Samson 3767, Translation Of Original Instructions

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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 amplifiers to be connected
in the output circuit (see section 5.7.1
).
When the tag (2) is located in the inductive
field of the switch, the switch assumes a high
resistance. When it moves outside the field,
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 ).
3 2 1
B A
A
B
A
1
3
1 Proximity switches 2 Metal tag 3 Adjustment screw
Fig. 5-12: Limit switches