WIKA PGS10 Betriebsanleitung Seite 10

5. Electrical switch contacts
Magnetic snap-action contact (normally closed or normally open)
The instruments are delivered with a single or double contact (normally
closed or normally open).
GB
With 'normally closed', the contact flag 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 flag follows the pointer until the limit value
is reached. Once the limit value has been exceeded, the contact flag
engages and the circuit is closed.
The switching function of the switch is indicated by the index 1, 2, 12, 11
or 22.
Index Designa-
tion
1 Normally
open
(NO)
2 Normally
closed
(NC)
12 Normally
open /
closed
(NO-NC)
Normally
11
open /
open
(NO-NO)
22 Normally
closed /
closed
(NC-NC)
10
Symbol
WIKA operating instructions models PGS10, PGS11 and PGS21
Switching function / setting
direction
Contact makes with rising pressure or
clockwise pointer motion (standard)
Contact breaks with falling pressure or
anticlockwise pointer motion
Contact breaks with rising pressure or
clockwise pointer motion (standard)
Contact makes with falling pressure or
anticlockwise pointer motion
See switching function or setting
direction for single contact
See switching function or setting
direction for single contact
See switching function or setting
direction for single contact
Code
1
5
2
4