Samson 3767 - Adjusting the Optional Limit Switches

EB 8355-2 EN 5-23
Installation
4. Turnthezeroadjuster(6.2inFig.5-3)
again until the pressure gauge indicates
the required signal pressure (see infor-
mation under 'Supply pressure' in the 'In-
stallation' section).
5.5.3 Adjusting the optional
limit switches
The positioner version with inductive limit
switches has two adjustable tags mounted on
a rotary shaft which operate the associated
proximity switches (1 in Fig.5-12).
The operation of the inductive limit switches
requiresswitchingamplierstobeconnected
intheoutputcircuit(seesection5.7.1).
When the tag (2) is located in the inductive
eldoftheswitch,theswitchassumesahigh
resistance.Whenitmovesoutsidetheeld,
the switch assumes a low resistance.
The limit switches are usually adjusted to
issue a signal for both end positions. The
switching points can also be adjusted to
indicate intermediate positions.
The switches A and B must be assigned to
the end positions of the control valve (valve
OPEN or CLOSED) depending on the
operating direction and the mounting
position according to Table 5-2 and Table
5-3.
Theterminals41/42and51/52canoption-
ally be assigned to the switches A and B by
turning the associated label on the terminal
block (also Fig.5-14).
321
BA
A
B
A
1
3
1 Proximity switches 2 Metal tag 3 Adjustment screw
Fig.5-12: Limit switches