Samson 3738-20, Монтаж и эксплуатация

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EB 8390 EN 13
Design and principle of operation
3.2 Communication
The electronic limit switch can be configured
with SAMSON's TROVIS-VIEW Configura
-
tion and Operator Interface.
The electronic limit switch has for this pur-
pose a SAMSON SSP interface to allow the
RS-232 or USB port of a computer to be
connected to it over a serial interface adapt-
er cable. The TROVIS-VIEW software en-
ables the user to easily configure the elec -
tronic limit switch as well as view and docu-
ment process parameters on a computer.
See Table 3 for order numbers.
Note:
TROVIS-VIEW provides a uniform us-
er interface that allows users to con-
figure and parameterize various
SAMSON devices using device-spe-
cific database modules. The
Type 3738-20 device module can be
downloaded free of charge from our
website (www. samson.de) at Ser -
vices > Software > TROVIS-VIEW.
Further information on TROVIS-VIEW
(e.g. system requirements) is avail -
able on our website and in the Data
Sheet
u
T 6661.
3.3 Safety-related information
The Type 3738-20 Electronic Limit Switch
was developed to meet the requirements stip-
ulated in IEC 61508. The safety-related data
are listed in the Manufacturer’s Declaration
HE 1163. The conformity of the development
process and the performed FMEDA as well
as the statements in the Manufacturer’s Dec-
laration HE 1163 are certified by TÜV
Rheinland Industrie Service GmbH in the
Certificate 968/EL 485.01/09 of 2009-11-
09.
Type 3738-20-xxx1000xxxx00 in combi-
nation with an external solenoid valve
The forwarding of the switching voltage for
the external solenoid valve by the
Type 3738-20-xxx1000xxxx00 Electronic
Limit Switch has the same quality as wiring
and does not lead to a change in the safe-
ty-related data of the circuit.
Safety-related assumptions
Safety-related end position monitoring
All switching contacts of the Type 3738-20
Electronic Limit Switch behave as stipulated
in DIN EN 60947-5-6 and are suitable for
use in safety-instrumented systems up to
SIL 2 (single device) and SIL 3 (redundant
configuration) according to TÜV/IEC 61508.
The contacts can be used either as NC or
NO contacts. Their switching states are indi-
cated according to DIN EN 60947-5-6.
Contact A is assigned to the end position for
the fail-safe position (limit switch for fail-safe
position). The fail-safe position is the end po-
sition to which the single-acting actuator is
moved by the spring-return mechanism when
the solenoid valve is de-energized.
Emergency venting
When the optional integrated solenoid valve
is used, the electronic limit switch discharges
its pneumatic output to the atmosphere when
the solenoid valve is de-energized. This
causes the mounted actuator to be vented.
