Optional Additional Functions; Inductive Limit Contacts; Software Limit Contacts; Position Transmitter - Samson TROVIS 3730-1 Mounting And Operating Instructions

6 Optional additional functions

The optional additional functions of the
TROVIS 3730-1 Positioner allows it to be
adapted to specific requirements.

6.1 Inductive limit contacts

Limit contacts with mechanical position pick-
up issue a signal to a control system when
the valve reaches one of the two adjustable
limits.
Inductive proximity switches are operated by
adjustable tags. The operation of the induc-
tive limit contacts requires switching amplifi-
ers to be connected in the output circuit (see
section 5.14.3).
Î Connect the inductive limit contacts ac-
cording to Fig. 27.

6.2 Software limit contacts

The software limit contacts signalize that the
valve has reached one of the two adjustable
limits.
− When limit 1 is not reached
− When limit 2 is exceeded
The following versions are available:
− Connection of a PLC according to
IEC 61131-2, P
− Connection to NAMUR switching
amplifier according to EN 60947-5-6
(see section 5.14.3)
Î Connect software limit contacts accord-
ing to Fig. 28.
EB 8484-1 EN
= 400 mW
max
Optional additional functions

6.3 Position transmitter

The position transmitter is a two-wire trans-
mitter and issues the travel sensor signal (4
to 20 mA) processed by the microcontroller.
This signal is issued independent of the posi-
tioner's input signal. Additionally, the posi-
tion transmitter allows positioner faults to be
indicated over a signal current of 2.4 mA or
21.6 mA.
Î Connect the position transmitter accord-
ing to Fig. 29.
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