with rising pressure or

clockwise pointer motion (standard)

Contact makes with falling pressure or

anticlockwise pointer motion

12 Normally

open /

closed

(NO-NC)

See switching function or setting

direction for single contact

11 Normally

open /

open

(NO-NO)

See switching function or setting

direction for single contact

22 Normally

closed /

closed

(NC-NC)

See switching function or setting

direction for single contact

Magnetic snap-action contact (normally closed or normally open)

The instruments are delivered with a single or double contact (normally

closed or normally open).

With 'normally closed', the contact ag is engaged with the limit switch and,

on rising pressure, disengages from the contact via the actuator attached to

the pointer. The circuit will be interrupted.

With 'normally open' the contact ag follows the pointer until the limit value

is reached. Once the limit value has been exceeded, the contact ag

engages and the circuit is closed.

The switching function of the switch is indicated by the index 1, 2, 12, 11

or 22.

11581752.02 09/2013 GB/D/F/E

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 67 68

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