Retrofitting An Inductive Limit Switch - Samson 3730-2 Mounting And Operating Instructions

Software adaptation
− Code 38 (inductive alarm is set to YES).
− The inductive limit switch is connected to
the terminals +41/–42.
− The device is set up accordingly in the
delivered state.
Adjusting the switching point
Note:

During adjustment or testing, the
switching point must always be ap-
proached from mid-position (50 %).
To guarantee the switching under all ambient
conditions, adjust the switching point ap-
prox. 5 % before the mechanical stop (OPEN
– CLOSED).
For CLOSED position:
1. Initialize the positioner.
2. Move the valve to 5 % in the MAN mode
(see display).
3. Adjust the tag at the yellow adjustment
screw (2) until the tag enters or leaves
the field and the switching amplifier re-
sponds.
You can measure the switching voltage
as an indicator.
Contact function:
− Tag leaving the field > contact is closed.
− Tag entering the field > contact is
opened.
EB 8384-2 EN
Adjusting the limit switch
For OPEN position:
1. Initialize the positioner.
2. Move the valve to 95 % in the MAN
mode (see display).
3. Adjust the tag (1) at the yellow adjust-
ment screw (2) until the tag enters or
leaves the field of the proximity switch
(3).
You can measure the switching voltage
as an indicator.
Contact function:
− Tag leaving the field > contact is closed.
− Tag entering the field > contact is
opened.
9.1 Retrofitting an inductive
limit switch
Required retrofit kit:
Limit switch
Note:

The same requirements apply to ret-
rofitting an inductive limit switch as to
servicing the positioner. For explo-
sion-protected positioners, the re-
quirements in section 11 need to be
kept. Check the "Limit switch, induc-
tive" box on the nameplate after in-
stalling the limit switch.
Order no. 1400-7460
81